Hello!
-Hello!
+after
'); //after
-``` +insertAfter(document.getElementById('myId'), 'after
'); //after
+```before
'); //before
before
'); //before
element on the page will have a font-size of 20px -``` +setStyle(document.querySelector('p'), 'font-size', '20px'); // The first
element on the page will have a font-size of 20px +```
lorem ipsum
'); // 'lorem ipsum' -``` +stripHTMLTags('lorem ipsum
'); // 'lorem ipsum' +```
](https://github.com/Chalarangelo)
](https://github.com/flxwu)
](https://github.com/fejes713)
](https://github.com/kingdavidmartins)
](https://github.com/iamsoorena)
](https://github.com/elderhsouza)
](https://github.com/skatcat31)
](https://github.com/atomiks)](https://github.com/Chalarangelo)](https://github.com/flxwu)](https://github.com/fejes713)](https://github.com/kingdavidmartins)](https://github.com/iamsoorena)](https://github.com/elderhsouza)](https://github.com/skatcat31)](https://github.com/atomiks)Returns the current URL.
Use window.location.href to get current URL.
const currentURL = () => window.location.href;
currentURL(); // 'https://google.com' -
Detects wether the website is being opened in a mobile device or a desktop/laptop.
Use a regular expression to test the navigator.userAgent property to figure out if the device is a mobile device or a desktop/laptop.
const detectDeviceType = () => +
Detects whether the website is being opened in a mobile device or a desktop/laptop.
Use a regular expression to test the navigator.userAgent property to figure out if the device is a mobile device or a desktop/laptop.
const detectDeviceType = () => /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent) ? 'Mobile' : 'Desktop'; diff --git a/docs/function.html b/docs/function.html index f391a6cc6..6c6291409 100644 --- a/docs/function.html +++ b/docs/function.html @@ -153,6 +153,7 @@ console.log< + const lengthIs4 = checkProp(l => l === 4, 'length'); lengthIs4([]); // false lengthIs4([1,2,3,4]); // true diff --git a/snippets/checkProp.md b/snippets/checkProp.md index 599399127..86a412cee 100644 --- a/snippets/checkProp.md +++ b/snippets/checkProp.md @@ -18,6 +18,7 @@ const checkProp = (predicate, prop) => obj => !!predicate(obj[prop]); + const lengthIs4 = checkProp(l => l === 4, 'length'); lengthIs4([]); // false lengthIs4([1,2,3,4]); // true diff --git a/test/_30s.js b/test/_30s.js index c36428b8e..1be8796e9 100644 --- a/test/_30s.js +++ b/test/_30s.js @@ -1,1537 +1,1537 @@ const fs = typeof require !== "undefined" && require('fs'); const crypto = typeof require !== "undefined" && require('crypto'); -const all = (arr, fn = Boolean) => arr.every(fn); -const allEqual = arr => arr.every(val => val === arr[0]); -const any = (arr, fn = Boolean) => arr.some(fn); -const approximatelyEqual = (v1, v2, epsilon = 0.001) => Math.abs(v1 - v2) < epsilon; -const arrayToCSV = (arr, delimiter = ',') => - arr - .map(v => v.map(x => (isNaN(x) ? `"${x.replace(/"/g, '""')}"` : x)).join(delimiter)) - .join('\n'); -const arrayToHtmlList = (arr, listID) => - (el => ( - (el = document.querySelector('#' + listID)), - (el.innerHTML += arr.map(item => `${item} `).join('')) - ))(); -const ary = (fn, n) => (...args) => fn(...args.slice(0, n)); -const atob = str => Buffer.from(str, 'base64').toString('binary'); -const attempt = (fn, ...args) => { - try { - return fn(...args); - } catch (e) { - return e instanceof Error ? e : new Error(e); - } -}; -const average = (...nums) => nums.reduce((acc, val) => acc + val, 0) / nums.length; -const averageBy = (arr, fn) => - arr.map(typeof fn === 'function' ? fn : val => val[fn]).reduce((acc, val) => acc + val, 0) / - arr.length; -const bifurcate = (arr, filter) => - arr.reduce((acc, val, i) => (acc[filter[i] ? 0 : 1].push(val), acc), [[], []]); -const bifurcateBy = (arr, fn) => - arr.reduce((acc, val, i) => (acc[fn(val, i) ? 0 : 1].push(val), acc), [[], []]); -const bind = (fn, context, ...boundArgs) => (...args) => fn.apply(context, [...boundArgs, ...args]); -const bindAll = (obj, ...fns) => - fns.forEach( - fn => ( - (f = obj[fn]), - (obj[fn] = function() { - return f.apply(obj); - }) - ) - ); -const bindKey = (context, fn, ...boundArgs) => (...args) => - context[fn].apply(context, [...boundArgs, ...args]); -const binomialCoefficient = (n, k) => { - if (Number.isNaN(n) || Number.isNaN(k)) return NaN; - if (k < 0 || k > n) return 0; - if (k === 0 || k === n) return 1; - if (k === 1 || k === n - 1) return n; - if (n - k < k) k = n - k; - let res = n; - for (let j = 2; j <= k; j++) res *= (n - j + 1) / j; - return Math.round(res); -}; -const bottomVisible = () => - document.documentElement.clientHeight + window.scrollY >= - (document.documentElement.scrollHeight || document.documentElement.clientHeight); -const btoa = str => Buffer.from(str, 'binary').toString('base64'); -const byteSize = str => new Blob([str]).size; +const CSVToArray = (data, delimiter = ',', omitFirstRow = false) => + data + .slice(omitFirstRow ? data.indexOf('\n') + 1 : 0) + .split('\n') + .map(v => v.split(delimiter)); +const CSVToJSON = (data, delimiter = ',') => { + const titles = data.slice(0, data.indexOf('\n')).split(delimiter); + return data + .slice(data.indexOf('\n') + 1) + .split('\n') + .map(v => { + const values = v.split(delimiter); + return titles.reduce((obj, title, index) => ((obj[title] = values[index]), obj), {}); + }); +}; + +const JSONToFile = (obj, filename) => + fs.writeFile(`${filename}.json`, JSON.stringify(obj, null, 2)); +const JSONtoCSV = (arr, columns, delimiter = ',') => + [ + columns.join(delimiter), + ...arr.map(obj => + columns.reduce( + (acc, key) => `${acc}${!acc.length ? '' : delimiter}"${!obj[key] ? '' : obj[key]}"`, + '' + ) + ) + ].join('\n'); +const RGBToHex = (r, g, b) => ((r << 16) + (g << 8) + b).toString(16).padStart(6, '0'); +const URLJoin = (...args) => + args + .join('/') + .replace(/[\/]+/g, '/') + .replace(/^(.+):\//, '$1://') + .replace(/^file:/, 'file:/') + .replace(/\/(\?|&|#[^!])/g, '$1') + .replace(/\?/g, '&') + .replace('&', '?'); +const UUIDGeneratorBrowser = () => + ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c => + (c ^ (crypto.getRandomValues(new Uint8Array(1))[0] & (15 >> (c / 4)))).toString(16) + ); + +const UUIDGeneratorNode = () => + ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c => + (c ^ (crypto.randomBytes(1)[0] & (15 >> (c / 4)))).toString(16) + ); +const all = (arr, fn = Boolean) => arr.every(fn); +const allEqual = arr => arr.every(val => val === arr[0]); +const any = (arr, fn = Boolean) => arr.some(fn); +const approximatelyEqual = (v1, v2, epsilon = 0.001) => Math.abs(v1 - v2) < epsilon; +const arrayToCSV = (arr, delimiter = ',') => + arr + .map(v => v.map(x => (isNaN(x) ? `"${x.replace(/"/g, '""')}"` : x)).join(delimiter)) + .join('\n'); +const arrayToHtmlList = (arr, listID) => + (el => ( + (el = document.querySelector('#' + listID)), + (el.innerHTML += arr.map(item => `${item} `).join('')) + ))(); +const ary = (fn, n) => (...args) => fn(...args.slice(0, n)); +const atob = str => Buffer.from(str, 'base64').toString('binary'); +const attempt = (fn, ...args) => { + try { + return fn(...args); + } catch (e) { + return e instanceof Error ? e : new Error(e); + } +}; +const average = (...nums) => nums.reduce((acc, val) => acc + val, 0) / nums.length; +const averageBy = (arr, fn) => + arr.map(typeof fn === 'function' ? fn : val => val[fn]).reduce((acc, val) => acc + val, 0) / + arr.length; +const bifurcate = (arr, filter) => + arr.reduce((acc, val, i) => (acc[filter[i] ? 0 : 1].push(val), acc), [[], []]); +const bifurcateBy = (arr, fn) => + arr.reduce((acc, val, i) => (acc[fn(val, i) ? 0 : 1].push(val), acc), [[], []]); +const bind = (fn, context, ...boundArgs) => (...args) => fn.apply(context, [...boundArgs, ...args]); +const bindAll = (obj, ...fns) => + fns.forEach( + fn => ( + (f = obj[fn]), + (obj[fn] = function() { + return f.apply(obj); + }) + ) + ); +const bindKey = (context, fn, ...boundArgs) => (...args) => + context[fn].apply(context, [...boundArgs, ...args]); +const binomialCoefficient = (n, k) => { + if (Number.isNaN(n) || Number.isNaN(k)) return NaN; + if (k < 0 || k > n) return 0; + if (k === 0 || k === n) return 1; + if (k === 1 || k === n - 1) return n; + if (n - k < k) k = n - k; + let res = n; + for (let j = 2; j <= k; j++) res *= (n - j + 1) / j; + return Math.round(res); +}; +const bottomVisible = () => + document.documentElement.clientHeight + window.scrollY >= + (document.documentElement.scrollHeight || document.documentElement.clientHeight); +const btoa = str => Buffer.from(str, 'binary').toString('base64'); +const byteSize = str => new Blob([str]).size; const call = (key, ...args) => context => context[key](...args); -const capitalize = ([first, ...rest], lowerRest = false) => - first.toUpperCase() + (lowerRest ? rest.join('').toLowerCase() : rest.join('')); -const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperCase()); -const castArray = val => (Array.isArray(val) ? val : [val]); -const chainAsync = fns => { - let curr = 0; - const last = fns[fns.length - 1]; - const next = () => { - const fn = fns[curr++]; - fn === last ? fn() : fn(next); - }; - next(); -}; -const checkProp = (predicate, prop) => obj => !!predicate(obj[prop]); -const chunk = (arr, size) => - Array.from({ length: Math.ceil(arr.length / size) }, (v, i) => - arr.slice(i * size, i * size + size) - ); -const clampNumber = (num, a, b) => Math.max(Math.min(num, Math.max(a, b)), Math.min(a, b)); -const cloneRegExp = regExp => new RegExp(regExp.source, regExp.flags); -const coalesce = (...args) => args.find(_ => ![undefined, null].includes(_)); -const coalesceFactory = valid => (...args) => args.find(valid); +const capitalize = ([first, ...rest], lowerRest = false) => + first.toUpperCase() + (lowerRest ? rest.join('').toLowerCase() : rest.join('')); +const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperCase()); +const castArray = val => (Array.isArray(val) ? val : [val]); +const chainAsync = fns => { + let curr = 0; + const last = fns[fns.length - 1]; + const next = () => { + const fn = fns[curr++]; + fn === last ? fn() : fn(next); + }; + next(); +}; +const checkProp = (predicate, prop) => obj => !!predicate(obj[prop]); +const chunk = (arr, size) => + Array.from({ length: Math.ceil(arr.length / size) }, (v, i) => + arr.slice(i * size, i * size + size) + ); +const clampNumber = (num, a, b) => Math.max(Math.min(num, Math.max(a, b)), Math.min(a, b)); +const cloneRegExp = regExp => new RegExp(regExp.source, regExp.flags); +const coalesce = (...args) => args.find(_ => ![undefined, null].includes(_)); +const coalesceFactory = valid => (...args) => args.find(valid); const collectInto = fn => (...args) => fn(args); -const colorize = (...args) => ({ - black: `\x1b[30m${args.join(' ')}`, - red: `\x1b[31m${args.join(' ')}`, - green: `\x1b[32m${args.join(' ')}`, - yellow: `\x1b[33m${args.join(' ')}`, - blue: `\x1b[34m${args.join(' ')}`, - magenta: `\x1b[35m${args.join(' ')}`, - cyan: `\x1b[36m${args.join(' ')}`, - white: `\x1b[37m${args.join(' ')}`, - bgBlack: `\x1b[40m${args.join(' ')}\x1b[0m`, - bgRed: `\x1b[41m${args.join(' ')}\x1b[0m`, - bgGreen: `\x1b[42m${args.join(' ')}\x1b[0m`, - bgYellow: `\x1b[43m${args.join(' ')}\x1b[0m`, - bgBlue: `\x1b[44m${args.join(' ')}\x1b[0m`, - bgMagenta: `\x1b[45m${args.join(' ')}\x1b[0m`, - bgCyan: `\x1b[46m${args.join(' ')}\x1b[0m`, - bgWhite: `\x1b[47m${args.join(' ')}\x1b[0m` -}); -const compact = arr => arr.filter(Boolean); -const compactWhitespace = str => str.replace(/\s{2,}/g, ' '); -const compose = (...fns) => fns.reduce((f, g) => (...args) => f(g(...args))); -const composeRight = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args))); -const converge = (converger, fns) => (...args) => converger(...fns.map(fn => fn.apply(null, args))); -const copyToClipboard = str => { - const el = document.createElement('textarea'); - el.value = str; - el.setAttribute('readonly', ''); - el.style.position = 'absolute'; - el.style.left = '-9999px'; - document.body.appendChild(el); - const selected = - document.getSelection().rangeCount > 0 ? document.getSelection().getRangeAt(0) : false; - el.select(); - document.execCommand('copy'); - document.body.removeChild(el); - if (selected) { - document.getSelection().removeAllRanges(); - document.getSelection().addRange(selected); - } -}; -const countBy = (arr, fn) => - arr.map(typeof fn === 'function' ? fn : val => val[fn]).reduce((acc, val) => { - acc[val] = (acc[val] || 0) + 1; - return acc; - }, {}); -const counter = (selector, start, end, step = 1, duration = 2000) => { - let current = start, - _step = (end - start) * step < 0 ? -step : step, - timer = setInterval(() => { - current += _step; - document.querySelector(selector).innerHTML = current; - if (current >= end) document.querySelector(selector).innerHTML = end; - if (current >= end) clearInterval(timer); - }, Math.abs(Math.floor(duration / (end - start)))); - return timer; -}; -const countOccurrences = (arr, val) => arr.reduce((a, v) => (v === val ? a + 1 : a), 0); - -const createDirIfNotExists = dir => (!fs.existsSync(dir) ? fs.mkdirSync(dir) : undefined); -const createElement = str => { - const el = document.createElement('div'); - el.innerHTML = str; - return el.firstElementChild; -}; -const createEventHub = () => ({ - hub: Object.create(null), - emit(event, data) { - (this.hub[event] || []).forEach(handler => handler(data)); - }, - on(event, handler) { - if (!this.hub[event]) this.hub[event] = []; - this.hub[event].push(handler); - }, - off(event, handler) { - const i = (this.hub[event] || []).findIndex(h => h === handler); - if (i > -1) this.hub[event].splice(i, 1); - } -}); -const CSVToArray = (data, delimiter = ',', omitFirstRow = false) => - data - .slice(omitFirstRow ? data.indexOf('\n') + 1 : 0) - .split('\n') - .map(v => v.split(delimiter)); -const CSVToJSON = (data, delimiter = ',') => { - const titles = data.slice(0, data.indexOf('\n')).split(delimiter); - return data - .slice(data.indexOf('\n') + 1) - .split('\n') - .map(v => { - const values = v.split(delimiter); - return titles.reduce((obj, title, index) => ((obj[title] = values[index]), obj), {}); - }); -}; -const currentURL = () => window.location.href; -const curry = (fn, arity = fn.length, ...args) => - arity <= args.length ? fn(...args) : curry.bind(null, fn, arity, ...args); -const dayOfYear = date => - Math.floor((date - new Date(date.getFullYear(), 0, 0)) / 1000 / 60 / 60 / 24); -const debounce = (fn, ms = 0) => { - let timeoutId; - return function(...args) { - clearTimeout(timeoutId); - timeoutId = setTimeout(() => fn.apply(this, args), ms); - }; -}; -const decapitalize = ([first, ...rest], upperRest = false) => - first.toLowerCase() + (upperRest ? rest.join('').toUpperCase() : rest.join('')); -const deepClone = obj => { - let clone = Object.assign({}, obj); - Object.keys(clone).forEach( - key => (clone[key] = typeof obj[key] === 'object' ? deepClone(obj[key]) : obj[key]) - ); - return Array.isArray(obj) && obj.length - ? (clone.length = obj.length) && Array.from(clone) - : Array.isArray(obj) - ? Array.from(obj) - : clone; -}; -const deepFlatten = arr => [].concat(...arr.map(v => (Array.isArray(v) ? deepFlatten(v) : v))); -const deepFreeze = obj => - Object.keys(obj).forEach( - prop => - !(obj[prop] instanceof Object) || Object.isFrozen(obj[prop]) ? null : deepFreeze(obj[prop]) - ) || Object.freeze(obj); -const deepGet = (obj, keys) => keys.reduce((xs, x) => (xs && xs[x] ? xs[x] : null), obj); -const deepMapKeys = (obj, f) => - Array.isArray(obj) - ? obj.map(val => deepMapKeys(val, f)) - : typeof obj === 'object' - ? Object.keys(obj).reduce((acc, current) => { - const val = obj[current]; - acc[f(current)] = - val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val); - return acc; - }, {}) - : obj; -const defaults = (obj, ...defs) => Object.assign({}, obj, ...defs.reverse(), obj); -const defer = (fn, ...args) => setTimeout(fn, 1, ...args); -const degreesToRads = deg => (deg * Math.PI) / 180.0; -const delay = (fn, wait, ...args) => setTimeout(fn, wait, ...args); -const detectDeviceType = () => - /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent) - ? 'Mobile' - : 'Desktop'; -const difference = (a, b) => { - const s = new Set(b); - return a.filter(x => !s.has(x)); -}; -const differenceBy = (a, b, fn) => { - const s = new Set(b.map(fn)); - return a.map(fn).filter(el => !s.has(el)); -}; -const differenceWith = (arr, val, comp) => arr.filter(a => val.findIndex(b => comp(a, b)) === -1); -const dig = (obj, target) => - target in obj - ? obj[target] - : Object.values(obj).reduce((acc, val) => { - if (acc !== undefined) return acc; - if (typeof val === 'object') return dig(val, target); - }, undefined); -const digitize = n => [...`${n}`].map(i => parseInt(i)); -const distance = (x0, y0, x1, y1) => Math.hypot(x1 - x0, y1 - y0); -const drop = (arr, n = 1) => arr.slice(n); -const dropRight = (arr, n = 1) => arr.slice(0, -n); -const dropRightWhile = (arr, func) => { - while (arr.length > 0 && !func(arr[arr.length - 1])) arr = arr.slice(0, -1); - return arr; -}; -const dropWhile = (arr, func) => { - while (arr.length > 0 && !func(arr[0])) arr = arr.slice(1); - return arr; -}; -const elementContains = (parent, child) => parent !== child && parent.contains(child); -const elementIsVisibleInViewport = (el, partiallyVisible = false) => { - const { top, left, bottom, right } = el.getBoundingClientRect(); - const { innerHeight, innerWidth } = window; - return partiallyVisible - ? ((top > 0 && top < innerHeight) || (bottom > 0 && bottom < innerHeight)) && - ((left > 0 && left < innerWidth) || (right > 0 && right < innerWidth)) - : top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth; -}; -const elo = ([...ratings], kFactor = 32, selfRating) => { - const [a, b] = ratings; - const expectedScore = (self, opponent) => 1 / (1 + 10 ** ((opponent - self) / 400)); - const newRating = (rating, i) => - (selfRating || rating) + kFactor * (i - expectedScore(i ? a : b, i ? b : a)); - if (ratings.length === 2) return [newRating(a, 1), newRating(b, 0)]; - - for (let i = 0, len = ratings.length; i < len; i++) { - let j = i; - while (j < len - 1) { - j++; - [ratings[i], ratings[j]] = elo([ratings[i], ratings[j]], kFactor); - } - } - return ratings; -}; -const equals = (a, b) => { - if (a === b) return true; - if (a instanceof Date && b instanceof Date) return a.getTime() === b.getTime(); - if (!a || !b || (typeof a !== 'object' && typeof b !== 'object')) return a === b; - if (a === null || a === undefined || b === null || b === undefined) return false; - if (a.prototype !== b.prototype) return false; - let keys = Object.keys(a); - if (keys.length !== Object.keys(b).length) return false; - return keys.every(k => equals(a[k], b[k])); -}; -const escapeHTML = str => - str.replace( - /[&<>'"]/g, - tag => - ({ - '&': '&', - '<': '<', - '>': '>', - "'": ''', - '"': '"' - }[tag] || tag) - ); -const escapeRegExp = str => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); -const everyNth = (arr, nth) => arr.filter((e, i) => i % nth === nth - 1); -const extendHex = shortHex => - '#' + - shortHex - .slice(shortHex.startsWith('#') ? 1 : 0) - .split('') - .map(x => x + x) - .join(''); -const factorial = n => - n < 0 - ? (() => { - throw new TypeError('Negative numbers are not allowed!'); - })() - : n <= 1 - ? 1 - : n * factorial(n - 1); -const fibonacci = n => - Array.from({ length: n }).reduce( - (acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i), - [] - ); +const colorize = (...args) => ({ + black: `\x1b[30m${args.join(' ')}`, + red: `\x1b[31m${args.join(' ')}`, + green: `\x1b[32m${args.join(' ')}`, + yellow: `\x1b[33m${args.join(' ')}`, + blue: `\x1b[34m${args.join(' ')}`, + magenta: `\x1b[35m${args.join(' ')}`, + cyan: `\x1b[36m${args.join(' ')}`, + white: `\x1b[37m${args.join(' ')}`, + bgBlack: `\x1b[40m${args.join(' ')}\x1b[0m`, + bgRed: `\x1b[41m${args.join(' ')}\x1b[0m`, + bgGreen: `\x1b[42m${args.join(' ')}\x1b[0m`, + bgYellow: `\x1b[43m${args.join(' ')}\x1b[0m`, + bgBlue: `\x1b[44m${args.join(' ')}\x1b[0m`, + bgMagenta: `\x1b[45m${args.join(' ')}\x1b[0m`, + bgCyan: `\x1b[46m${args.join(' ')}\x1b[0m`, + bgWhite: `\x1b[47m${args.join(' ')}\x1b[0m` +}); +const compact = arr => arr.filter(Boolean); +const compactWhitespace = str => str.replace(/\s{2,}/g, ' '); +const compose = (...fns) => fns.reduce((f, g) => (...args) => f(g(...args))); +const composeRight = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args))); +const converge = (converger, fns) => (...args) => converger(...fns.map(fn => fn.apply(null, args))); +const copyToClipboard = str => { + const el = document.createElement('textarea'); + el.value = str; + el.setAttribute('readonly', ''); + el.style.position = 'absolute'; + el.style.left = '-9999px'; + document.body.appendChild(el); + const selected = + document.getSelection().rangeCount > 0 ? document.getSelection().getRangeAt(0) : false; + el.select(); + document.execCommand('copy'); + document.body.removeChild(el); + if (selected) { + document.getSelection().removeAllRanges(); + document.getSelection().addRange(selected); + } +}; +const countBy = (arr, fn) => + arr.map(typeof fn === 'function' ? fn : val => val[fn]).reduce((acc, val) => { + acc[val] = (acc[val] || 0) + 1; + return acc; + }, {}); +const countOccurrences = (arr, val) => arr.reduce((a, v) => (v === val ? a + 1 : a), 0); +const counter = (selector, start, end, step = 1, duration = 2000) => { + let current = start, + _step = (end - start) * step < 0 ? -step : step, + timer = setInterval(() => { + current += _step; + document.querySelector(selector).innerHTML = current; + if (current >= end) document.querySelector(selector).innerHTML = end; + if (current >= end) clearInterval(timer); + }, Math.abs(Math.floor(duration / (end - start)))); + return timer; +}; + +const createDirIfNotExists = dir => (!fs.existsSync(dir) ? fs.mkdirSync(dir) : undefined); +const createElement = str => { + const el = document.createElement('div'); + el.innerHTML = str; + return el.firstElementChild; +}; +const createEventHub = () => ({ + hub: Object.create(null), + emit(event, data) { + (this.hub[event] || []).forEach(handler => handler(data)); + }, + on(event, handler) { + if (!this.hub[event]) this.hub[event] = []; + this.hub[event].push(handler); + }, + off(event, handler) { + const i = (this.hub[event] || []).findIndex(h => h === handler); + if (i > -1) this.hub[event].splice(i, 1); + } +}); +const currentURL = () => window.location.href; +const curry = (fn, arity = fn.length, ...args) => + arity <= args.length ? fn(...args) : curry.bind(null, fn, arity, ...args); +const dayOfYear = date => + Math.floor((date - new Date(date.getFullYear(), 0, 0)) / 1000 / 60 / 60 / 24); +const debounce = (fn, ms = 0) => { + let timeoutId; + return function(...args) { + clearTimeout(timeoutId); + timeoutId = setTimeout(() => fn.apply(this, args), ms); + }; +}; +const decapitalize = ([first, ...rest], upperRest = false) => + first.toLowerCase() + (upperRest ? rest.join('').toUpperCase() : rest.join('')); +const deepClone = obj => { + let clone = Object.assign({}, obj); + Object.keys(clone).forEach( + key => (clone[key] = typeof obj[key] === 'object' ? deepClone(obj[key]) : obj[key]) + ); + return Array.isArray(obj) && obj.length + ? (clone.length = obj.length) && Array.from(clone) + : Array.isArray(obj) + ? Array.from(obj) + : clone; +}; +const deepFlatten = arr => [].concat(...arr.map(v => (Array.isArray(v) ? deepFlatten(v) : v))); +const deepFreeze = obj => + Object.keys(obj).forEach( + prop => + !(obj[prop] instanceof Object) || Object.isFrozen(obj[prop]) ? null : deepFreeze(obj[prop]) + ) || Object.freeze(obj); +const deepGet = (obj, keys) => keys.reduce((xs, x) => (xs && xs[x] ? xs[x] : null), obj); +const deepMapKeys = (obj, f) => + Array.isArray(obj) + ? obj.map(val => deepMapKeys(val, f)) + : typeof obj === 'object' + ? Object.keys(obj).reduce((acc, current) => { + const val = obj[current]; + acc[f(current)] = + val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val); + return acc; + }, {}) + : obj; +const defaults = (obj, ...defs) => Object.assign({}, obj, ...defs.reverse(), obj); +const defer = (fn, ...args) => setTimeout(fn, 1, ...args); +const degreesToRads = deg => (deg * Math.PI) / 180.0; +const delay = (fn, wait, ...args) => setTimeout(fn, wait, ...args); +const detectDeviceType = () => + /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent) + ? 'Mobile' + : 'Desktop'; +const difference = (a, b) => { + const s = new Set(b); + return a.filter(x => !s.has(x)); +}; +const differenceBy = (a, b, fn) => { + const s = new Set(b.map(fn)); + return a.map(fn).filter(el => !s.has(el)); +}; +const differenceWith = (arr, val, comp) => arr.filter(a => val.findIndex(b => comp(a, b)) === -1); +const dig = (obj, target) => + target in obj + ? obj[target] + : Object.values(obj).reduce((acc, val) => { + if (acc !== undefined) return acc; + if (typeof val === 'object') return dig(val, target); + }, undefined); +const digitize = n => [...`${n}`].map(i => parseInt(i)); +const distance = (x0, y0, x1, y1) => Math.hypot(x1 - x0, y1 - y0); +const drop = (arr, n = 1) => arr.slice(n); +const dropRight = (arr, n = 1) => arr.slice(0, -n); +const dropRightWhile = (arr, func) => { + while (arr.length > 0 && !func(arr[arr.length - 1])) arr = arr.slice(0, -1); + return arr; +}; +const dropWhile = (arr, func) => { + while (arr.length > 0 && !func(arr[0])) arr = arr.slice(1); + return arr; +}; +const elementContains = (parent, child) => parent !== child && parent.contains(child); +const elementIsVisibleInViewport = (el, partiallyVisible = false) => { + const { top, left, bottom, right } = el.getBoundingClientRect(); + const { innerHeight, innerWidth } = window; + return partiallyVisible + ? ((top > 0 && top < innerHeight) || (bottom > 0 && bottom < innerHeight)) && + ((left > 0 && left < innerWidth) || (right > 0 && right < innerWidth)) + : top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth; +}; +const elo = ([...ratings], kFactor = 32, selfRating) => { + const [a, b] = ratings; + const expectedScore = (self, opponent) => 1 / (1 + 10 ** ((opponent - self) / 400)); + const newRating = (rating, i) => + (selfRating || rating) + kFactor * (i - expectedScore(i ? a : b, i ? b : a)); + if (ratings.length === 2) return [newRating(a, 1), newRating(b, 0)]; + + for (let i = 0, len = ratings.length; i < len; i++) { + let j = i; + while (j < len - 1) { + j++; + [ratings[i], ratings[j]] = elo([ratings[i], ratings[j]], kFactor); + } + } + return ratings; +}; +const equals = (a, b) => { + if (a === b) return true; + if (a instanceof Date && b instanceof Date) return a.getTime() === b.getTime(); + if (!a || !b || (typeof a !== 'object' && typeof b !== 'object')) return a === b; + if (a === null || a === undefined || b === null || b === undefined) return false; + if (a.prototype !== b.prototype) return false; + let keys = Object.keys(a); + if (keys.length !== Object.keys(b).length) return false; + return keys.every(k => equals(a[k], b[k])); +}; +const escapeHTML = str => + str.replace( + /[&<>'"]/g, + tag => + ({ + '&': '&', + '<': '<', + '>': '>', + "'": ''', + '"': '"' + }[tag] || tag) + ); +const escapeRegExp = str => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); +const everyNth = (arr, nth) => arr.filter((e, i) => i % nth === nth - 1); +const extendHex = shortHex => + '#' + + shortHex + .slice(shortHex.startsWith('#') ? 1 : 0) + .split('') + .map(x => x + x) + .join(''); +const factorial = n => + n < 0 + ? (() => { + throw new TypeError('Negative numbers are not allowed!'); + })() + : n <= 1 + ? 1 + : n * factorial(n - 1); +const fibonacci = n => + Array.from({ length: n }).reduce( + (acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i), + [] + ); const filterFalsy = arr => arr.filter(Boolean); -const filterNonUnique = arr => arr.filter(i => arr.indexOf(i) === arr.lastIndexOf(i)); -const filterNonUniqueBy = (arr, fn) => - arr.filter((v, i) => arr.every((x, j) => (i === j) === fn(v, x, i, j))); -const findKey = (obj, fn) => Object.keys(obj).find(key => fn(obj[key], key, obj)); -const findLast = (arr, fn) => arr.filter(fn).pop(); -const findLastIndex = (arr, fn) => - arr - .map((val, i) => [i, val]) - .filter(([i, val]) => fn(val, i, arr)) - .pop()[0]; -const findLastKey = (obj, fn) => - Object.keys(obj) - .reverse() - .find(key => fn(obj[key], key, obj)); -const flatten = (arr, depth = 1) => - arr.reduce((a, v) => a.concat(depth > 1 && Array.isArray(v) ? flatten(v, depth - 1) : v), []); -const flattenObject = (obj, prefix = '') => - Object.keys(obj).reduce((acc, k) => { - const pre = prefix.length ? prefix + '.' : ''; - if (typeof obj[k] === 'object') Object.assign(acc, flattenObject(obj[k], pre + k)); - else acc[pre + k] = obj[k]; - return acc; - }, {}); +const filterNonUnique = arr => arr.filter(i => arr.indexOf(i) === arr.lastIndexOf(i)); +const filterNonUniqueBy = (arr, fn) => + arr.filter((v, i) => arr.every((x, j) => (i === j) === fn(v, x, i, j))); +const findKey = (obj, fn) => Object.keys(obj).find(key => fn(obj[key], key, obj)); +const findLast = (arr, fn) => arr.filter(fn).pop(); +const findLastIndex = (arr, fn) => + arr + .map((val, i) => [i, val]) + .filter(([i, val]) => fn(val, i, arr)) + .pop()[0]; +const findLastKey = (obj, fn) => + Object.keys(obj) + .reverse() + .find(key => fn(obj[key], key, obj)); +const flatten = (arr, depth = 1) => + arr.reduce((a, v) => a.concat(depth > 1 && Array.isArray(v) ? flatten(v, depth - 1) : v), []); +const flattenObject = (obj, prefix = '') => + Object.keys(obj).reduce((acc, k) => { + const pre = prefix.length ? prefix + '.' : ''; + if (typeof obj[k] === 'object') Object.assign(acc, flattenObject(obj[k], pre + k)); + else acc[pre + k] = obj[k]; + return acc; + }, {}); const flip = fn => (first, ...rest) => fn(...rest, first); -const forEachRight = (arr, callback) => - arr - .slice(0) - .reverse() - .forEach(callback); -const formatDuration = ms => { - if (ms < 0) ms = -ms; - const time = { - day: Math.floor(ms / 86400000), - hour: Math.floor(ms / 3600000) % 24, - minute: Math.floor(ms / 60000) % 60, - second: Math.floor(ms / 1000) % 60, - millisecond: Math.floor(ms) % 1000 - }; - return Object.entries(time) - .filter(val => val[1] !== 0) - .map(([key, val]) => `${val} ${key}${val !== 1 ? 's' : ''}`) - .join(', '); -}; -const formToObject = form => - Array.from(new FormData(form)).reduce( - (acc, [key, value]) => ({ - ...acc, - [key]: value - }), - {} - ); -const forOwn = (obj, fn) => Object.keys(obj).forEach(key => fn(obj[key], key, obj)); -const forOwnRight = (obj, fn) => - Object.keys(obj) - .reverse() - .forEach(key => fn(obj[key], key, obj)); -const fromCamelCase = (str, separator = '_') => - str - .replace(/([a-z\d])([A-Z])/g, '$1' + separator + '$2') - .replace(/([A-Z]+)([A-Z][a-z\d]+)/g, '$1' + separator + '$2') - .toLowerCase(); -const functionName = fn => (console.debug(fn.name), fn); -const functions = (obj, inherited = false) => - (inherited - ? [...Object.keys(obj), ...Object.keys(Object.getPrototypeOf(obj))] - : Object.keys(obj) - ).filter(key => typeof obj[key] === 'function'); -const gcd = (...arr) => { - const _gcd = (x, y) => (!y ? x : gcd(y, x % y)); - return [...arr].reduce((a, b) => _gcd(a, b)); -}; -const geometricProgression = (end, start = 1, step = 2) => - Array.from({ length: Math.floor(Math.log(end / start) / Math.log(step)) + 1 }).map( - (v, i) => start * step ** i - ); -const get = (from, ...selectors) => - [...selectors].map(s => - s - .replace(/\[([^\[\]]*)\]/g, '.$1.') - .split('.') - .filter(t => t !== '') - .reduce((prev, cur) => prev && prev[cur], from) - ); -const getColonTimeFromDate = date => date.toTimeString().slice(0, 8); -const getDaysDiffBetweenDates = (dateInitial, dateFinal) => - (dateFinal - dateInitial) / (1000 * 3600 * 24); -const getImages = (el, includeDuplicates = false) => { - const images = [...el.getElementsByTagName('img')].map(img => img.getAttribute('src')); - return includeDuplicates ? images : [...new Set(images)]; -}; -const getMeridiemSuffixOfInteger = num => - num === 0 || num === 24 - ? 12 + 'am' - : num === 12 - ? 12 + 'pm' - : num < 12 - ? (num % 12) + 'am' - : (num % 12) + 'pm'; -const getScrollPosition = (el = window) => ({ - x: el.pageXOffset !== undefined ? el.pageXOffset : el.scrollLeft, - y: el.pageYOffset !== undefined ? el.pageYOffset : el.scrollTop -}); -const getStyle = (el, ruleName) => getComputedStyle(el)[ruleName]; -const getType = v => - v === undefined ? 'undefined' : v === null ? 'null' : v.constructor.name.toLowerCase(); -const getURLParameters = url => - (url.match(/([^?=&]+)(=([^&]*))/g) || []).reduce( - (a, v) => ((a[v.slice(0, v.indexOf('='))] = v.slice(v.indexOf('=') + 1)), a), - {} - ); -const groupBy = (arr, fn) => - arr.map(typeof fn === 'function' ? fn : val => val[fn]).reduce((acc, val, i) => { - acc[val] = (acc[val] || []).concat(arr[i]); - return acc; - }, {}); -const hammingDistance = (num1, num2) => ((num1 ^ num2).toString(2).match(/1/g) || '').length; -const hasClass = (el, className) => el.classList.contains(className); -const hasFlags = (...flags) => - flags.every(flag => process.argv.includes(/^-{1,2}/.test(flag) ? flag : '--' + flag)); -const hashBrowser = val => - crypto.subtle.digest('SHA-256', new TextEncoder('utf-8').encode(val)).then(h => { - let hexes = [], - view = new DataView(h); - for (let i = 0; i < view.byteLength; i += 4) - hexes.push(('00000000' + view.getUint32(i).toString(16)).slice(-8)); - return hexes.join(''); - }); - -const hashNode = val => - new Promise(resolve => - setTimeout( - () => - resolve( - crypto - .createHash('sha256') - .update(val) - .digest('hex') - ), - 0 - ) - ); -const head = arr => arr[0]; -const hexToRGB = hex => { - let alpha = false, - h = hex.slice(hex.startsWith('#') ? 1 : 0); - if (h.length === 3) h = [...h].map(x => x + x).join(''); - else if (h.length === 8) alpha = true; - h = parseInt(h, 16); - return ( - 'rgb' + - (alpha ? 'a' : '') + - '(' + - (h >>> (alpha ? 24 : 16)) + - ', ' + - ((h & (alpha ? 0x00ff0000 : 0x00ff00)) >>> (alpha ? 16 : 8)) + - ', ' + - ((h & (alpha ? 0x0000ff00 : 0x0000ff)) >>> (alpha ? 8 : 0)) + - (alpha ? `, ${h & 0x000000ff}` : '') + - ')' - ); -}; -const hide = (...el) => [...el].forEach(e => (e.style.display = 'none')); -const httpGet = (url, callback, err = console.error) => { - const request = new XMLHttpRequest(); - request.open('GET', url, true); - request.onload = () => callback(request.responseText); - request.onerror = () => err(request); - request.send(); -}; -const httpPost = (url, data, callback, err = console.error) => { - const request = new XMLHttpRequest(); - request.open('POST', url, true); - request.setRequestHeader('Content-type', 'application/json; charset=utf-8'); - request.onload = () => callback(request.responseText); - request.onerror = () => err(request); - request.send(data); -}; -const httpsRedirect = () => { - if (location.protocol !== 'https:') location.replace('https://' + location.href.split('//')[1]); -}; -const hz = (fn, iterations = 100) => { - const before = performance.now(); - for (let i = 0; i < iterations; i++) fn(); - return (1000 * iterations) / (performance.now() - before); -}; -const indentString = (str, count, indent = ' ') => str.replace(/^/gm, indent.repeat(count)); -const indexOfAll = (arr, val) => arr.reduce((acc, el, i) => (el === val ? [...acc, i] : acc), []); -const initial = arr => arr.slice(0, -1); -const initialize2DArray = (w, h, val = null) => - Array.from({ length: h }).map(() => Array.from({ length: w }).fill(val)); -const initializeArrayWithRange = (end, start = 0, step = 1) => - Array.from({ length: Math.ceil((end - start + 1) / step) }, (v, i) => i * step + start); -const initializeArrayWithRangeRight = (end, start = 0, step = 1) => - Array.from({ length: Math.ceil((end + 1 - start) / step) }).map( - (v, i, arr) => (arr.length - i - 1) * step + start - ); -const initializeArrayWithValues = (n, val = 0) => Array(n).fill(val); -const initializeNDArray = (val, ...args) => - args.length === 0 - ? val - : Array.from({ length: args[0] }).map(() => initializeNDArray(val, ...args.slice(1))); -const inRange = (n, start, end = null) => { - if (end && start > end) [end, start] = [start, end]; - return end == null ? n >= 0 && n < start : n >= start && n < end; -}; -const insertAfter = (el, htmlString) => el.insertAdjacentHTML('afterend', htmlString); -const insertBefore = (el, htmlString) => el.insertAdjacentHTML('beforebegin', htmlString); -const intersection = (a, b) => { - const s = new Set(b); - return a.filter(x => s.has(x)); -}; -const intersectionBy = (a, b, fn) => { - const s = new Set(b.map(fn)); - return a.filter(x => s.has(fn(x))); -}; -const intersectionWith = (a, b, comp) => a.filter(x => b.findIndex(y => comp(x, y)) !== -1); -const invertKeyValues = (obj, fn) => - Object.keys(obj).reduce((acc, key) => { - const val = fn ? fn(obj[key]) : obj[key]; - acc[val] = acc[val] || []; - acc[val].push(key); - return acc; - }, {}); -const is = (type, val) => ![, null].includes(val) && val.constructor === type; -const isAbsoluteURL = str => /^[a-z][a-z0-9+.-]*:/.test(str); -const isAfterDate = (dateA, dateB) => dateA > dateB; -const isAnagram = (str1, str2) => { - const normalize = str => - str - .toLowerCase() - .replace(/[^a-z0-9]/gi, '') - .split('') - .sort() - .join(''); - return normalize(str1) === normalize(str2); -}; -const isArrayLike = obj => obj != null && typeof obj[Symbol.iterator] === 'function'; -const isBeforeDate = (dateA, dateB) => dateA < dateB; -const isBoolean = val => typeof val === 'boolean'; -const isBrowser = () => ![typeof window, typeof document].includes('undefined'); -const isBrowserTabFocused = () => !document.hidden; -const isDivisible = (dividend, divisor) => dividend % divisor === 0; -const isDuplexStream = val => - val !== null && - typeof val === 'object' && - typeof val.pipe === 'function' && - typeof val._read === 'function' && - typeof val._readableState === 'object' && - typeof val._write === 'function' && - typeof val._writableState === 'object'; -const isEmpty = val => val == null || !(Object.keys(val) || val).length; -const isEven = num => num % 2 === 0; -const isFunction = val => typeof val === 'function'; -const isLowerCase = str => str === str.toLowerCase(); -const isNegativeZero = val => val === 0 && 1 / val === -Infinity; -const isNil = val => val === undefined || val === null; -const isNull = val => val === null; -const isNumber = val => typeof val === 'number' && val === val; -const isObject = obj => obj === Object(obj); -const isObjectLike = val => val !== null && typeof val === 'object'; -const isPlainObject = val => !!val && typeof val === 'object' && val.constructor === Object; -const isPrime = num => { - const boundary = Math.floor(Math.sqrt(num)); - for (var i = 2; i <= boundary; i++) if (num % i === 0) return false; - return num >= 2; -}; -const isPrimitive = val => Object(val) !== val; -const isPromiseLike = obj => - obj !== null && - (typeof obj === 'object' || typeof obj === 'function') && - typeof obj.then === 'function'; -const isReadableStream = val => - val !== null && - typeof val === 'object' && - typeof val.pipe === 'function' && - typeof val._read === 'function' && - typeof val._readableState === 'object'; -const isSameDate = (dateA, dateB) => dateA.toISOString() === dateB.toISOString(); -const isSorted = arr => { - let direction = -(arr[0] - arr[1]); - for (let [i, val] of arr.entries()) { - direction = !direction ? -(arr[i - 1] - arr[i]) : direction; - if (i === arr.length - 1) return !direction ? 0 : direction; - else if ((val - arr[i + 1]) * direction > 0) return 0; - } -}; -const isStream = val => val !== null && typeof val === 'object' && typeof val.pipe === 'function'; -const isString = val => typeof val === 'string'; -const isSymbol = val => typeof val === 'symbol'; -const isTravisCI = () => 'TRAVIS' in process.env && 'CI' in process.env; -const isUndefined = val => val === undefined; -const isUpperCase = str => str === str.toUpperCase(); -const isValidJSON = str => { - try { - JSON.parse(str); - return true; - } catch (e) { - return false; - } -}; -const isWritableStream = val => - val !== null && - typeof val === 'object' && - typeof val.pipe === 'function' && - typeof val._write === 'function' && - typeof val._writableState === 'object'; -const join = (arr, separator = ',', end = separator) => - arr.reduce( - (acc, val, i) => - i === arr.length - 2 - ? acc + val + end - : i === arr.length - 1 - ? acc + val - : acc + val + separator, - '' - ); -const JSONtoCSV = (arr, columns, delimiter = ',') => - [ - columns.join(delimiter), - ...arr.map(obj => - columns.reduce( - (acc, key) => `${acc}${!acc.length ? '' : delimiter}"${!obj[key] ? '' : obj[key]}"`, - '' - ) - ) - ].join('\n'); - -const JSONToFile = (obj, filename) => - fs.writeFile(`${filename}.json`, JSON.stringify(obj, null, 2)); -const last = arr => arr[arr.length - 1]; -const lcm = (...arr) => { - const gcd = (x, y) => (!y ? x : gcd(y, x % y)); - const _lcm = (x, y) => (x * y) / gcd(x, y); - return [...arr].reduce((a, b) => _lcm(a, b)); -}; -const longestItem = (...vals) => vals.reduce((a, x) => (x.length > a.length ? x : a)); -const lowercaseKeys = obj => - Object.keys(obj).reduce((acc, key) => { - acc[key.toLowerCase()] = obj[key]; - return acc; - }, {}); -const luhnCheck = num => { - let arr = (num + '') - .split('') - .reverse() - .map(x => parseInt(x)); - let lastDigit = arr.splice(0, 1)[0]; - let sum = arr.reduce((acc, val, i) => (i % 2 !== 0 ? acc + val : acc + ((val * 2) % 9) || 9), 0); - sum += lastDigit; - return sum % 10 === 0; -}; -const mapKeys = (obj, fn) => - Object.keys(obj).reduce((acc, k) => { - acc[fn(obj[k], k, obj)] = obj[k]; - return acc; - }, {}); -const mapNumRange = (num, inMin, inMax, outMin, outMax) => - ((num - inMin) * (outMax - outMin)) / (inMax - inMin) + outMin; -const mapObject = (arr, fn) => - (a => ( - (a = [arr, arr.map(fn)]), a[0].reduce((acc, val, ind) => ((acc[val] = a[1][ind]), acc), {}) - ))(); -const mapString = (str, fn) => - str - .split('') - .map((c, i) => fn(c, i, str)) - .join(''); -const mapValues = (obj, fn) => - Object.keys(obj).reduce((acc, k) => { - acc[k] = fn(obj[k], k, obj); - return acc; - }, {}); -const mask = (cc, num = 4, mask = '*') => `${cc}`.slice(-num).padStart(`${cc}`.length, mask); -const matches = (obj, source) => - Object.keys(source).every(key => obj.hasOwnProperty(key) && obj[key] === source[key]); -const matchesWith = (obj, source, fn) => - Object.keys(source).every( - key => - obj.hasOwnProperty(key) && fn - ? fn(obj[key], source[key], key, obj, source) - : obj[key] == source[key] - ); -const maxBy = (arr, fn) => Math.max(...arr.map(typeof fn === 'function' ? fn : val => val[fn])); -const maxDate = (...dates) => new Date(Math.max.apply(null, ...dates)); -const maxN = (arr, n = 1) => [...arr].sort((a, b) => b - a).slice(0, n); -const median = arr => { - const mid = Math.floor(arr.length / 2), - nums = [...arr].sort((a, b) => a - b); - return arr.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2; -}; -const memoize = fn => { - const cache = new Map(); - const cached = function(val) { - return cache.has(val) ? cache.get(val) : cache.set(val, fn.call(this, val)) && cache.get(val); - }; - cached.cache = cache; - return cached; -}; -const merge = (...objs) => - [...objs].reduce( - (acc, obj) => - Object.keys(obj).reduce((a, k) => { - acc[k] = acc.hasOwnProperty(k) ? [].concat(acc[k]).concat(obj[k]) : obj[k]; - return acc; - }, {}), - {} - ); -const midpoint = ([x1, y1], [x2, y2]) => [(x1 + x2) / 2, (y1 + y2) / 2]; -const minBy = (arr, fn) => Math.min(...arr.map(typeof fn === 'function' ? fn : val => val[fn])); -const minDate = (...dates) => new Date(Math.min.apply(null, ...dates)); -const minN = (arr, n = 1) => [...arr].sort((a, b) => a - b).slice(0, n); -const mostPerformant = (fns, iterations = 10000) => { - const times = fns.map(fn => { - const before = performance.now(); - for (let i = 0; i < iterations; i++) fn(); - return performance.now() - before; - }); - return times.indexOf(Math.min(...times)); -}; -const negate = func => (...args) => !func(...args); -const nest = (items, id = null, link = 'parent_id') => - items - .filter(item => item[link] === id) - .map(item => ({ ...item, children: nest(items, item.id) })); -const nodeListToArray = nodeList => [...nodeList]; -const none = (arr, fn = Boolean) => !arr.some(fn); -const nthArg = n => (...args) => args.slice(n)[0]; -const nthElement = (arr, n = 0) => (n === -1 ? arr.slice(n) : arr.slice(n, n + 1))[0]; -const objectFromPairs = arr => arr.reduce((a, [key, val]) => ((a[key] = val), a), {}); -const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]); -const observeMutations = (element, callback, options) => { - const observer = new MutationObserver(mutations => mutations.forEach(m => callback(m))); - observer.observe( - element, - Object.assign( - { - childList: true, - attributes: true, - attributeOldValue: true, - characterData: true, - characterDataOldValue: true, - subtree: true - }, - options - ) - ); - return observer; -}; -const off = (el, evt, fn, opts = false) => el.removeEventListener(evt, fn, opts); -const offset = (arr, offset) => [...arr.slice(offset), ...arr.slice(0, offset)]; -const omit = (obj, arr) => - Object.keys(obj) - .filter(k => !arr.includes(k)) - .reduce((acc, key) => ((acc[key] = obj[key]), acc), {}); -const omitBy = (obj, fn) => - Object.keys(obj) - .filter(k => !fn(obj[k], k)) - .reduce((acc, key) => ((acc[key] = obj[key]), acc), {}); -const on = (el, evt, fn, opts = {}) => { - const delegatorFn = e => e.target.matches(opts.target) && fn.call(e.target, e); - el.addEventListener(evt, opts.target ? delegatorFn : fn, opts.options || false); - if (opts.target) return delegatorFn; -}; -const once = fn => { - let called = false; - return function(...args) { - if (called) return; - called = true; - return fn.apply(this, args); - }; -}; -const onUserInputChange = callback => { - let type = 'mouse', - lastTime = 0; - const mousemoveHandler = () => { - const now = performance.now(); - if (now - lastTime < 20) - (type = 'mouse'), callback(type), document.removeEventListener('mousemove', mousemoveHandler); - lastTime = now; - }; - document.addEventListener('touchstart', () => { - if (type === 'touch') return; - (type = 'touch'), callback(type), document.addEventListener('mousemove', mousemoveHandler); - }); -}; -const orderBy = (arr, props, orders) => - [...arr].sort((a, b) => - props.reduce((acc, prop, i) => { - if (acc === 0) { - const [p1, p2] = orders && orders[i] === 'desc' ? [b[prop], a[prop]] : [a[prop], b[prop]]; - acc = p1 > p2 ? 1 : p1 < p2 ? -1 : 0; - } - return acc; - }, 0) - ); -const over = (...fns) => (...args) => fns.map(fn => fn.apply(null, args)); -const overArgs = (fn, transforms) => (...args) => fn(...args.map((val, i) => transforms[i](val))); -const pad = (str, length, char = ' ') => - str.padStart((str.length + length) / 2, char).padEnd(length, char); -const palindrome = str => { - const s = str.toLowerCase().replace(/[\W_]/g, ''); - return s === [...s].reverse().join(''); -}; -const parseCookie = str => - str - .split(';') - .map(v => v.split('=')) - .reduce((acc, v) => { - acc[decodeURIComponent(v[0].trim())] = decodeURIComponent(v[1].trim()); - return acc; - }, {}); -const partial = (fn, ...partials) => (...args) => fn(...partials, ...args); -const partialRight = (fn, ...partials) => (...args) => fn(...args, ...partials); -const partition = (arr, fn) => - arr.reduce( - (acc, val, i, arr) => { - acc[fn(val, i, arr) ? 0 : 1].push(val); - return acc; - }, - [[], []] - ); -const percentile = (arr, val) => - (100 * arr.reduce((acc, v) => acc + (v < val ? 1 : 0) + (v === val ? 0.5 : 0), 0)) / arr.length; -const permutations = arr => { - if (arr.length <= 2) return arr.length === 2 ? [arr, [arr[1], arr[0]]] : arr; - return arr.reduce( - (acc, item, i) => - acc.concat( - permutations([...arr.slice(0, i), ...arr.slice(i + 1)]).map(val => [item, ...val]) - ), - [] - ); -}; -const pick = (obj, arr) => - arr.reduce((acc, curr) => (curr in obj && (acc[curr] = obj[curr]), acc), {}); -const pickBy = (obj, fn) => - Object.keys(obj) - .filter(k => fn(obj[k], k)) - .reduce((acc, key) => ((acc[key] = obj[key]), acc), {}); -const pipeAsyncFunctions = (...fns) => arg => fns.reduce((p, f) => p.then(f), Promise.resolve(arg)); -const pipeFunctions = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args))); -const pluralize = (val, word, plural = word + 's') => { - const _pluralize = (num, word, plural = word + 's') => - [1, -1].includes(Number(num)) ? word : plural; - if (typeof val === 'object') return (num, word) => _pluralize(num, word, val[word]); - return _pluralize(val, word, plural); -}; -const powerset = arr => arr.reduce((a, v) => a.concat(a.map(r => [v].concat(r))), [[]]); -const prefix = prop => { - const capitalizedProp = prop.charAt(0).toUpperCase() + prop.slice(1); - const prefixes = ['', 'webkit', 'moz', 'ms', 'o']; - const i = prefixes.findIndex( - prefix => typeof document.body.style[prefix ? prefix + capitalizedProp : prop] !== 'undefined' - ); - return i !== -1 ? (i === 0 ? prop : prefixes[i] + capitalizedProp) : null; -}; -const prettyBytes = (num, precision = 3, addSpace = true) => { - const UNITS = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']; - if (Math.abs(num) < 1) return num + (addSpace ? ' ' : '') + UNITS[0]; - const exponent = Math.min(Math.floor(Math.log10(num < 0 ? -num : num) / 3), UNITS.length - 1); - const n = Number(((num < 0 ? -num : num) / 1000 ** exponent).toPrecision(precision)); - return (num < 0 ? '-' : '') + n + (addSpace ? ' ' : '') + UNITS[exponent]; -}; -const primes = num => { - let arr = Array.from({ length: num - 1 }).map((x, i) => i + 2), - sqroot = Math.floor(Math.sqrt(num)), - numsTillSqroot = Array.from({ length: sqroot - 1 }).map((x, i) => i + 2); - numsTillSqroot.forEach(x => (arr = arr.filter(y => y % x !== 0 || y === x))); - return arr; -}; -const promisify = func => (...args) => - new Promise((resolve, reject) => - func(...args, (err, result) => (err ? reject(err) : resolve(result))) - ); -const pull = (arr, ...args) => { - let argState = Array.isArray(args[0]) ? args[0] : args; - let pulled = arr.filter((v, i) => !argState.includes(v)); - arr.length = 0; - pulled.forEach(v => arr.push(v)); -}; -const pullAtIndex = (arr, pullArr) => { - let removed = []; - let pulled = arr - .map((v, i) => (pullArr.includes(i) ? removed.push(v) : v)) - .filter((v, i) => !pullArr.includes(i)); - arr.length = 0; - pulled.forEach(v => arr.push(v)); - return removed; -}; -const pullAtValue = (arr, pullArr) => { - let removed = [], - pushToRemove = arr.forEach((v, i) => (pullArr.includes(v) ? removed.push(v) : v)), - mutateTo = arr.filter((v, i) => !pullArr.includes(v)); - arr.length = 0; - mutateTo.forEach(v => arr.push(v)); - return removed; -}; -const pullBy = (arr, ...args) => { - const length = args.length; - let fn = length > 1 ? args[length - 1] : undefined; - fn = typeof fn == 'function' ? (args.pop(), fn) : undefined; - let argState = (Array.isArray(args[0]) ? args[0] : args).map(val => fn(val)); - let pulled = arr.filter((v, i) => !argState.includes(fn(v))); - arr.length = 0; - pulled.forEach(v => arr.push(v)); -}; -const radsToDegrees = rad => (rad * 180.0) / Math.PI; -const randomHexColorCode = () => { - let n = (Math.random() * 0xfffff * 1000000).toString(16); - return '#' + n.slice(0, 6); -}; -const randomIntArrayInRange = (min, max, n = 1) => - Array.from({ length: n }, () => Math.floor(Math.random() * (max - min + 1)) + min); -const randomIntegerInRange = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min; -const randomNumberInRange = (min, max) => Math.random() * (max - min) + min; - -const readFileLines = filename => - fs - .readFileSync(filename) - .toString('UTF8') - .split('\n'); -const rearg = (fn, indexes) => (...args) => fn(...indexes.map(i => args[i])); -const recordAnimationFrames = (callback, autoStart = true) => { - let running = true, - raf; - const stop = () => { - running = false; - cancelAnimationFrame(raf); - }; - const start = () => { - running = true; - run(); - }; - const run = () => { - raf = requestAnimationFrame(() => { - callback(); - if (running) run(); - }); - }; - if (autoStart) start(); - return { start, stop }; -}; -const redirect = (url, asLink = true) => - asLink ? (window.location.href = url) : window.location.replace(url); -const reducedFilter = (data, keys, fn) => - data.filter(fn).map(el => - keys.reduce((acc, key) => { - acc[key] = el[key]; - return acc; - }, {}) - ); -const reduceSuccessive = (arr, fn, acc) => - arr.reduce((res, val, i, arr) => (res.push(fn(res.slice(-1)[0], val, i, arr)), res), [acc]); -const reduceWhich = (arr, comparator = (a, b) => a - b) => - arr.reduce((a, b) => (comparator(a, b) >= 0 ? b : a)); -const reject = (pred, array) => array.filter((...args) => !pred(...args)); -const remove = (arr, func) => - Array.isArray(arr) - ? arr.filter(func).reduce((acc, val) => { - arr.splice(arr.indexOf(val), 1); - return acc.concat(val); - }, []) - : []; -const removeNonASCII = str => str.replace(/[^\x20-\x7E]/g, ''); -const renameKeys = (keysMap, obj) => - Object.keys(obj).reduce( - (acc, key) => ({ - ...acc, - ...{ [keysMap[key] || key]: obj[key] } - }), - {} - ); -const reverseString = str => [...str].reverse().join(''); -const RGBToHex = (r, g, b) => ((r << 16) + (g << 8) + b).toString(16).padStart(6, '0'); -const round = (n, decimals = 0) => Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`); -const runAsync = fn => { - const worker = new Worker( - URL.createObjectURL(new Blob([`postMessage((${fn})());`]), { - type: 'application/javascript; charset=utf-8' - }) - ); - return new Promise((res, rej) => { - worker.onmessage = ({ data }) => { - res(data), worker.terminate(); - }; - worker.onerror = err => { - rej(err), worker.terminate(); - }; - }); -}; -const runPromisesInSeries = ps => ps.reduce((p, next) => p.then(next), Promise.resolve()); -const sample = arr => arr[Math.floor(Math.random() * arr.length)]; -const sampleSize = ([...arr], n = 1) => { - let m = arr.length; - while (m) { - const i = Math.floor(Math.random() * m--); - [arr[m], arr[i]] = [arr[i], arr[m]]; - } - return arr.slice(0, n); -}; -const scrollToTop = () => { - const c = document.documentElement.scrollTop || document.body.scrollTop; - if (c > 0) { - window.requestAnimationFrame(scrollToTop); - window.scrollTo(0, c - c / 8); - } -}; -const sdbm = str => { - let arr = str.split(''); - return arr.reduce( - (hashCode, currentVal) => - (hashCode = currentVal.charCodeAt(0) + (hashCode << 6) + (hashCode << 16) - hashCode), - 0 - ); -}; -const serializeCookie = (name, val) => `${encodeURIComponent(name)}=${encodeURIComponent(val)}`; -const serializeForm = form => - Array.from(new FormData(form), field => field.map(encodeURIComponent).join('=')).join('&'); -const setStyle = (el, ruleName, val) => (el.style[ruleName] = val); -const shallowClone = obj => Object.assign({}, obj); -const shank = (arr, index = 0, delCount = 0, ...elements) => - arr - .slice(0, index) - .concat(elements) - .concat(arr.slice(index + delCount)); -const show = (...el) => [...el].forEach(e => (e.style.display = '')); -const shuffle = ([...arr]) => { - let m = arr.length; - while (m) { - const i = Math.floor(Math.random() * m--); - [arr[m], arr[i]] = [arr[i], arr[m]]; - } - return arr; -}; -const similarity = (arr, values) => arr.filter(v => values.includes(v)); -const size = val => - Array.isArray(val) - ? val.length - : val && typeof val === 'object' - ? val.size || val.length || Object.keys(val).length - : typeof val === 'string' - ? new Blob([val]).size - : 0; -const sleep = ms => new Promise(resolve => setTimeout(resolve, ms)); -const smoothScroll = element => - document.querySelector(element).scrollIntoView({ - behavior: 'smooth' - }); -const sortCharactersInString = str => [...str].sort((a, b) => a.localeCompare(b)).join(''); -const sortedIndex = (arr, n) => { - const isDescending = arr[0] > arr[arr.length - 1]; - const index = arr.findIndex(el => (isDescending ? n >= el : n <= el)); - return index === -1 ? arr.length : index; -}; -const sortedIndexBy = (arr, n, fn) => { - const isDescending = fn(arr[0]) > fn(arr[arr.length - 1]); - const val = fn(n); - const index = arr.findIndex(el => (isDescending ? val >= fn(el) : val <= fn(el))); - return index === -1 ? arr.length : index; -}; -const sortedLastIndex = (arr, n) => { - const isDescending = arr[0] > arr[arr.length - 1]; - const index = arr.reverse().findIndex(el => (isDescending ? n <= el : n >= el)); - return index === -1 ? 0 : arr.length - index; -}; -const sortedLastIndexBy = (arr, n, fn) => { - const isDescending = fn(arr[0]) > fn(arr[arr.length - 1]); - const val = fn(n); - const index = arr - .map(fn) - .reverse() - .findIndex(el => (isDescending ? val <= el : val >= el)); - return index === -1 ? 0 : arr.length - index; -}; -const splitLines = str => str.split(/\r?\n/); +const forEachRight = (arr, callback) => + arr + .slice(0) + .reverse() + .forEach(callback); +const forOwn = (obj, fn) => Object.keys(obj).forEach(key => fn(obj[key], key, obj)); +const forOwnRight = (obj, fn) => + Object.keys(obj) + .reverse() + .forEach(key => fn(obj[key], key, obj)); +const formToObject = form => + Array.from(new FormData(form)).reduce( + (acc, [key, value]) => ({ + ...acc, + [key]: value + }), + {} + ); +const formatDuration = ms => { + if (ms < 0) ms = -ms; + const time = { + day: Math.floor(ms / 86400000), + hour: Math.floor(ms / 3600000) % 24, + minute: Math.floor(ms / 60000) % 60, + second: Math.floor(ms / 1000) % 60, + millisecond: Math.floor(ms) % 1000 + }; + return Object.entries(time) + .filter(val => val[1] !== 0) + .map(([key, val]) => `${val} ${key}${val !== 1 ? 's' : ''}`) + .join(', '); +}; +const fromCamelCase = (str, separator = '_') => + str + .replace(/([a-z\d])([A-Z])/g, '$1' + separator + '$2') + .replace(/([A-Z]+)([A-Z][a-z\d]+)/g, '$1' + separator + '$2') + .toLowerCase(); +const functionName = fn => (console.debug(fn.name), fn); +const functions = (obj, inherited = false) => + (inherited + ? [...Object.keys(obj), ...Object.keys(Object.getPrototypeOf(obj))] + : Object.keys(obj) + ).filter(key => typeof obj[key] === 'function'); +const gcd = (...arr) => { + const _gcd = (x, y) => (!y ? x : gcd(y, x % y)); + return [...arr].reduce((a, b) => _gcd(a, b)); +}; +const geometricProgression = (end, start = 1, step = 2) => + Array.from({ length: Math.floor(Math.log(end / start) / Math.log(step)) + 1 }).map( + (v, i) => start * step ** i + ); +const get = (from, ...selectors) => + [...selectors].map(s => + s + .replace(/\[([^\[\]]*)\]/g, '.$1.') + .split('.') + .filter(t => t !== '') + .reduce((prev, cur) => prev && prev[cur], from) + ); +const getColonTimeFromDate = date => date.toTimeString().slice(0, 8); +const getDaysDiffBetweenDates = (dateInitial, dateFinal) => + (dateFinal - dateInitial) / (1000 * 3600 * 24); +const getImages = (el, includeDuplicates = false) => { + const images = [...el.getElementsByTagName('img')].map(img => img.getAttribute('src')); + return includeDuplicates ? images : [...new Set(images)]; +}; +const getMeridiemSuffixOfInteger = num => + num === 0 || num === 24 + ? 12 + 'am' + : num === 12 + ? 12 + 'pm' + : num < 12 + ? (num % 12) + 'am' + : (num % 12) + 'pm'; +const getScrollPosition = (el = window) => ({ + x: el.pageXOffset !== undefined ? el.pageXOffset : el.scrollLeft, + y: el.pageYOffset !== undefined ? el.pageYOffset : el.scrollTop +}); +const getStyle = (el, ruleName) => getComputedStyle(el)[ruleName]; +const getType = v => + v === undefined ? 'undefined' : v === null ? 'null' : v.constructor.name.toLowerCase(); +const getURLParameters = url => + (url.match(/([^?=&]+)(=([^&]*))/g) || []).reduce( + (a, v) => ((a[v.slice(0, v.indexOf('='))] = v.slice(v.indexOf('=') + 1)), a), + {} + ); +const groupBy = (arr, fn) => + arr.map(typeof fn === 'function' ? fn : val => val[fn]).reduce((acc, val, i) => { + acc[val] = (acc[val] || []).concat(arr[i]); + return acc; + }, {}); +const hammingDistance = (num1, num2) => ((num1 ^ num2).toString(2).match(/1/g) || '').length; +const hasClass = (el, className) => el.classList.contains(className); +const hasFlags = (...flags) => + flags.every(flag => process.argv.includes(/^-{1,2}/.test(flag) ? flag : '--' + flag)); +const hashBrowser = val => + crypto.subtle.digest('SHA-256', new TextEncoder('utf-8').encode(val)).then(h => { + let hexes = [], + view = new DataView(h); + for (let i = 0; i < view.byteLength; i += 4) + hexes.push(('00000000' + view.getUint32(i).toString(16)).slice(-8)); + return hexes.join(''); + }); + +const hashNode = val => + new Promise(resolve => + setTimeout( + () => + resolve( + crypto + .createHash('sha256') + .update(val) + .digest('hex') + ), + 0 + ) + ); +const head = arr => arr[0]; +const hexToRGB = hex => { + let alpha = false, + h = hex.slice(hex.startsWith('#') ? 1 : 0); + if (h.length === 3) h = [...h].map(x => x + x).join(''); + else if (h.length === 8) alpha = true; + h = parseInt(h, 16); + return ( + 'rgb' + + (alpha ? 'a' : '') + + '(' + + (h >>> (alpha ? 24 : 16)) + + ', ' + + ((h & (alpha ? 0x00ff0000 : 0x00ff00)) >>> (alpha ? 16 : 8)) + + ', ' + + ((h & (alpha ? 0x0000ff00 : 0x0000ff)) >>> (alpha ? 8 : 0)) + + (alpha ? `, ${h & 0x000000ff}` : '') + + ')' + ); +}; +const hide = (...el) => [...el].forEach(e => (e.style.display = 'none')); +const httpGet = (url, callback, err = console.error) => { + const request = new XMLHttpRequest(); + request.open('GET', url, true); + request.onload = () => callback(request.responseText); + request.onerror = () => err(request); + request.send(); +}; +const httpPost = (url, data, callback, err = console.error) => { + const request = new XMLHttpRequest(); + request.open('POST', url, true); + request.setRequestHeader('Content-type', 'application/json; charset=utf-8'); + request.onload = () => callback(request.responseText); + request.onerror = () => err(request); + request.send(data); +}; +const httpsRedirect = () => { + if (location.protocol !== 'https:') location.replace('https://' + location.href.split('//')[1]); +}; +const hz = (fn, iterations = 100) => { + const before = performance.now(); + for (let i = 0; i < iterations; i++) fn(); + return (1000 * iterations) / (performance.now() - before); +}; +const inRange = (n, start, end = null) => { + if (end && start > end) [end, start] = [start, end]; + return end == null ? n >= 0 && n < start : n >= start && n < end; +}; +const indentString = (str, count, indent = ' ') => str.replace(/^/gm, indent.repeat(count)); +const indexOfAll = (arr, val) => arr.reduce((acc, el, i) => (el === val ? [...acc, i] : acc), []); +const initial = arr => arr.slice(0, -1); +const initialize2DArray = (w, h, val = null) => + Array.from({ length: h }).map(() => Array.from({ length: w }).fill(val)); +const initializeArrayWithRange = (end, start = 0, step = 1) => + Array.from({ length: Math.ceil((end - start + 1) / step) }, (v, i) => i * step + start); +const initializeArrayWithRangeRight = (end, start = 0, step = 1) => + Array.from({ length: Math.ceil((end + 1 - start) / step) }).map( + (v, i, arr) => (arr.length - i - 1) * step + start + ); +const initializeArrayWithValues = (n, val = 0) => Array(n).fill(val); +const initializeNDArray = (val, ...args) => + args.length === 0 + ? val + : Array.from({ length: args[0] }).map(() => initializeNDArray(val, ...args.slice(1))); +const insertAfter = (el, htmlString) => el.insertAdjacentHTML('afterend', htmlString); +const insertBefore = (el, htmlString) => el.insertAdjacentHTML('beforebegin', htmlString); +const intersection = (a, b) => { + const s = new Set(b); + return a.filter(x => s.has(x)); +}; +const intersectionBy = (a, b, fn) => { + const s = new Set(b.map(fn)); + return a.filter(x => s.has(fn(x))); +}; +const intersectionWith = (a, b, comp) => a.filter(x => b.findIndex(y => comp(x, y)) !== -1); +const invertKeyValues = (obj, fn) => + Object.keys(obj).reduce((acc, key) => { + const val = fn ? fn(obj[key]) : obj[key]; + acc[val] = acc[val] || []; + acc[val].push(key); + return acc; + }, {}); +const is = (type, val) => ![, null].includes(val) && val.constructor === type; +const isAbsoluteURL = str => /^[a-z][a-z0-9+.-]*:/.test(str); +const isAfterDate = (dateA, dateB) => dateA > dateB; +const isAnagram = (str1, str2) => { + const normalize = str => + str + .toLowerCase() + .replace(/[^a-z0-9]/gi, '') + .split('') + .sort() + .join(''); + return normalize(str1) === normalize(str2); +}; +const isArrayLike = obj => obj != null && typeof obj[Symbol.iterator] === 'function'; +const isBeforeDate = (dateA, dateB) => dateA < dateB; +const isBoolean = val => typeof val === 'boolean'; +const isBrowser = () => ![typeof window, typeof document].includes('undefined'); +const isBrowserTabFocused = () => !document.hidden; +const isDivisible = (dividend, divisor) => dividend % divisor === 0; +const isDuplexStream = val => + val !== null && + typeof val === 'object' && + typeof val.pipe === 'function' && + typeof val._read === 'function' && + typeof val._readableState === 'object' && + typeof val._write === 'function' && + typeof val._writableState === 'object'; +const isEmpty = val => val == null || !(Object.keys(val) || val).length; +const isEven = num => num % 2 === 0; +const isFunction = val => typeof val === 'function'; +const isLowerCase = str => str === str.toLowerCase(); +const isNegativeZero = val => val === 0 && 1 / val === -Infinity; +const isNil = val => val === undefined || val === null; +const isNull = val => val === null; +const isNumber = val => typeof val === 'number' && val === val; +const isObject = obj => obj === Object(obj); +const isObjectLike = val => val !== null && typeof val === 'object'; +const isPlainObject = val => !!val && typeof val === 'object' && val.constructor === Object; +const isPrime = num => { + const boundary = Math.floor(Math.sqrt(num)); + for (var i = 2; i <= boundary; i++) if (num % i === 0) return false; + return num >= 2; +}; +const isPrimitive = val => Object(val) !== val; +const isPromiseLike = obj => + obj !== null && + (typeof obj === 'object' || typeof obj === 'function') && + typeof obj.then === 'function'; +const isReadableStream = val => + val !== null && + typeof val === 'object' && + typeof val.pipe === 'function' && + typeof val._read === 'function' && + typeof val._readableState === 'object'; +const isSameDate = (dateA, dateB) => dateA.toISOString() === dateB.toISOString(); +const isSorted = arr => { + let direction = -(arr[0] - arr[1]); + for (let [i, val] of arr.entries()) { + direction = !direction ? -(arr[i - 1] - arr[i]) : direction; + if (i === arr.length - 1) return !direction ? 0 : direction; + else if ((val - arr[i + 1]) * direction > 0) return 0; + } +}; +const isStream = val => val !== null && typeof val === 'object' && typeof val.pipe === 'function'; +const isString = val => typeof val === 'string'; +const isSymbol = val => typeof val === 'symbol'; +const isTravisCI = () => 'TRAVIS' in process.env && 'CI' in process.env; +const isUndefined = val => val === undefined; +const isUpperCase = str => str === str.toUpperCase(); +const isValidJSON = str => { + try { + JSON.parse(str); + return true; + } catch (e) { + return false; + } +}; +const isWritableStream = val => + val !== null && + typeof val === 'object' && + typeof val.pipe === 'function' && + typeof val._write === 'function' && + typeof val._writableState === 'object'; +const join = (arr, separator = ',', end = separator) => + arr.reduce( + (acc, val, i) => + i === arr.length - 2 + ? acc + val + end + : i === arr.length - 1 + ? acc + val + : acc + val + separator, + '' + ); +const last = arr => arr[arr.length - 1]; +const lcm = (...arr) => { + const gcd = (x, y) => (!y ? x : gcd(y, x % y)); + const _lcm = (x, y) => (x * y) / gcd(x, y); + return [...arr].reduce((a, b) => _lcm(a, b)); +}; +const longestItem = (...vals) => vals.reduce((a, x) => (x.length > a.length ? x : a)); +const lowercaseKeys = obj => + Object.keys(obj).reduce((acc, key) => { + acc[key.toLowerCase()] = obj[key]; + return acc; + }, {}); +const luhnCheck = num => { + let arr = (num + '') + .split('') + .reverse() + .map(x => parseInt(x)); + let lastDigit = arr.splice(0, 1)[0]; + let sum = arr.reduce((acc, val, i) => (i % 2 !== 0 ? acc + val : acc + ((val * 2) % 9) || 9), 0); + sum += lastDigit; + return sum % 10 === 0; +}; +const mapKeys = (obj, fn) => + Object.keys(obj).reduce((acc, k) => { + acc[fn(obj[k], k, obj)] = obj[k]; + return acc; + }, {}); +const mapNumRange = (num, inMin, inMax, outMin, outMax) => + ((num - inMin) * (outMax - outMin)) / (inMax - inMin) + outMin; +const mapObject = (arr, fn) => + (a => ( + (a = [arr, arr.map(fn)]), a[0].reduce((acc, val, ind) => ((acc[val] = a[1][ind]), acc), {}) + ))(); +const mapString = (str, fn) => + str + .split('') + .map((c, i) => fn(c, i, str)) + .join(''); +const mapValues = (obj, fn) => + Object.keys(obj).reduce((acc, k) => { + acc[k] = fn(obj[k], k, obj); + return acc; + }, {}); +const mask = (cc, num = 4, mask = '*') => `${cc}`.slice(-num).padStart(`${cc}`.length, mask); +const matches = (obj, source) => + Object.keys(source).every(key => obj.hasOwnProperty(key) && obj[key] === source[key]); +const matchesWith = (obj, source, fn) => + Object.keys(source).every( + key => + obj.hasOwnProperty(key) && fn + ? fn(obj[key], source[key], key, obj, source) + : obj[key] == source[key] + ); +const maxBy = (arr, fn) => Math.max(...arr.map(typeof fn === 'function' ? fn : val => val[fn])); +const maxDate = (...dates) => new Date(Math.max.apply(null, ...dates)); +const maxN = (arr, n = 1) => [...arr].sort((a, b) => b - a).slice(0, n); +const median = arr => { + const mid = Math.floor(arr.length / 2), + nums = [...arr].sort((a, b) => a - b); + return arr.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2; +}; +const memoize = fn => { + const cache = new Map(); + const cached = function(val) { + return cache.has(val) ? cache.get(val) : cache.set(val, fn.call(this, val)) && cache.get(val); + }; + cached.cache = cache; + return cached; +}; +const merge = (...objs) => + [...objs].reduce( + (acc, obj) => + Object.keys(obj).reduce((a, k) => { + acc[k] = acc.hasOwnProperty(k) ? [].concat(acc[k]).concat(obj[k]) : obj[k]; + return acc; + }, {}), + {} + ); +const midpoint = ([x1, y1], [x2, y2]) => [(x1 + x2) / 2, (y1 + y2) / 2]; +const minBy = (arr, fn) => Math.min(...arr.map(typeof fn === 'function' ? fn : val => val[fn])); +const minDate = (...dates) => new Date(Math.min.apply(null, ...dates)); +const minN = (arr, n = 1) => [...arr].sort((a, b) => a - b).slice(0, n); +const mostPerformant = (fns, iterations = 10000) => { + const times = fns.map(fn => { + const before = performance.now(); + for (let i = 0; i < iterations; i++) fn(); + return performance.now() - before; + }); + return times.indexOf(Math.min(...times)); +}; +const negate = func => (...args) => !func(...args); +const nest = (items, id = null, link = 'parent_id') => + items + .filter(item => item[link] === id) + .map(item => ({ ...item, children: nest(items, item.id) })); +const nodeListToArray = nodeList => [...nodeList]; +const none = (arr, fn = Boolean) => !arr.some(fn); +const nthArg = n => (...args) => args.slice(n)[0]; +const nthElement = (arr, n = 0) => (n === -1 ? arr.slice(n) : arr.slice(n, n + 1))[0]; +const objectFromPairs = arr => arr.reduce((a, [key, val]) => ((a[key] = val), a), {}); +const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]); +const observeMutations = (element, callback, options) => { + const observer = new MutationObserver(mutations => mutations.forEach(m => callback(m))); + observer.observe( + element, + Object.assign( + { + childList: true, + attributes: true, + attributeOldValue: true, + characterData: true, + characterDataOldValue: true, + subtree: true + }, + options + ) + ); + return observer; +}; +const off = (el, evt, fn, opts = false) => el.removeEventListener(evt, fn, opts); +const offset = (arr, offset) => [...arr.slice(offset), ...arr.slice(0, offset)]; +const omit = (obj, arr) => + Object.keys(obj) + .filter(k => !arr.includes(k)) + .reduce((acc, key) => ((acc[key] = obj[key]), acc), {}); +const omitBy = (obj, fn) => + Object.keys(obj) + .filter(k => !fn(obj[k], k)) + .reduce((acc, key) => ((acc[key] = obj[key]), acc), {}); +const on = (el, evt, fn, opts = {}) => { + const delegatorFn = e => e.target.matches(opts.target) && fn.call(e.target, e); + el.addEventListener(evt, opts.target ? delegatorFn : fn, opts.options || false); + if (opts.target) return delegatorFn; +}; +const onUserInputChange = callback => { + let type = 'mouse', + lastTime = 0; + const mousemoveHandler = () => { + const now = performance.now(); + if (now - lastTime < 20) + (type = 'mouse'), callback(type), document.removeEventListener('mousemove', mousemoveHandler); + lastTime = now; + }; + document.addEventListener('touchstart', () => { + if (type === 'touch') return; + (type = 'touch'), callback(type), document.addEventListener('mousemove', mousemoveHandler); + }); +}; +const once = fn => { + let called = false; + return function(...args) { + if (called) return; + called = true; + return fn.apply(this, args); + }; +}; +const orderBy = (arr, props, orders) => + [...arr].sort((a, b) => + props.reduce((acc, prop, i) => { + if (acc === 0) { + const [p1, p2] = orders && orders[i] === 'desc' ? [b[prop], a[prop]] : [a[prop], b[prop]]; + acc = p1 > p2 ? 1 : p1 < p2 ? -1 : 0; + } + return acc; + }, 0) + ); +const over = (...fns) => (...args) => fns.map(fn => fn.apply(null, args)); +const overArgs = (fn, transforms) => (...args) => fn(...args.map((val, i) => transforms[i](val))); +const pad = (str, length, char = ' ') => + str.padStart((str.length + length) / 2, char).padEnd(length, char); +const palindrome = str => { + const s = str.toLowerCase().replace(/[\W_]/g, ''); + return s === [...s].reverse().join(''); +}; +const parseCookie = str => + str + .split(';') + .map(v => v.split('=')) + .reduce((acc, v) => { + acc[decodeURIComponent(v[0].trim())] = decodeURIComponent(v[1].trim()); + return acc; + }, {}); +const partial = (fn, ...partials) => (...args) => fn(...partials, ...args); +const partialRight = (fn, ...partials) => (...args) => fn(...args, ...partials); +const partition = (arr, fn) => + arr.reduce( + (acc, val, i, arr) => { + acc[fn(val, i, arr) ? 0 : 1].push(val); + return acc; + }, + [[], []] + ); +const percentile = (arr, val) => + (100 * arr.reduce((acc, v) => acc + (v < val ? 1 : 0) + (v === val ? 0.5 : 0), 0)) / arr.length; +const permutations = arr => { + if (arr.length <= 2) return arr.length === 2 ? [arr, [arr[1], arr[0]]] : arr; + return arr.reduce( + (acc, item, i) => + acc.concat( + permutations([...arr.slice(0, i), ...arr.slice(i + 1)]).map(val => [item, ...val]) + ), + [] + ); +}; +const pick = (obj, arr) => + arr.reduce((acc, curr) => (curr in obj && (acc[curr] = obj[curr]), acc), {}); +const pickBy = (obj, fn) => + Object.keys(obj) + .filter(k => fn(obj[k], k)) + .reduce((acc, key) => ((acc[key] = obj[key]), acc), {}); +const pipeAsyncFunctions = (...fns) => arg => fns.reduce((p, f) => p.then(f), Promise.resolve(arg)); +const pipeFunctions = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args))); +const pluralize = (val, word, plural = word + 's') => { + const _pluralize = (num, word, plural = word + 's') => + [1, -1].includes(Number(num)) ? word : plural; + if (typeof val === 'object') return (num, word) => _pluralize(num, word, val[word]); + return _pluralize(val, word, plural); +}; +const powerset = arr => arr.reduce((a, v) => a.concat(a.map(r => [v].concat(r))), [[]]); +const prefix = prop => { + const capitalizedProp = prop.charAt(0).toUpperCase() + prop.slice(1); + const prefixes = ['', 'webkit', 'moz', 'ms', 'o']; + const i = prefixes.findIndex( + prefix => typeof document.body.style[prefix ? prefix + capitalizedProp : prop] !== 'undefined' + ); + return i !== -1 ? (i === 0 ? prop : prefixes[i] + capitalizedProp) : null; +}; +const prettyBytes = (num, precision = 3, addSpace = true) => { + const UNITS = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']; + if (Math.abs(num) < 1) return num + (addSpace ? ' ' : '') + UNITS[0]; + const exponent = Math.min(Math.floor(Math.log10(num < 0 ? -num : num) / 3), UNITS.length - 1); + const n = Number(((num < 0 ? -num : num) / 1000 ** exponent).toPrecision(precision)); + return (num < 0 ? '-' : '') + n + (addSpace ? ' ' : '') + UNITS[exponent]; +}; +const primes = num => { + let arr = Array.from({ length: num - 1 }).map((x, i) => i + 2), + sqroot = Math.floor(Math.sqrt(num)), + numsTillSqroot = Array.from({ length: sqroot - 1 }).map((x, i) => i + 2); + numsTillSqroot.forEach(x => (arr = arr.filter(y => y % x !== 0 || y === x))); + return arr; +}; +const promisify = func => (...args) => + new Promise((resolve, reject) => + func(...args, (err, result) => (err ? reject(err) : resolve(result))) + ); +const pull = (arr, ...args) => { + let argState = Array.isArray(args[0]) ? args[0] : args; + let pulled = arr.filter((v, i) => !argState.includes(v)); + arr.length = 0; + pulled.forEach(v => arr.push(v)); +}; +const pullAtIndex = (arr, pullArr) => { + let removed = []; + let pulled = arr + .map((v, i) => (pullArr.includes(i) ? removed.push(v) : v)) + .filter((v, i) => !pullArr.includes(i)); + arr.length = 0; + pulled.forEach(v => arr.push(v)); + return removed; +}; +const pullAtValue = (arr, pullArr) => { + let removed = [], + pushToRemove = arr.forEach((v, i) => (pullArr.includes(v) ? removed.push(v) : v)), + mutateTo = arr.filter((v, i) => !pullArr.includes(v)); + arr.length = 0; + mutateTo.forEach(v => arr.push(v)); + return removed; +}; +const pullBy = (arr, ...args) => { + const length = args.length; + let fn = length > 1 ? args[length - 1] : undefined; + fn = typeof fn == 'function' ? (args.pop(), fn) : undefined; + let argState = (Array.isArray(args[0]) ? args[0] : args).map(val => fn(val)); + let pulled = arr.filter((v, i) => !argState.includes(fn(v))); + arr.length = 0; + pulled.forEach(v => arr.push(v)); +}; +const radsToDegrees = rad => (rad * 180.0) / Math.PI; +const randomHexColorCode = () => { + let n = (Math.random() * 0xfffff * 1000000).toString(16); + return '#' + n.slice(0, 6); +}; +const randomIntArrayInRange = (min, max, n = 1) => + Array.from({ length: n }, () => Math.floor(Math.random() * (max - min + 1)) + min); +const randomIntegerInRange = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min; +const randomNumberInRange = (min, max) => Math.random() * (max - min) + min; + +const readFileLines = filename => + fs + .readFileSync(filename) + .toString('UTF8') + .split('\n'); +const rearg = (fn, indexes) => (...args) => fn(...indexes.map(i => args[i])); +const recordAnimationFrames = (callback, autoStart = true) => { + let running = true, + raf; + const stop = () => { + running = false; + cancelAnimationFrame(raf); + }; + const start = () => { + running = true; + run(); + }; + const run = () => { + raf = requestAnimationFrame(() => { + callback(); + if (running) run(); + }); + }; + if (autoStart) start(); + return { start, stop }; +}; +const redirect = (url, asLink = true) => + asLink ? (window.location.href = url) : window.location.replace(url); +const reduceSuccessive = (arr, fn, acc) => + arr.reduce((res, val, i, arr) => (res.push(fn(res.slice(-1)[0], val, i, arr)), res), [acc]); +const reduceWhich = (arr, comparator = (a, b) => a - b) => + arr.reduce((a, b) => (comparator(a, b) >= 0 ? b : a)); +const reducedFilter = (data, keys, fn) => + data.filter(fn).map(el => + keys.reduce((acc, key) => { + acc[key] = el[key]; + return acc; + }, {}) + ); +const reject = (pred, array) => array.filter((...args) => !pred(...args)); +const remove = (arr, func) => + Array.isArray(arr) + ? arr.filter(func).reduce((acc, val) => { + arr.splice(arr.indexOf(val), 1); + return acc.concat(val); + }, []) + : []; +const removeNonASCII = str => str.replace(/[^\x20-\x7E]/g, ''); +const renameKeys = (keysMap, obj) => + Object.keys(obj).reduce( + (acc, key) => ({ + ...acc, + ...{ [keysMap[key] || key]: obj[key] } + }), + {} + ); +const reverseString = str => [...str].reverse().join(''); +const round = (n, decimals = 0) => Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`); +const runAsync = fn => { + const worker = new Worker( + URL.createObjectURL(new Blob([`postMessage((${fn})());`]), { + type: 'application/javascript; charset=utf-8' + }) + ); + return new Promise((res, rej) => { + worker.onmessage = ({ data }) => { + res(data), worker.terminate(); + }; + worker.onerror = err => { + rej(err), worker.terminate(); + }; + }); +}; +const runPromisesInSeries = ps => ps.reduce((p, next) => p.then(next), Promise.resolve()); +const sample = arr => arr[Math.floor(Math.random() * arr.length)]; +const sampleSize = ([...arr], n = 1) => { + let m = arr.length; + while (m) { + const i = Math.floor(Math.random() * m--); + [arr[m], arr[i]] = [arr[i], arr[m]]; + } + return arr.slice(0, n); +}; +const scrollToTop = () => { + const c = document.documentElement.scrollTop || document.body.scrollTop; + if (c > 0) { + window.requestAnimationFrame(scrollToTop); + window.scrollTo(0, c - c / 8); + } +}; +const sdbm = str => { + let arr = str.split(''); + return arr.reduce( + (hashCode, currentVal) => + (hashCode = currentVal.charCodeAt(0) + (hashCode << 6) + (hashCode << 16) - hashCode), + 0 + ); +}; +const serializeCookie = (name, val) => `${encodeURIComponent(name)}=${encodeURIComponent(val)}`; +const serializeForm = form => + Array.from(new FormData(form), field => field.map(encodeURIComponent).join('=')).join('&'); +const setStyle = (el, ruleName, val) => (el.style[ruleName] = val); +const shallowClone = obj => Object.assign({}, obj); +const shank = (arr, index = 0, delCount = 0, ...elements) => + arr + .slice(0, index) + .concat(elements) + .concat(arr.slice(index + delCount)); +const show = (...el) => [...el].forEach(e => (e.style.display = '')); +const shuffle = ([...arr]) => { + let m = arr.length; + while (m) { + const i = Math.floor(Math.random() * m--); + [arr[m], arr[i]] = [arr[i], arr[m]]; + } + return arr; +}; +const similarity = (arr, values) => arr.filter(v => values.includes(v)); +const size = val => + Array.isArray(val) + ? val.length + : val && typeof val === 'object' + ? val.size || val.length || Object.keys(val).length + : typeof val === 'string' + ? new Blob([val]).size + : 0; +const sleep = ms => new Promise(resolve => setTimeout(resolve, ms)); +const smoothScroll = element => + document.querySelector(element).scrollIntoView({ + behavior: 'smooth' + }); +const sortCharactersInString = str => [...str].sort((a, b) => a.localeCompare(b)).join(''); +const sortedIndex = (arr, n) => { + const isDescending = arr[0] > arr[arr.length - 1]; + const index = arr.findIndex(el => (isDescending ? n >= el : n <= el)); + return index === -1 ? arr.length : index; +}; +const sortedIndexBy = (arr, n, fn) => { + const isDescending = fn(arr[0]) > fn(arr[arr.length - 1]); + const val = fn(n); + const index = arr.findIndex(el => (isDescending ? val >= fn(el) : val <= fn(el))); + return index === -1 ? arr.length : index; +}; +const sortedLastIndex = (arr, n) => { + const isDescending = arr[0] > arr[arr.length - 1]; + const index = arr.reverse().findIndex(el => (isDescending ? n <= el : n >= el)); + return index === -1 ? 0 : arr.length - index; +}; +const sortedLastIndexBy = (arr, n, fn) => { + const isDescending = fn(arr[0]) > fn(arr[arr.length - 1]); + const val = fn(n); + const index = arr + .map(fn) + .reverse() + .findIndex(el => (isDescending ? val <= el : val >= el)); + return index === -1 ? 0 : arr.length - index; +}; +const splitLines = str => str.split(/\r?\n/); const spreadOver = fn => argsArr => fn(...argsArr); -const stableSort = (arr, compare) => - arr - .map((item, index) => ({ item, index })) - .sort((a, b) => compare(a.item, b.item) || a.index - b.index) - .map(({ item }) => item); -const standardDeviation = (arr, usePopulation = false) => { - const mean = arr.reduce((acc, val) => acc + val, 0) / arr.length; - return Math.sqrt( - arr.reduce((acc, val) => acc.concat((val - mean) ** 2), []).reduce((acc, val) => acc + val, 0) / - (arr.length - (usePopulation ? 0 : 1)) - ); -}; -const stringPermutations = str => { - if (str.length <= 2) return str.length === 2 ? [str, str[1] + str[0]] : [str]; - return str - .split('') - .reduce( - (acc, letter, i) => - acc.concat(stringPermutations(str.slice(0, i) + str.slice(i + 1)).map(val => letter + val)), - [] - ); -}; -const stripHTMLTags = str => str.replace(/<[^>]*>/g, ''); -const sum = (...arr) => [...arr].reduce((acc, val) => acc + val, 0); -const sumBy = (arr, fn) => - arr.map(typeof fn === 'function' ? fn : val => val[fn]).reduce((acc, val) => acc + val, 0); -const sumPower = (end, power = 2, start = 1) => - Array(end + 1 - start) - .fill(0) - .map((x, i) => (i + start) ** power) - .reduce((a, b) => a + b, 0); -const symmetricDifference = (a, b) => { - const sA = new Set(a), - sB = new Set(b); - return [...a.filter(x => !sB.has(x)), ...b.filter(x => !sA.has(x))]; -}; -const symmetricDifferenceBy = (a, b, fn) => { - const sA = new Set(a.map(v => fn(v))), - sB = new Set(b.map(v => fn(v))); - return [...a.filter(x => !sB.has(fn(x))), ...b.filter(x => !sA.has(fn(x)))]; -}; -const symmetricDifferenceWith = (arr, val, comp) => [ - ...arr.filter(a => val.findIndex(b => comp(a, b)) === -1), - ...val.filter(a => arr.findIndex(b => comp(a, b)) === -1) -]; -const tail = arr => (arr.length > 1 ? arr.slice(1) : arr); -const take = (arr, n = 1) => arr.slice(0, n); -const takeRight = (arr, n = 1) => arr.slice(arr.length - n, arr.length); -const takeRightWhile = (arr, func) => - arr.reduceRight((acc, el) => (func(el) ? acc : [el, ...acc]), []); -const takeWhile = (arr, func) => { - for (const [i, val] of arr.entries()) if (func(val)) return arr.slice(0, i); - return arr; -}; -const throttle = (fn, wait) => { - let inThrottle, lastFn, lastTime; - return function() { - const context = this, - args = arguments; - if (!inThrottle) { - fn.apply(context, args); - lastTime = Date.now(); - inThrottle = true; - } else { - clearTimeout(lastFn); - lastFn = setTimeout(function() { - if (Date.now() - lastTime >= wait) { - fn.apply(context, args); - lastTime = Date.now(); - } - }, Math.max(wait - (Date.now() - lastTime), 0)); - } - }; -}; -const times = (n, fn, context = undefined) => { - let i = 0; - while (fn.call(context, i) !== false && ++i < n) {} -}; -const timeTaken = callback => { - console.time('timeTaken'); - const r = callback(); - console.timeEnd('timeTaken'); - return r; -}; -const toCamelCase = str => { - let s = - str && - str - .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g) - .map(x => x.slice(0, 1).toUpperCase() + x.slice(1).toLowerCase()) - .join(''); - return s.slice(0, 1).toLowerCase() + s.slice(1); -}; -const toCurrency = (n, curr, LanguageFormat = undefined) => - Intl.NumberFormat(LanguageFormat, { style: 'currency', currency: curr }).format(n); -const toDecimalMark = num => num.toLocaleString('en-US'); -const toggleClass = (el, className) => el.classList.toggle(className); -const toHash = (object, key) => - Array.prototype.reduce.call( - object, - (acc, data, index) => ((acc[!key ? index : data[key]] = data), acc), - {} - ); -const toKebabCase = str => - str && - str - .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g) - .map(x => x.toLowerCase()) - .join('-'); -const tomorrow = () => { - let t = new Date(); - t.setDate(t.getDate() + 1); - return t.toISOString().split('T')[0]; -}; -const toOrdinalSuffix = num => { - const int = parseInt(num), - digits = [int % 10, int % 100], - ordinals = ['st', 'nd', 'rd', 'th'], - oPattern = [1, 2, 3, 4], - tPattern = [11, 12, 13, 14, 15, 16, 17, 18, 19]; - return oPattern.includes(digits[0]) && !tPattern.includes(digits[1]) - ? int + ordinals[digits[0] - 1] - : int + ordinals[3]; -}; -const toSafeInteger = num => - Math.round(Math.max(Math.min(num, Number.MAX_SAFE_INTEGER), Number.MIN_SAFE_INTEGER)); -const toSnakeCase = str => - str && - str - .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g) - .map(x => x.toLowerCase()) - .join('_'); -const toTitleCase = str => - str - .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g) - .map(x => x.charAt(0).toUpperCase() + x.slice(1)) - .join(' '); -const transform = (obj, fn, acc) => Object.keys(obj).reduce((a, k) => fn(a, obj[k], k, obj), acc); -const triggerEvent = (el, eventType, detail) => - el.dispatchEvent(new CustomEvent(eventType, { detail })); -const truncateString = (str, num) => - str.length > num ? str.slice(0, num > 3 ? num - 3 : num) + '...' : str; -const truthCheckCollection = (collection, pre) => collection.every(obj => obj[pre]); -const unary = fn => val => fn(val); -const uncurry = (fn, n = 1) => (...args) => { - const next = acc => args => args.reduce((x, y) => x(y), acc); - if (n > args.length) throw new RangeError('Arguments too few!'); - return next(fn)(args.slice(0, n)); -}; -const unescapeHTML = str => - str.replace( - /&|<|>|'|"/g, - tag => - ({ - '&': '&', - '<': '<', - '>': '>', - ''': "'", - '"': '"' - }[tag] || tag) - ); -const unflattenObject = obj => - Object.keys(obj).reduce((acc, k) => { - if (k.indexOf('.') !== -1) { - const keys = k.split('.'); - Object.assign( - acc, - JSON.parse( - '{' + - keys.map((v, i) => (i !== keys.length - 1 ? `"${v}":{` : `"${v}":`)).join('') + - obj[k] + - '}'.repeat(keys.length) - ) - ); - } else acc[k] = obj[k]; - return acc; - }, {}); -const unfold = (fn, seed) => { - let result = [], - val = [null, seed]; - while ((val = fn(val[1]))) result.push(val[0]); - return result; -}; -const union = (a, b) => Array.from(new Set([...a, ...b])); -const unionBy = (a, b, fn) => { - const s = new Set(a.map(fn)); - return Array.from(new Set([...a, ...b.filter(x => !s.has(fn(x)))])); -}; -const unionWith = (a, b, comp) => - Array.from(new Set([...a, ...b.filter(x => a.findIndex(y => comp(x, y)) === -1)])); -const uniqueElements = arr => [...new Set(arr)]; -const uniqueElementsBy = (arr, fn) => - arr.reduce((acc, v) => { - if (!acc.some(x => fn(v, x))) acc.push(v); - return acc; - }, []); -const uniqueElementsByRight = (arr, fn) => - arr.reduceRight((acc, v) => { - if (!acc.some(x => fn(v, x))) acc.push(v); - return acc; - }, []); -const uniqueSymmetricDifference = (a, b) => [ - ...new Set([...a.filter(v => !b.includes(v)), ...b.filter(v => !a.includes(v))]) -]; -const untildify = str => str.replace(/^~($|\/|\\)/, `${require('os').homedir()}$1`); -const unzip = arr => - arr.reduce( - (acc, val) => (val.forEach((v, i) => acc[i].push(v)), acc), - Array.from({ - length: Math.max(...arr.map(x => x.length)) - }).map(x => []) - ); -const unzipWith = (arr, fn) => - arr - .reduce( - (acc, val) => (val.forEach((v, i) => acc[i].push(v)), acc), - Array.from({ - length: Math.max(...arr.map(x => x.length)) - }).map(x => []) - ) - .map(val => fn(...val)); -const URLJoin = (...args) => - args - .join('/') - .replace(/[\/]+/g, '/') - .replace(/^(.+):\//, '$1://') - .replace(/^file:/, 'file:/') - .replace(/\/(\?|&|#[^!])/g, '$1') - .replace(/\?/g, '&') - .replace('&', '?'); -const UUIDGeneratorBrowser = () => - ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c => - (c ^ (crypto.getRandomValues(new Uint8Array(1))[0] & (15 >> (c / 4)))).toString(16) - ); - -const UUIDGeneratorNode = () => - ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c => - (c ^ (crypto.randomBytes(1)[0] & (15 >> (c / 4)))).toString(16) - ); -const validateNumber = n => !isNaN(parseFloat(n)) && isFinite(n) && Number(n) == n; -const vectorDistance = (...coords) => { - let pointLength = Math.trunc(coords.length / 2); - let sum = coords - .slice(0, pointLength) - .reduce((acc, val, i) => acc + Math.pow(val - coords[pointLength + i], 2), 0); - return Math.sqrt(sum); -}; -const when = (pred, whenTrue) => x => (pred(x) ? whenTrue(x) : x); -const without = (arr, ...args) => arr.filter(v => !args.includes(v)); -const words = (str, pattern = /[^a-zA-Z-]+/) => str.split(pattern).filter(Boolean); -const xProd = (a, b) => a.reduce((acc, x) => acc.concat(b.map(y => [x, y])), []); -const yesNo = (val, def = false) => - /^(y|yes)$/i.test(val) ? true : /^(n|no)$/i.test(val) ? false : def; -const zip = (...arrays) => { - const maxLength = Math.max(...arrays.map(x => x.length)); - return Array.from({ length: maxLength }).map((_, i) => { - return Array.from({ length: arrays.length }, (_, k) => arrays[k][i]); - }); -}; -const zipObject = (props, values) => - props.reduce((obj, prop, index) => ((obj[prop] = values[index]), obj), {}); -const zipWith = (...array) => { - const fn = typeof array[array.length - 1] === 'function' ? array.pop() : undefined; - return Array.from( - { length: Math.max(...array.map(a => a.length)) }, - (_, i) => (fn ? fn(...array.map(a => a[i])) : array.map(a => a[i])) - ); -}; - const binarySearch = (arr, val, start = 0, end = arr.length - 1) => { - if (start > end) return -1; - const mid = Math.floor((start + end) / 2); - if (arr[mid] > val) return binarySearch(arr, val, start, mid - 1); - if (arr[mid] < val) return binarySearch(arr, val, mid + 1, end); - return mid; -}; - const celsiusToFahrenheit = degrees => 1.8 * degrees + 32; - const cleanObj = (obj, keysToKeep = [], childIndicator) => { - Object.keys(obj).forEach(key => { - if (key === childIndicator) { - cleanObj(obj[key], keysToKeep, childIndicator); - } else if (!keysToKeep.includes(key)) { - delete obj[key]; - } - }); - return obj; -}; - const collatz = n => (n % 2 === 0 ? n / 2 : 3 * n + 1); - const countVowels = str => (str.match(/[aeiou]/gi) || []).length; - const factors = (num, primes = false) => { - const isPrime = num => { - const boundary = Math.floor(Math.sqrt(num)); - for (var i = 2; i <= boundary; i++) if (num % i === 0) return false; - return num >= 2; - }; - const isNeg = num < 0; - num = isNeg ? -num : num; - let array = Array.from({ length: num - 1 }) - .map((val, i) => (num % (i + 2) === 0 ? i + 2 : false)) - .filter(val => val); - if (isNeg) - array = array.reduce((acc, val) => { - acc.push(val); - acc.push(-val); - return acc; - }, []); - return primes ? array.filter(isPrime) : array; -}; - const fahrenheitToCelsius = degrees => (degrees - 32) * 5/9; - const fibonacciCountUntilNum = num => - Math.ceil(Math.log(num * Math.sqrt(5) + 1 / 2) / Math.log((Math.sqrt(5) + 1) / 2)); - const fibonacciUntilNum = num => { - let n = Math.ceil(Math.log(num * Math.sqrt(5) + 1 / 2) / Math.log((Math.sqrt(5) + 1) / 2)); - return Array.from({ length: n }).reduce( - (acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i), - [] - ); -}; - const heronArea = (side_a, side_b, side_c) => { - const p = (side_a + side_b + side_c) / 2 - return Math.sqrt(p * (p-side_a) * (p-side_b) * (p-side_c)) - }; - const howManyTimes = (num, divisor) => { - if (divisor === 1 || divisor === -1) return Infinity; - if (divisor === 0) return 0; - let i = 0; - while (Number.isInteger(num / divisor)) { - i++; - num = num / divisor; - } - return i; -}; - const httpDelete = (url, callback, err = console.error) => { - const request = new XMLHttpRequest(); - request.open('DELETE', url, true); - request.onload = () => callback(request); - request.onerror = () => err(request); - request.send(); -}; - const httpPut = (url, data, callback, err = console.error) => { - const request = new XMLHttpRequest(); - request.open("PUT", url, true); - request.setRequestHeader('Content-type','application/json; charset=utf-8'); - request.onload = () => callback(request); - request.onerror = () => err(request); - request.send(data); -}; - const isArmstrongNumber = digits => - (arr => arr.reduce((a, d) => a + parseInt(d) ** arr.length, 0) == digits)( - (digits + '').split('') - ); - const isSimilar = (pattern, str) => - [...str].reduce( - (matchIndex, char) => - char.toLowerCase() === (pattern[matchIndex] || '').toLowerCase() - ? matchIndex + 1 - : matchIndex, - 0 - ) === pattern.length; - const JSONToDate = arr => { - const dt = new Date(parseInt(arr.toString().substr(6))); - return `${dt.getDate()}/${dt.getMonth() + 1}/${dt.getFullYear()}`; -}; - const kmphToMph = (kmph) => 0.621371192 * kmph; - const levenshteinDistance = (string1, string2) => { - if (string1.length === 0) return string2.length; - if (string2.length === 0) return string1.length; - let matrix = Array(string2.length + 1) - .fill(0) - .map((x, i) => [i]); - matrix[0] = Array(string1.length + 1) - .fill(0) - .map((x, i) => i); - for (let i = 1; i <= string2.length; i++) { - for (let j = 1; j <= string1.length; j++) { - if (string2[i - 1] === string1[j - 1]) { - matrix[i][j] = matrix[i - 1][j - 1]; - } else { - matrix[i][j] = Math.min( - matrix[i - 1][j - 1] + 1, - matrix[i][j - 1] + 1, - matrix[i - 1][j] + 1 - ); - } - } - } - return matrix[string2.length][string1.length]; -}; - const mphToKmph = (mph) => 1.6093440006146922 * mph; - const pipeLog = data => console.log(data) || data; - const quickSort = ([n, ...nums], desc) => - isNaN(n) - ? [] - : [ - ...quickSort(nums.filter(v => (desc ? v > n : v <= n)), desc), - n, - ...quickSort(nums.filter(v => (!desc ? v > n : v <= n)), desc) - ]; - const removeVowels = (str, repl = '') => str.replace(/[aeiou]/gi, repl); - const solveRPN = rpn => { - const OPERATORS = { - '*': (a, b) => a * b, - '+': (a, b) => a + b, - '-': (a, b) => a - b, - '/': (a, b) => a / b, - '**': (a, b) => a ** b - }; - const [stack, solve] = [ - [], - rpn - .replace(/\^/g, '**') - .split(/\s+/g) - .filter(el => !/\s+/.test(el) && el !== '') - ]; - solve.forEach(symbol => { - if (!isNaN(parseFloat(symbol)) && isFinite(symbol)) { - stack.push(symbol); - } else if (Object.keys(OPERATORS).includes(symbol)) { - const [a, b] = [stack.pop(), stack.pop()]; - stack.push(OPERATORS[symbol](parseFloat(b), parseFloat(a))); - } else { - throw `${symbol} is not a recognized symbol`; - } - }); - if (stack.length === 1) return stack.pop(); - else throw `${rpn} is not a proper RPN. Please check it and try again`; -}; - const speechSynthesis = message => { - const msg = new SpeechSynthesisUtterance(message); - msg.voice = window.speechSynthesis.getVoices()[0]; - window.speechSynthesis.speak(msg); -}; - const squareSum = (...args) => args.reduce((squareSum, number) => squareSum + Math.pow(number, 2), 0); +const stableSort = (arr, compare) => + arr + .map((item, index) => ({ item, index })) + .sort((a, b) => compare(a.item, b.item) || a.index - b.index) + .map(({ item }) => item); +const standardDeviation = (arr, usePopulation = false) => { + const mean = arr.reduce((acc, val) => acc + val, 0) / arr.length; + return Math.sqrt( + arr.reduce((acc, val) => acc.concat((val - mean) ** 2), []).reduce((acc, val) => acc + val, 0) / + (arr.length - (usePopulation ? 0 : 1)) + ); +}; +const stringPermutations = str => { + if (str.length <= 2) return str.length === 2 ? [str, str[1] + str[0]] : [str]; + return str + .split('') + .reduce( + (acc, letter, i) => + acc.concat(stringPermutations(str.slice(0, i) + str.slice(i + 1)).map(val => letter + val)), + [] + ); +}; +const stripHTMLTags = str => str.replace(/<[^>]*>/g, ''); +const sum = (...arr) => [...arr].reduce((acc, val) => acc + val, 0); +const sumBy = (arr, fn) => + arr.map(typeof fn === 'function' ? fn : val => val[fn]).reduce((acc, val) => acc + val, 0); +const sumPower = (end, power = 2, start = 1) => + Array(end + 1 - start) + .fill(0) + .map((x, i) => (i + start) ** power) + .reduce((a, b) => a + b, 0); +const symmetricDifference = (a, b) => { + const sA = new Set(a), + sB = new Set(b); + return [...a.filter(x => !sB.has(x)), ...b.filter(x => !sA.has(x))]; +}; +const symmetricDifferenceBy = (a, b, fn) => { + const sA = new Set(a.map(v => fn(v))), + sB = new Set(b.map(v => fn(v))); + return [...a.filter(x => !sB.has(fn(x))), ...b.filter(x => !sA.has(fn(x)))]; +}; +const symmetricDifferenceWith = (arr, val, comp) => [ + ...arr.filter(a => val.findIndex(b => comp(a, b)) === -1), + ...val.filter(a => arr.findIndex(b => comp(a, b)) === -1) +]; +const tail = arr => (arr.length > 1 ? arr.slice(1) : arr); +const take = (arr, n = 1) => arr.slice(0, n); +const takeRight = (arr, n = 1) => arr.slice(arr.length - n, arr.length); +const takeRightWhile = (arr, func) => + arr.reduceRight((acc, el) => (func(el) ? acc : [el, ...acc]), []); +const takeWhile = (arr, func) => { + for (const [i, val] of arr.entries()) if (func(val)) return arr.slice(0, i); + return arr; +}; +const throttle = (fn, wait) => { + let inThrottle, lastFn, lastTime; + return function() { + const context = this, + args = arguments; + if (!inThrottle) { + fn.apply(context, args); + lastTime = Date.now(); + inThrottle = true; + } else { + clearTimeout(lastFn); + lastFn = setTimeout(function() { + if (Date.now() - lastTime >= wait) { + fn.apply(context, args); + lastTime = Date.now(); + } + }, Math.max(wait - (Date.now() - lastTime), 0)); + } + }; +}; +const timeTaken = callback => { + console.time('timeTaken'); + const r = callback(); + console.timeEnd('timeTaken'); + return r; +}; +const times = (n, fn, context = undefined) => { + let i = 0; + while (fn.call(context, i) !== false && ++i < n) {} +}; +const toCamelCase = str => { + let s = + str && + str + .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g) + .map(x => x.slice(0, 1).toUpperCase() + x.slice(1).toLowerCase()) + .join(''); + return s.slice(0, 1).toLowerCase() + s.slice(1); +}; +const toCurrency = (n, curr, LanguageFormat = undefined) => + Intl.NumberFormat(LanguageFormat, { style: 'currency', currency: curr }).format(n); +const toDecimalMark = num => num.toLocaleString('en-US'); +const toHash = (object, key) => + Array.prototype.reduce.call( + object, + (acc, data, index) => ((acc[!key ? index : data[key]] = data), acc), + {} + ); +const toKebabCase = str => + str && + str + .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g) + .map(x => x.toLowerCase()) + .join('-'); +const toOrdinalSuffix = num => { + const int = parseInt(num), + digits = [int % 10, int % 100], + ordinals = ['st', 'nd', 'rd', 'th'], + oPattern = [1, 2, 3, 4], + tPattern = [11, 12, 13, 14, 15, 16, 17, 18, 19]; + return oPattern.includes(digits[0]) && !tPattern.includes(digits[1]) + ? int + ordinals[digits[0] - 1] + : int + ordinals[3]; +}; +const toSafeInteger = num => + Math.round(Math.max(Math.min(num, Number.MAX_SAFE_INTEGER), Number.MIN_SAFE_INTEGER)); +const toSnakeCase = str => + str && + str + .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g) + .map(x => x.toLowerCase()) + .join('_'); +const toTitleCase = str => + str + .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g) + .map(x => x.charAt(0).toUpperCase() + x.slice(1)) + .join(' '); +const toggleClass = (el, className) => el.classList.toggle(className); +const tomorrow = () => { + let t = new Date(); + t.setDate(t.getDate() + 1); + return t.toISOString().split('T')[0]; +}; +const transform = (obj, fn, acc) => Object.keys(obj).reduce((a, k) => fn(a, obj[k], k, obj), acc); +const triggerEvent = (el, eventType, detail) => + el.dispatchEvent(new CustomEvent(eventType, { detail })); +const truncateString = (str, num) => + str.length > num ? str.slice(0, num > 3 ? num - 3 : num) + '...' : str; +const truthCheckCollection = (collection, pre) => collection.every(obj => obj[pre]); +const unary = fn => val => fn(val); +const uncurry = (fn, n = 1) => (...args) => { + const next = acc => args => args.reduce((x, y) => x(y), acc); + if (n > args.length) throw new RangeError('Arguments too few!'); + return next(fn)(args.slice(0, n)); +}; +const unescapeHTML = str => + str.replace( + /&|<|>|'|"/g, + tag => + ({ + '&': '&', + '<': '<', + '>': '>', + ''': "'", + '"': '"' + }[tag] || tag) + ); +const unflattenObject = obj => + Object.keys(obj).reduce((acc, k) => { + if (k.indexOf('.') !== -1) { + const keys = k.split('.'); + Object.assign( + acc, + JSON.parse( + '{' + + keys.map((v, i) => (i !== keys.length - 1 ? `"${v}":{` : `"${v}":`)).join('') + + obj[k] + + '}'.repeat(keys.length) + ) + ); + } else acc[k] = obj[k]; + return acc; + }, {}); +const unfold = (fn, seed) => { + let result = [], + val = [null, seed]; + while ((val = fn(val[1]))) result.push(val[0]); + return result; +}; +const union = (a, b) => Array.from(new Set([...a, ...b])); +const unionBy = (a, b, fn) => { + const s = new Set(a.map(fn)); + return Array.from(new Set([...a, ...b.filter(x => !s.has(fn(x)))])); +}; +const unionWith = (a, b, comp) => + Array.from(new Set([...a, ...b.filter(x => a.findIndex(y => comp(x, y)) === -1)])); +const uniqueElements = arr => [...new Set(arr)]; +const uniqueElementsBy = (arr, fn) => + arr.reduce((acc, v) => { + if (!acc.some(x => fn(v, x))) acc.push(v); + return acc; + }, []); +const uniqueElementsByRight = (arr, fn) => + arr.reduceRight((acc, v) => { + if (!acc.some(x => fn(v, x))) acc.push(v); + return acc; + }, []); +const uniqueSymmetricDifference = (a, b) => [ + ...new Set([...a.filter(v => !b.includes(v)), ...b.filter(v => !a.includes(v))]) +]; +const untildify = str => str.replace(/^~($|\/|\\)/, `${require('os').homedir()}$1`); +const unzip = arr => + arr.reduce( + (acc, val) => (val.forEach((v, i) => acc[i].push(v)), acc), + Array.from({ + length: Math.max(...arr.map(x => x.length)) + }).map(x => []) + ); +const unzipWith = (arr, fn) => + arr + .reduce( + (acc, val) => (val.forEach((v, i) => acc[i].push(v)), acc), + Array.from({ + length: Math.max(...arr.map(x => x.length)) + }).map(x => []) + ) + .map(val => fn(...val)); +const validateNumber = n => !isNaN(parseFloat(n)) && isFinite(n) && Number(n) == n; +const vectorDistance = (...coords) => { + let pointLength = Math.trunc(coords.length / 2); + let sum = coords + .slice(0, pointLength) + .reduce((acc, val, i) => acc + Math.pow(val - coords[pointLength + i], 2), 0); + return Math.sqrt(sum); +}; +const when = (pred, whenTrue) => x => (pred(x) ? whenTrue(x) : x); +const without = (arr, ...args) => arr.filter(v => !args.includes(v)); +const words = (str, pattern = /[^a-zA-Z-]+/) => str.split(pattern).filter(Boolean); +const xProd = (a, b) => a.reduce((acc, x) => acc.concat(b.map(y => [x, y])), []); +const yesNo = (val, def = false) => + /^(y|yes)$/i.test(val) ? true : /^(n|no)$/i.test(val) ? false : def; +const zip = (...arrays) => { + const maxLength = Math.max(...arrays.map(x => x.length)); + return Array.from({ length: maxLength }).map((_, i) => { + return Array.from({ length: arrays.length }, (_, k) => arrays[k][i]); + }); +}; +const zipObject = (props, values) => + props.reduce((obj, prop, index) => ((obj[prop] = values[index]), obj), {}); +const zipWith = (...array) => { + const fn = typeof array[array.length - 1] === 'function' ? array.pop() : undefined; + return Array.from( + { length: Math.max(...array.map(a => a.length)) }, + (_, i) => (fn ? fn(...array.map(a => a[i])) : array.map(a => a[i])) + ); +}; +const JSONToDate = arr => { + const dt = new Date(parseInt(arr.toString().substr(6))); + return `${dt.getDate()}/${dt.getMonth() + 1}/${dt.getFullYear()}`; +}; +const binarySearch = (arr, val, start = 0, end = arr.length - 1) => { + if (start > end) return -1; + const mid = Math.floor((start + end) / 2); + if (arr[mid] > val) return binarySearch(arr, val, start, mid - 1); + if (arr[mid] < val) return binarySearch(arr, val, mid + 1, end); + return mid; +}; +const celsiusToFahrenheit = degrees => 1.8 * degrees + 32; +const cleanObj = (obj, keysToKeep = [], childIndicator) => { + Object.keys(obj).forEach(key => { + if (key === childIndicator) { + cleanObj(obj[key], keysToKeep, childIndicator); + } else if (!keysToKeep.includes(key)) { + delete obj[key]; + } + }); + return obj; +}; +const collatz = n => (n % 2 === 0 ? n / 2 : 3 * n + 1); +const countVowels = str => (str.match(/[aeiou]/gi) || []).length; +const factors = (num, primes = false) => { + const isPrime = num => { + const boundary = Math.floor(Math.sqrt(num)); + for (var i = 2; i <= boundary; i++) if (num % i === 0) return false; + return num >= 2; + }; + const isNeg = num < 0; + num = isNeg ? -num : num; + let array = Array.from({ length: num - 1 }) + .map((val, i) => (num % (i + 2) === 0 ? i + 2 : false)) + .filter(val => val); + if (isNeg) + array = array.reduce((acc, val) => { + acc.push(val); + acc.push(-val); + return acc; + }, []); + return primes ? array.filter(isPrime) : array; +}; +const fahrenheitToCelsius = degrees => (degrees - 32) * 5/9; +const fibonacciCountUntilNum = num => + Math.ceil(Math.log(num * Math.sqrt(5) + 1 / 2) / Math.log((Math.sqrt(5) + 1) / 2)); +const fibonacciUntilNum = num => { + let n = Math.ceil(Math.log(num * Math.sqrt(5) + 1 / 2) / Math.log((Math.sqrt(5) + 1) / 2)); + return Array.from({ length: n }).reduce( + (acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i), + [] + ); +}; +const heronArea = (side_a, side_b, side_c) => { + const p = (side_a + side_b + side_c) / 2 + return Math.sqrt(p * (p-side_a) * (p-side_b) * (p-side_c)) + }; +const howManyTimes = (num, divisor) => { + if (divisor === 1 || divisor === -1) return Infinity; + if (divisor === 0) return 0; + let i = 0; + while (Number.isInteger(num / divisor)) { + i++; + num = num / divisor; + } + return i; +}; +const httpDelete = (url, callback, err = console.error) => { + const request = new XMLHttpRequest(); + request.open('DELETE', url, true); + request.onload = () => callback(request); + request.onerror = () => err(request); + request.send(); +}; +const httpPut = (url, data, callback, err = console.error) => { + const request = new XMLHttpRequest(); + request.open("PUT", url, true); + request.setRequestHeader('Content-type','application/json; charset=utf-8'); + request.onload = () => callback(request); + request.onerror = () => err(request); + request.send(data); +}; +const isArmstrongNumber = digits => + (arr => arr.reduce((a, d) => a + parseInt(d) ** arr.length, 0) == digits)( + (digits + '').split('') + ); +const isSimilar = (pattern, str) => + [...str].reduce( + (matchIndex, char) => + char.toLowerCase() === (pattern[matchIndex] || '').toLowerCase() + ? matchIndex + 1 + : matchIndex, + 0 + ) === pattern.length; +const kmphToMph = (kmph) => 0.621371192 * kmph; +const levenshteinDistance = (string1, string2) => { + if (string1.length === 0) return string2.length; + if (string2.length === 0) return string1.length; + let matrix = Array(string2.length + 1) + .fill(0) + .map((x, i) => [i]); + matrix[0] = Array(string1.length + 1) + .fill(0) + .map((x, i) => i); + for (let i = 1; i <= string2.length; i++) { + for (let j = 1; j <= string1.length; j++) { + if (string2[i - 1] === string1[j - 1]) { + matrix[i][j] = matrix[i - 1][j - 1]; + } else { + matrix[i][j] = Math.min( + matrix[i - 1][j - 1] + 1, + matrix[i][j - 1] + 1, + matrix[i - 1][j] + 1 + ); + } + } + } + return matrix[string2.length][string1.length]; +}; +const mphToKmph = (mph) => 1.6093440006146922 * mph; +const pipeLog = data => console.log(data) || data; +const quickSort = ([n, ...nums], desc) => + isNaN(n) + ? [] + : [ + ...quickSort(nums.filter(v => (desc ? v > n : v <= n)), desc), + n, + ...quickSort(nums.filter(v => (!desc ? v > n : v <= n)), desc) + ]; +const removeVowels = (str, repl = '') => str.replace(/[aeiou]/gi, repl); +const solveRPN = rpn => { + const OPERATORS = { + '*': (a, b) => a * b, + '+': (a, b) => a + b, + '-': (a, b) => a - b, + '/': (a, b) => a / b, + '**': (a, b) => a ** b + }; + const [stack, solve] = [ + [], + rpn + .replace(/\^/g, '**') + .split(/\s+/g) + .filter(el => !/\s+/.test(el) && el !== '') + ]; + solve.forEach(symbol => { + if (!isNaN(parseFloat(symbol)) && isFinite(symbol)) { + stack.push(symbol); + } else if (Object.keys(OPERATORS).includes(symbol)) { + const [a, b] = [stack.pop(), stack.pop()]; + stack.push(OPERATORS[symbol](parseFloat(b), parseFloat(a))); + } else { + throw `${symbol} is not a recognized symbol`; + } + }); + if (stack.length === 1) return stack.pop(); + else throw `${rpn} is not a proper RPN. Please check it and try again`; +}; +const speechSynthesis = message => { + const msg = new SpeechSynthesisUtterance(message); + msg.voice = window.speechSynthesis.getVoices()[0]; + window.speechSynthesis.speak(msg); +}; +const squareSum = (...args) => args.reduce((squareSum, number) => squareSum + Math.pow(number, 2), 0); -module.exports = {all,allEqual,any,approximatelyEqual,arrayToCSV,arrayToHtmlList,ary,atob,attempt,average,averageBy,bifurcate,bifurcateBy,bind,bindAll,bindKey,binomialCoefficient,bottomVisible,btoa,byteSize,call,capitalize,capitalizeEveryWord,castArray,chainAsync,checkProp,chunk,clampNumber,cloneRegExp,coalesce,coalesceFactory,collectInto,colorize,compact,compactWhitespace,compose,composeRight,converge,copyToClipboard,countBy,counter,countOccurrences,createDirIfNotExists,createElement,createEventHub,CSVToArray,CSVToJSON,currentURL,curry,dayOfYear,debounce,decapitalize,deepClone,deepFlatten,deepFreeze,deepGet,deepMapKeys,defaults,defer,degreesToRads,delay,detectDeviceType,difference,differenceBy,differenceWith,dig,digitize,distance,drop,dropRight,dropRightWhile,dropWhile,elementContains,elementIsVisibleInViewport,elo,equals,escapeHTML,escapeRegExp,everyNth,extendHex,factorial,fibonacci,filterFalsy,filterNonUnique,filterNonUniqueBy,findKey,findLast,findLastIndex,findLastKey,flatten,flattenObject,flip,forEachRight,formatDuration,formToObject,forOwn,forOwnRight,fromCamelCase,functionName,functions,gcd,geometricProgression,get,getColonTimeFromDate,getDaysDiffBetweenDates,getImages,getMeridiemSuffixOfInteger,getScrollPosition,getStyle,getType,getURLParameters,groupBy,hammingDistance,hasClass,hasFlags,hashBrowser,hashNode,head,hexToRGB,hide,httpGet,httpPost,httpsRedirect,hz,indentString,indexOfAll,initial,initialize2DArray,initializeArrayWithRange,initializeArrayWithRangeRight,initializeArrayWithValues,initializeNDArray,inRange,insertAfter,insertBefore,intersection,intersectionBy,intersectionWith,invertKeyValues,is,isAbsoluteURL,isAfterDate,isAnagram,isArrayLike,isBeforeDate,isBoolean,isBrowser,isBrowserTabFocused,isDivisible,isDuplexStream,isEmpty,isEven,isFunction,isLowerCase,isNegativeZero,isNil,isNull,isNumber,isObject,isObjectLike,isPlainObject,isPrime,isPrimitive,isPromiseLike,isReadableStream,isSameDate,isSorted,isStream,isString,isSymbol,isTravisCI,isUndefined,isUpperCase,isValidJSON,isWritableStream,join,JSONtoCSV,JSONToFile,last,lcm,longestItem,lowercaseKeys,luhnCheck,mapKeys,mapNumRange,mapObject,mapString,mapValues,mask,matches,matchesWith,maxBy,maxDate,maxN,median,memoize,merge,midpoint,minBy,minDate,minN,mostPerformant,negate,nest,nodeListToArray,none,nthArg,nthElement,objectFromPairs,objectToPairs,observeMutations,off,offset,omit,omitBy,on,once,onUserInputChange,orderBy,over,overArgs,pad,palindrome,parseCookie,partial,partialRight,partition,percentile,permutations,pick,pickBy,pipeAsyncFunctions,pipeFunctions,pluralize,powerset,prefix,prettyBytes,primes,promisify,pull,pullAtIndex,pullAtValue,pullBy,radsToDegrees,randomHexColorCode,randomIntArrayInRange,randomIntegerInRange,randomNumberInRange,readFileLines,rearg,recordAnimationFrames,redirect,reducedFilter,reduceSuccessive,reduceWhich,reject,remove,removeNonASCII,renameKeys,reverseString,RGBToHex,round,runAsync,runPromisesInSeries,sample,sampleSize,scrollToTop,sdbm,serializeCookie,serializeForm,setStyle,shallowClone,shank,show,shuffle,similarity,size,sleep,smoothScroll,sortCharactersInString,sortedIndex,sortedIndexBy,sortedLastIndex,sortedLastIndexBy,splitLines,spreadOver,stableSort,standardDeviation,stringPermutations,stripHTMLTags,sum,sumBy,sumPower,symmetricDifference,symmetricDifferenceBy,symmetricDifferenceWith,tail,take,takeRight,takeRightWhile,takeWhile,throttle,times,timeTaken,toCamelCase,toCurrency,toDecimalMark,toggleClass,toHash,toKebabCase,tomorrow,toOrdinalSuffix,toSafeInteger,toSnakeCase,toTitleCase,transform,triggerEvent,truncateString,truthCheckCollection,unary,uncurry,unescapeHTML,unflattenObject,unfold,union,unionBy,unionWith,uniqueElements,uniqueElementsBy,uniqueElementsByRight,uniqueSymmetricDifference,untildify,unzip,unzipWith,URLJoin,UUIDGeneratorBrowser,UUIDGeneratorNode,validateNumber,vectorDistance,when,without,words,xProd,yesNo,zip,zipObject,zipWith,binarySearch,celsiusToFahrenheit,cleanObj,collatz,countVowels,factors,fahrenheitToCelsius,fibonacciCountUntilNum,fibonacciUntilNum,heronArea,howManyTimes,httpDelete,httpPut,isArmstrongNumber,isSimilar,JSONToDate,kmphToMph,levenshteinDistance,mphToKmph,pipeLog,quickSort,removeVowels,solveRPN,speechSynthesis,squareSum} \ No newline at end of file +module.exports = {CSVToArray,CSVToJSON,JSONToFile,JSONtoCSV,RGBToHex,URLJoin,UUIDGeneratorBrowser,UUIDGeneratorNode,all,allEqual,any,approximatelyEqual,arrayToCSV,arrayToHtmlList,ary,atob,attempt,average,averageBy,bifurcate,bifurcateBy,bind,bindAll,bindKey,binomialCoefficient,bottomVisible,btoa,byteSize,call,capitalize,capitalizeEveryWord,castArray,chainAsync,checkProp,chunk,clampNumber,cloneRegExp,coalesce,coalesceFactory,collectInto,colorize,compact,compactWhitespace,compose,composeRight,converge,copyToClipboard,countBy,countOccurrences,counter,createDirIfNotExists,createElement,createEventHub,currentURL,curry,dayOfYear,debounce,decapitalize,deepClone,deepFlatten,deepFreeze,deepGet,deepMapKeys,defaults,defer,degreesToRads,delay,detectDeviceType,difference,differenceBy,differenceWith,dig,digitize,distance,drop,dropRight,dropRightWhile,dropWhile,elementContains,elementIsVisibleInViewport,elo,equals,escapeHTML,escapeRegExp,everyNth,extendHex,factorial,fibonacci,filterFalsy,filterNonUnique,filterNonUniqueBy,findKey,findLast,findLastIndex,findLastKey,flatten,flattenObject,flip,forEachRight,forOwn,forOwnRight,formToObject,formatDuration,fromCamelCase,functionName,functions,gcd,geometricProgression,get,getColonTimeFromDate,getDaysDiffBetweenDates,getImages,getMeridiemSuffixOfInteger,getScrollPosition,getStyle,getType,getURLParameters,groupBy,hammingDistance,hasClass,hasFlags,hashBrowser,hashNode,head,hexToRGB,hide,httpGet,httpPost,httpsRedirect,hz,inRange,indentString,indexOfAll,initial,initialize2DArray,initializeArrayWithRange,initializeArrayWithRangeRight,initializeArrayWithValues,initializeNDArray,insertAfter,insertBefore,intersection,intersectionBy,intersectionWith,invertKeyValues,is,isAbsoluteURL,isAfterDate,isAnagram,isArrayLike,isBeforeDate,isBoolean,isBrowser,isBrowserTabFocused,isDivisible,isDuplexStream,isEmpty,isEven,isFunction,isLowerCase,isNegativeZero,isNil,isNull,isNumber,isObject,isObjectLike,isPlainObject,isPrime,isPrimitive,isPromiseLike,isReadableStream,isSameDate,isSorted,isStream,isString,isSymbol,isTravisCI,isUndefined,isUpperCase,isValidJSON,isWritableStream,join,last,lcm,longestItem,lowercaseKeys,luhnCheck,mapKeys,mapNumRange,mapObject,mapString,mapValues,mask,matches,matchesWith,maxBy,maxDate,maxN,median,memoize,merge,midpoint,minBy,minDate,minN,mostPerformant,negate,nest,nodeListToArray,none,nthArg,nthElement,objectFromPairs,objectToPairs,observeMutations,off,offset,omit,omitBy,on,onUserInputChange,once,orderBy,over,overArgs,pad,palindrome,parseCookie,partial,partialRight,partition,percentile,permutations,pick,pickBy,pipeAsyncFunctions,pipeFunctions,pluralize,powerset,prefix,prettyBytes,primes,promisify,pull,pullAtIndex,pullAtValue,pullBy,radsToDegrees,randomHexColorCode,randomIntArrayInRange,randomIntegerInRange,randomNumberInRange,readFileLines,rearg,recordAnimationFrames,redirect,reduceSuccessive,reduceWhich,reducedFilter,reject,remove,removeNonASCII,renameKeys,reverseString,round,runAsync,runPromisesInSeries,sample,sampleSize,scrollToTop,sdbm,serializeCookie,serializeForm,setStyle,shallowClone,shank,show,shuffle,similarity,size,sleep,smoothScroll,sortCharactersInString,sortedIndex,sortedIndexBy,sortedLastIndex,sortedLastIndexBy,splitLines,spreadOver,stableSort,standardDeviation,stringPermutations,stripHTMLTags,sum,sumBy,sumPower,symmetricDifference,symmetricDifferenceBy,symmetricDifferenceWith,tail,take,takeRight,takeRightWhile,takeWhile,throttle,timeTaken,times,toCamelCase,toCurrency,toDecimalMark,toHash,toKebabCase,toOrdinalSuffix,toSafeInteger,toSnakeCase,toTitleCase,toggleClass,tomorrow,transform,triggerEvent,truncateString,truthCheckCollection,unary,uncurry,unescapeHTML,unflattenObject,unfold,union,unionBy,unionWith,uniqueElements,uniqueElementsBy,uniqueElementsByRight,uniqueSymmetricDifference,untildify,unzip,unzipWith,validateNumber,vectorDistance,when,without,words,xProd,yesNo,zip,zipObject,zipWith,JSONToDate,binarySearch,celsiusToFahrenheit,cleanObj,collatz,countVowels,factors,fahrenheitToCelsius,fibonacciCountUntilNum,fibonacciUntilNum,heronArea,howManyTimes,httpDelete,httpPut,isArmstrongNumber,isSimilar,kmphToMph,levenshteinDistance,mphToKmph,pipeLog,quickSort,removeVowels,solveRPN,speechSynthesis,squareSum} \ No newline at end of file