Travis build: 1021 [cron]
This commit is contained in:
30secondsofcode
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"id": "vectorDistance",
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"type": "snippetListing",
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"attributes": {
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"tags": [
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"math",
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"beginner"
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"id": "when",
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"type": "snippetListing",
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@ -1184,7 +1184,7 @@
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"fileName": "deepMapKeys.md",
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"text": "Deep maps an object keys.\n\nCreates an object with the same values as the provided object and keys generated by running the provided function for each key.\n\nUse `Object.keys(obj)` to iterate over the object's keys. \nUse `Array.prototype.reduce()` to create a new object with the same values and mapped keys using `fn`.",
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"codeBlocks": {
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"es6": "const deepMapKeys = (obj, f) =>\n Array.isArray(obj)\n ? obj.map(val => deepMapKeys(val, f))\n : typeof obj === 'object'\n ? Object.keys(obj).reduce((acc, current) => {\n const val = obj[current];\n acc[f(current)] =\n val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val);\n return acc;\n }, {})\n : obj;",
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"es6": "const deepMapKeys = (obj, f) =>\n Array.isArray(obj)\n ? obj.map(val => deepMapKeys(val, f))\n : typeof obj === 'object'\n ? Object.keys(obj).reduce((acc, current) => {\n const val = obj[current];\n acc[f(current)] =\n val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val);\n return acc;\n }, {})\n : obj;",
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"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar deepMapKeys = function deepMapKeys(obj, f) {\n return Array.isArray(obj) ? obj.map(function (val) {\n return deepMapKeys(val, f);\n }) : _typeof(obj) === 'object' ? Object.keys(obj).reduce(function (acc, current) {\n var val = obj[current];\n acc[f(current)] = val !== null && _typeof(val) === 'object' ? deepMapKeys(val, f) : acc[f(current)] = val;\n return acc;\n }, {}) : obj;\n};",
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"example": "const obj = {\n foo: '1',\n nested: {\n child: {\n withArray: [\n {\n grandChild: ['hello']\n }\n ]\n }\n }\n};\nconst upperKeysObj = deepMapKeys(obj, key => key.toUpperCase());\n/*\n{\n \"FOO\":\"1\",\n \"NESTED\":{\n \"CHILD\":{\n \"WITHARRAY\":[\n {\n \"GRANDCHILD\":[ 'hello' ]\n }\n ]\n }\n }\n}\n*/"
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@ -1377,7 +1377,7 @@
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"fileName": "dig.md",
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"text": "Returns the target value in a nested JSON object, based on the given key.\n\nUse the `in` operator to check if `target` exists in `obj`.\nIf found, return the value of `obj[target]`, otherwise use `Object.values(obj)` and `Array.prototype.reduce()` to recursively call `dig` on each nested object until the first matching key/value pair is found.",
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"codeBlocks": {
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"es6": "const dig = (obj, target) =>\n target in obj\n ? obj[target]\n : Object.values(obj).reduce((acc, val) => {\n if (acc !== undefined) return acc;\n if (typeof val === 'object') return dig(val, target);\n }, undefined);",
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"es6": "const dig = (obj, target) =>\n target in obj\n ? obj[target]\n : Object.values(obj).reduce((acc, val) => {\n if (acc !== undefined) return acc;\n if (typeof val === 'object') return dig(val, target);\n }, undefined);",
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"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar dig = function dig(obj, target) {\n return target in obj ? obj[target] : Object.values(obj).reduce(function (acc, val) {\n if (acc !== undefined) return acc;\n if (_typeof(val) === 'object') return dig(val, target);\n }, undefined);\n};",
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"example": "const data = {\n level1: {\n level2: {\n level3: 'some data'\n }\n }\n};\ndig(data, 'level3'); // 'some data'\ndig(data, 'level4'); // undefined"
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},
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@ -1389,7 +1389,7 @@
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{
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@ -1703,7 +1703,7 @@
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"fileName": "factorial.md",
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"text": "Calculates the factorial of a number.\n\nUse recursion.\nIf `n` is less than or equal to `1`, return `1`.\nOtherwise, return the product of `n` and the factorial of `n - 1`.\nThrows an exception if `n` is a negative number.",
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"codeBlocks": {
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"es6": "const factorial = n =>\n n < 0\n ? (() => {\n throw new TypeError('Negative numbers are not allowed!');\n })()\n : n <= 1\n ? 1\n : n * factorial(n - 1);",
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"es6": "const factorial = n =>\n n < 0\n ? (() => {\n throw new TypeError('Negative numbers are not allowed!');\n })()\n : n <= 1\n ? 1\n : n * factorial(n - 1);",
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"es5": "var factorial = function factorial(n) {\n return n < 0 ? function () {\n throw new TypeError('Negative numbers are not allowed!');\n }() : n <= 1 ? 1 : n * factorial(n - 1);\n};",
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"example": "factorial(6); // 720"
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},
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@ -1715,7 +1715,7 @@
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@ -3962,7 +3962,7 @@
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{
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@ -4983,7 +4983,7 @@
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"codeBlocks": {
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"es6": "const pipeAsyncFunctions = (...fns) => arg => fns.reduce((p, f) => p.then(f), Promise.resolve(arg));",
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"es5": "var pipeAsyncFunctions = function pipeAsyncFunctions() {\n for (var _len = arguments.length, fns = new Array(_len), _key = 0; _key < _len; _key++) {\n fns[_key] = arguments[_key];\n }\n\n return function (arg) {\n return fns.reduce(function (p, f) {\n return p.then(f);\n }, Promise.resolve(arg));\n };\n};",
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"example": "const sum = pipeAsyncFunctions(\n x => x + 1,\n x => new Promise(resolve => setTimeout(() => resolve(x + 2), 1000)),\n x => x + 3,\n async x => (await x) + 4\n);\n(async () => {\n console.log(await sum(5)); // 15 (after one second)\n})();"
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"example": "const sum = pipeAsyncFunctions(\n x => x + 1,\n x => new Promise(resolve => setTimeout(() => resolve(x + 2), 1000)),\n x => x + 3,\n async x => (await x) + 4\n);\n(async() => {\n console.log(await sum(5)); // 15 (after one second)\n})();"
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},
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"tags": [
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"adapter",
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@ -4994,7 +4994,7 @@
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},
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"meta": {
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{
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@ -5530,7 +5530,7 @@
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"fileName": "remove.md",
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"text": "Removes elements from an array for which the given function returns `false`.\n\nUse `Array.prototype.filter()` to find array elements that return truthy values and `Array.prototype.reduce()` to remove elements using `Array.prototype.splice()`.\nThe `func` is invoked with three arguments (`value, index, array`).",
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"codeBlocks": {
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"es6": "const remove = (arr, func) =>\n Array.isArray(arr)\n ? arr.filter(func).reduce((acc, val) => {\n arr.splice(arr.indexOf(val), 1);\n return acc.concat(val);\n }, [])\n : [];",
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"es6": "const remove = (arr, func) =>\n Array.isArray(arr)\n ? arr.filter(func).reduce((acc, val) => {\n arr.splice(arr.indexOf(val), 1);\n return acc.concat(val);\n }, [])\n : [];",
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"es5": "var remove = function remove(arr, func) {\n return Array.isArray(arr) ? arr.filter(func).reduce(function (acc, val) {\n arr.splice(arr.indexOf(val), 1);\n return acc.concat(val);\n }, []) : [];\n};",
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"example": "remove([1, 2, 3, 4], n => n % 2 === 0); // [2, 4]"
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},
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@ -5541,7 +5541,7 @@
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},
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"meta": {
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@ -7289,6 +7289,27 @@
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{
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"id": "vectorDistance",
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"type": "snippet",
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"attributes": {
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"fileName": "vectorDistance.md",
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"text": "Returns the distance between two vectors.\n\nUse `Array.prototype.reduce()`, `Math.pow()` and `Math.sqrt()` to calculate the Euclidean distance between two vectors.",
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"codeBlocks": {
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"es6": "const vectorDistance = (...coords) => {\n let pointLength = Math.trunc(coords.length / 2);\n let sum = coords\n .slice(0, pointLength)\n .reduce((acc, val, i) => acc + Math.pow(val - coords[pointLength + i], 2), 0);\n return Math.sqrt(sum);\n};",
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"es5": "var vectorDistance = function vectorDistance() {\n for (var _len = arguments.length, coords = new Array(_len), _key = 0; _key < _len; _key++) {\n coords[_key] = arguments[_key];\n }\n\n var pointLength = Math.trunc(coords.length / 2);\n var sum = coords.slice(0, pointLength).reduce(function (acc, val, i) {\n return acc + Math.pow(val - coords[pointLength + i], 2);\n }, 0);\n return Math.sqrt(sum);\n};",
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"example": "vectorDistance(10, 0, 5, 20, 0, 10); // 11.180339887498949"
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},
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"tags": [
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"math",
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"beginner"
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]
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},
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"meta": {
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"id": "when",
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"type": "snippet",
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