152 lines
64 KiB
HTML
152 lines
64 KiB
HTML
<!DOCTYPE html><html lang="en"><head><script async src="https://www.googletagmanager.com/gtag/js?id=UA-117141635-1"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-117141635-1")</script><link rel="stylesheet" href="./mini.css"><title>Adapter - 30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta name="theme-color" content="#111"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="https://30secondsofcode.org/logos/logo_512.png"><link rel="icon" type="image/png" href="./logos/logo_128.png"><link rel="manifest" href="manifest.json"><script>const search = (node) => {
|
|
let matchingTags = [];
|
|
Array.from(node.parentElement.parentElement.getElementsByTagName('a')).forEach(x => {
|
|
let data = [x.textContent.toLowerCase(), ...x.getAttribute('tags').split(',')].map(v => !!(v.indexOf(node.value.toLowerCase()) + 1));
|
|
if(data.includes(true)){
|
|
x.style.display = '';
|
|
matchingTags.push(x.getAttribute('tags').split(',')[0]);
|
|
}
|
|
else x.style.display = 'none';
|
|
});
|
|
Array.from(node.parentElement.parentElement.getElementsByTagName('h3')).forEach(x => {
|
|
x.style.display = matchingTags.includes(x.textContent.toLowerCase()) ? '' : 'none';
|
|
})
|
|
}
|
|
function scrollToTop(){
|
|
const c = document.querySelector('main').scrollTop;
|
|
if (c > 0) {
|
|
window.requestAnimationFrame(scrollToTop);
|
|
document.querySelector('main').scrollTo(0, c - c / 4);
|
|
}
|
|
};
|
|
function scrollTo(element, to, id, duration) {
|
|
if (duration <= 0) return;
|
|
var difference = to - element.scrollTop;
|
|
var perTick = difference / duration * 40;
|
|
|
|
setTimeout(function() {
|
|
element.scrollTop = element.scrollTop + perTick;
|
|
if (element.scrollTop === to) {
|
|
window.location.href = "#"+id;
|
|
return;
|
|
}
|
|
scrollTo(element, to, id, duration - 40);
|
|
}, 40);
|
|
};
|
|
function loader() {
|
|
registerClickListener();
|
|
document.querySelector('nav').scrollTop = Array.from(document.querySelectorAll('h3')).filter(v => v.innerHTML === 'Adapter')[0].offsetTop - 60;
|
|
}
|
|
function registerClickListener() {
|
|
document.addEventListener('click', function (event) {
|
|
if( document.getElementById('doc-drawer-checkbox').checked ) {
|
|
if(!document.querySelector('nav').contains(event.target) && !event.target.classList.contains('drawer-toggle') && !event.target.classList.contains('drawer')) {
|
|
document.getElementById('doc-drawer-checkbox').checked = false;
|
|
}
|
|
}
|
|
if ( event.target.classList.contains('collapse') ) {
|
|
event.target.classList = event.target.classList.contains('toggled') ? 'collapse' : 'collapse toggled';
|
|
}
|
|
else if (event.target.classList.contains('clipboard-copy')) {
|
|
const text = event.target.parentElement.parentElement.querySelector(':not(pre) + pre').textContent;
|
|
const textArea = document.createElement("textarea");
|
|
textArea.value = text.trim();
|
|
document.body.appendChild(textArea);
|
|
textArea.select();
|
|
document.execCommand("Copy");
|
|
document.body.removeChild(textArea);
|
|
let tst = document.createElement('div');
|
|
tst.classList = 'toast';
|
|
tst.innerHTML = 'Snippet copied to clipboard!';
|
|
document.body.appendChild(tst);
|
|
setTimeout(function() {
|
|
tst.style.opacity = 0;
|
|
setTimeout(function() {
|
|
document.body.removeChild(tst);
|
|
},300);
|
|
},1700);
|
|
}
|
|
else if (event.target.classList.contains('scroll-to-top')){
|
|
scrollToTop();
|
|
}
|
|
else if (event.target.classList.contains('sublink-1')){
|
|
if(event.target.getAttribute("href").includes('./')) return;
|
|
event.preventDefault();
|
|
scrollTo(document.querySelector('main'), document.getElementById(event.target.href.split('#')[1]).parentElement.offsetTop - 60, event.target.href.split('#')[1], 400);
|
|
document.getElementById('doc-drawer-checkbox').checked = false;
|
|
}
|
|
}, false);
|
|
}</script></head><body onload="loader()"><a href="https://github.com/Chalarangelo/30-seconds-of-code" class="github-corner" aria-label="View source on Github"><svg width="56" height="56" viewBox="0 0 250 250" style="fill:#151513;color:#fff;position:fixed;top:0;border:0;right:0;z-index:1000" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin:130px 106px" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style><header style="height:3.5rem;box-sizing:border-box;overflow:hidden"><h1 class="logo"><a href="./index"><img src="favicon.png" style="height:3.5rem" alt="logo"/><span id="title"> 30 seconds of code</span> <small>Curated collection of useful JavaScript snippets that you can understand in 30 seconds or less.</small></a></h1><label for="doc-drawer-checkbox" class="button drawer-toggle" id="menu-toggle"></label></header><div class="row" style="height:calc(100vh - 3.5rem);overflow:hidden"><input id="doc-drawer-checkbox" class="drawer" value="on" type="checkbox"><nav class="col-md-4 col-lg-3" style="border-top:0"><div class="input-group vertical"><input class="search" type="text" id="searchInput" onkeyup="search(this)" placeholder="Search..."></div><h3>Adapter</h3><a class="sublink-1" tags="adapter,function" href="#ary">ary</a> <a class="sublink-1" tags="adapter,function" href="#call">call</a> <a class="sublink-1" tags="adapter,function,array" href="#collectinto">collectInto</a> <a class="sublink-1" tags="adapter,function" href="#flip">flip</a> <a class="sublink-1" tags="adapter,function" href="#over">over</a> <a class="sublink-1" tags="adapter,function" href="#overargs">overArgs</a> <a class="sublink-1" tags="adapter,function,promise" href="#pipeasyncfunctions">pipeAsyncFunctions</a> <a class="sublink-1" tags="adapter,function" href="#pipefunctions">pipeFunctions</a> <a class="sublink-1" tags="adapter,function,promise" href="#promisify">promisify</a> <a class="sublink-1" tags="adapter,function" href="#rearg">rearg</a> <a class="sublink-1" tags="adapter" href="#spreadover">spreadOver</a> <a class="sublink-1" tags="adapter,function" href="#unary">unary</a><h3>Array</h3><a class="sublink-1" tags="array,function" href="./array#all">all</a> <a class="sublink-1" tags="array,function" href="./array#any">any</a> <a class="sublink-1" tags="array" href="./array#bifurcate">bifurcate</a> <a class="sublink-1" tags="array,function" href="./array#bifurcateby">bifurcateBy</a> <a class="sublink-1" tags="array" href="./array#chunk">chunk</a> <a class="sublink-1" tags="array" href="./array#compact">compact</a> <a class="sublink-1" tags="array,object" href="./array#countby">countBy</a> <a class="sublink-1" tags="array" href="./array#countoccurrences">countOccurrences</a> <a class="sublink-1" tags="array,recursion" href="./array#deepflatten">deepFlatten</a> <a class="sublink-1" tags="array,math" href="./array#difference">difference</a> <a class="sublink-1" tags="array,function" href="./array#differenceby">differenceBy</a> <a class="sublink-1" tags="array,function" href="./array#differencewith">differenceWith</a> <a class="sublink-1" tags="array" href="./array#drop">drop</a> <a class="sublink-1" tags="array" href="./array#dropright">dropRight</a> <a class="sublink-1" tags="array,function" href="./array#droprightwhile">dropRightWhile</a> <a class="sublink-1" tags="array,function" href="./array#dropwhile">dropWhile</a> <a class="sublink-1" tags="array" href="./array#everynth">everyNth</a> <a class="sublink-1" tags="array" href="./array#filternonunique">filterNonUnique</a> <a class="sublink-1" tags="array" href="./array#findlast">findLast</a> <a class="sublink-1" tags="array,function" href="./array#findlastindex">findLastIndex</a> <a class="sublink-1" tags="array" href="./array#flatten">flatten</a> <a class="sublink-1" tags="array,function" href="./array#foreachright">forEachRight</a> <a class="sublink-1" tags="array,object" href="./array#groupby">groupBy</a> <a class="sublink-1" tags="array" href="./array#head">head</a> <a class="sublink-1" tags="array" href="./array#indexofall">indexOfAll</a> <a class="sublink-1" tags="array" href="./array#initial">initial</a> <a class="sublink-1" tags="array" href="./array#initialize2darray">initialize2DArray</a> <a class="sublink-1" tags="array,math" href="./array#initializearraywithrange">initializeArrayWithRange</a> <a class="sublink-1" tags="array,math" href="./array#initializearraywithrangeright">initializeArrayWithRangeRight</a> <a class="sublink-1" tags="array,math" href="./array#initializearraywithvalues">initializeArrayWithValues</a> <a class="sublink-1" tags="array,math" href="./array#intersection">intersection</a> <a class="sublink-1" tags="array,function" href="./array#intersectionby">intersectionBy</a> <a class="sublink-1" tags="array,function" href="./array#intersectionwith">intersectionWith</a> <a class="sublink-1" tags="array" href="./array#issorted">isSorted</a> <a class="sublink-1" tags="array" href="./array#join">join</a> <a class="sublink-1" tags="array" href="./array#last">last</a> <a class="sublink-1" tags="array,string,utility" href="./array#longestitem">longestItem</a> <a class="sublink-1" tags="array,object,advanced" href="./array#mapobject">mapObject</a> <a class="sublink-1" tags="array,math" href="./array#maxn">maxN</a> <a class="sublink-1" tags="array,math" href="./array#minn">minN</a> <a class="sublink-1" tags="array,function" href="./array#none">none</a> <a class="sublink-1" tags="array" href="./array#nthelement">nthElement</a> <a class="sublink-1" tags="array,object,function" href="./array#partition">partition</a> <a class="sublink-1" tags="array,recursion" href="./array#permutations">permutations</a> <a class="sublink-1" tags="array" href="./array#pull">pull</a> <a class="sublink-1" tags="array" href="./array#pullatindex">pullAtIndex</a> <a class="sublink-1" tags="array" href="./array#pullatvalue">pullAtValue</a> <a class="sublink-1" tags="array,function,advanced" href="./array#pullby">pullBy</a> <a class="sublink-1" tags="array" href="./array#reducedfilter">reducedFilter</a> <a class="sublink-1" tags="array,function" href="./array#reducesuccessive">reduceSuccessive</a> <a class="sublink-1" tags="array,function" href="./array#reducewhich">reduceWhich</a> <a class="sublink-1" tags="array" href="./array#remove">remove</a> <a class="sublink-1" tags="array,random" href="./array#sample">sample</a> <a class="sublink-1" tags="array,random" href="./array#samplesize">sampleSize</a> <a class="sublink-1" tags="array,random" href="./array#shuffle">shuffle</a> <a class="sublink-1" tags="array,math" href="./array#similarity">similarity</a> <a class="sublink-1" tags="array,math" href="./array#sortedindex">sortedIndex</a> <a class="sublink-1" tags="array,math,function" href="./array#sortedindexby">sortedIndexBy</a> <a class="sublink-1" tags="array,math" href="./array#sortedlastindex">sortedLastIndex</a> <a class="sublink-1" tags="array,math,function" href="./array#sortedlastindexby">sortedLastIndexBy</a> <a class="sublink-1" tags="array,sort,advanced" href="./array#stablesort">stableSort</a> <a class="sublink-1" tags="array,math" href="./array#symmetricdifference">symmetricDifference</a> <a class="sublink-1" tags="array,function" href="./array#symmetricdifferenceby">symmetricDifferenceBy</a> <a class="sublink-1" tags="array,function" href="./array#symmetricdifferencewith">symmetricDifferenceWith</a> <a class="sublink-1" tags="array" href="./array#tail">tail</a> <a class="sublink-1" tags="array" href="./array#take">take</a> <a class="sublink-1" tags="array" href="./array#takeright">takeRight</a> <a class="sublink-1" tags="array,function" href="./array#takerightwhile">takeRightWhile</a> <a class="sublink-1" tags="array,function" href="./array#takewhile">takeWhile</a> <a class="sublink-1" tags="array,math" href="./array#union">union</a> <a class="sublink-1" tags="array,function" href="./array#unionby">unionBy</a> <a class="sublink-1" tags="array,function" href="./array#unionwith">unionWith</a> <a class="sublink-1" tags="array" href="./array#uniqueelements">uniqueElements</a> <a class="sublink-1" tags="array" href="./array#unzip">unzip</a> <a class="sublink-1" tags="array,function,advanced" href="./array#unzipwith">unzipWith</a> <a class="sublink-1" tags="array" href="./array#without">without</a> <a class="sublink-1" tags="array,math" href="./array#xprod">xProd</a> <a class="sublink-1" tags="array" href="./array#zip">zip</a> <a class="sublink-1" tags="array,object" href="./array#zipobject">zipObject</a> <a class="sublink-1" tags="array,function,advanced" href="./array#zipwith">zipWith</a><h3>Browser</h3><a class="sublink-1" tags="browser,array" href="./browser#arraytohtmllist">arrayToHtmlList</a> <a class="sublink-1" tags="browser" href="./browser#bottomvisible">bottomVisible</a> <a class="sublink-1" tags="browser,string,advanced" href="./browser#copytoclipboard">copyToClipboard</a> <a class="sublink-1" tags="browser,utility" href="./browser#createelement">createElement</a> <a class="sublink-1" tags="browser,event,advanced" href="./browser#createeventhub">createEventHub</a> <a class="sublink-1" tags="browser,url" href="./browser#currenturl">currentURL</a> <a class="sublink-1" tags="browser" href="./browser#detectdevicetype">detectDeviceType</a> <a class="sublink-1" tags="browser" href="./browser#elementisvisibleinviewport">elementIsVisibleInViewport</a> <a class="sublink-1" tags="browser" href="./browser#getscrollposition">getScrollPosition</a> <a class="sublink-1" tags="browser,css" href="./browser#getstyle">getStyle</a> <a class="sublink-1" tags="browser,css" href="./browser#hasclass">hasClass</a> <a class="sublink-1" tags="browser,utility,advanced,promise" href="./browser#hashbrowser">hashBrowser</a> <a class="sublink-1" tags="browser,css" href="./browser#hide">hide</a> <a class="sublink-1" tags="browser,url" href="./browser#httpsredirect">httpsRedirect</a> <a class="sublink-1" tags="browser,event,advanced" href="./browser#observemutations">observeMutations</a> <a class="sublink-1" tags="browser,event" href="./browser#off">off</a> <a class="sublink-1" tags="browser,event" href="./browser#on">on</a> <a class="sublink-1" tags="browser,event,advanced" href="./browser#onuserinputchange">onUserInputChange</a> <a class="sublink-1" tags="browser,utility" href="./browser#prefix">prefix</a> <a class="sublink-1" tags="browser,utility" href="./browser#recordanimationframes">recordAnimationFrames</a> <a class="sublink-1" tags="browser,url" href="./browser#redirect">redirect</a> <a class="sublink-1" tags="browser,function,advanced,promise,url" href="./browser#runasync">runAsync</a> <a class="sublink-1" tags="browser" href="./browser#scrolltotop">scrollToTop</a> <a class="sublink-1" tags="browser" href="./browser#setstyle">setStyle</a> <a class="sublink-1" tags="browser,css" href="./browser#show">show</a> <a class="sublink-1" tags="browser,css" href="./browser#smoothscroll">smoothScroll</a> <a class="sublink-1" tags="browser" href="./browser#toggleclass">toggleClass</a> <a class="sublink-1" tags="browser,utility,random" href="./browser#uuidgeneratorbrowser">UUIDGeneratorBrowser</a><h3>Date</h3><a class="sublink-1" tags="date,math,string,utility" href="./date#formatduration">formatDuration</a> <a class="sublink-1" tags="date" href="./date#getcolontimefromdate">getColonTimeFromDate</a> <a class="sublink-1" tags="date" href="./date#getdaysdiffbetweendates">getDaysDiffBetweenDates</a> <a class="sublink-1" tags="date" href="./date#getmeridiemsuffixofinteger">getMeridiemSuffixOfInteger</a> <a class="sublink-1" tags="date" href="./date#tomorrow">tomorrow</a><h3>Function</h3><a class="sublink-1" tags="function" href="./function#attempt">attempt</a> <a class="sublink-1" tags="function,object" href="./function#bind">bind</a> <a class="sublink-1" tags="function,object" href="./function#bindkey">bindKey</a> <a class="sublink-1" tags="function" href="./function#chainasync">chainAsync</a> <a class="sublink-1" tags="function" href="./function#compose">compose</a> <a class="sublink-1" tags="function" href="./function#composeright">composeRight</a> <a class="sublink-1" tags="function" href="./function#converge">converge</a> <a class="sublink-1" tags="function,recursion" href="./function#curry">curry</a> <a class="sublink-1" tags="function" href="./function#debounce">debounce</a> <a class="sublink-1" tags="function" href="./function#defer">defer</a> <a class="sublink-1" tags="function" href="./function#delay">delay</a> <a class="sublink-1" tags="function,utility" href="./function#functionname">functionName</a> <a class="sublink-1" tags="function" href="./function#memoize">memoize</a> <a class="sublink-1" tags="function" href="./function#negate">negate</a> <a class="sublink-1" tags="function" href="./function#once">once</a> <a class="sublink-1" tags="function" href="./function#partial">partial</a> <a class="sublink-1" tags="function" href="./function#partialright">partialRight</a> <a class="sublink-1" tags="function,promise" href="./function#runpromisesinseries">runPromisesInSeries</a> <a class="sublink-1" tags="function,promise" href="./function#sleep">sleep</a> <a class="sublink-1" tags="function" href="./function#throttle">throttle</a> <a class="sublink-1" tags="function" href="./function#times">times</a> <a class="sublink-1" tags="function" href="./function#uncurry">uncurry</a> <a class="sublink-1" tags="function,array" href="./function#unfold">unfold</a><h3>Math</h3><a class="sublink-1" tags="math" href="./math#approximatelyequal">approximatelyEqual</a> <a class="sublink-1" tags="math,array" href="./math#average">average</a> <a class="sublink-1" tags="math,array,function" href="./math#averageby">averageBy</a> <a class="sublink-1" tags="math" href="./math#binomialcoefficient">binomialCoefficient</a> <a class="sublink-1" tags="math" href="./math#clampnumber">clampNumber</a> <a class="sublink-1" tags="math" href="./math#degreestorads">degreesToRads</a> <a class="sublink-1" tags="math,array" href="./math#digitize">digitize</a> <a class="sublink-1" tags="math" href="./math#distance">distance</a> <a class="sublink-1" tags="math,array,advanced" href="./math#elo">elo</a> <a class="sublink-1" tags="math,recursion" href="./math#factorial">factorial</a> <a class="sublink-1" tags="math,array" href="./math#fibonacci">fibonacci</a> <a class="sublink-1" tags="math,recursion" href="./math#gcd">gcd</a> <a class="sublink-1" tags="math" href="./math#geometricprogression">geometricProgression</a> <a class="sublink-1" tags="math" href="./math#hammingdistance">hammingDistance</a> <a class="sublink-1" tags="math" href="./math#inrange">inRange</a> <a class="sublink-1" tags="math" href="./math#isdivisible">isDivisible</a> <a class="sublink-1" tags="math" href="./math#iseven">isEven</a> <a class="sublink-1" tags="math" href="./math#isprime">isPrime</a> <a class="sublink-1" tags="math,recursion" href="./math#lcm">lcm</a> <a class="sublink-1" tags="math,utility" href="./math#luhncheck">luhnCheck</a> <a class="sublink-1" tags="math,array,function" href="./math#maxby">maxBy</a> <a class="sublink-1" tags="math,array" href="./math#median">median</a> <a class="sublink-1" tags="math,array,function" href="./math#minby">minBy</a> <a class="sublink-1" tags="math" href="./math#percentile">percentile</a> <a class="sublink-1" tags="math" href="./math#powerset">powerset</a> <a class="sublink-1" tags="math,array" href="./math#primes">primes</a> <a class="sublink-1" tags="math" href="./math#radstodegrees">radsToDegrees</a> <a class="sublink-1" tags="math,utility,random" href="./math#randomintarrayinrange">randomIntArrayInRange</a> <a class="sublink-1" tags="math,utility,random" href="./math#randomintegerinrange">randomIntegerInRange</a> <a class="sublink-1" tags="math,utility,random" href="./math#randomnumberinrange">randomNumberInRange</a> <a class="sublink-1" tags="math" href="./math#round">round</a> <a class="sublink-1" tags="math,utility" href="./math#sdbm">sdbm</a> <a class="sublink-1" tags="math,array" href="./math#standarddeviation">standardDeviation</a> <a class="sublink-1" tags="math,array" href="./math#sum">sum</a> <a class="sublink-1" tags="math,array,function" href="./math#sumby">sumBy</a> <a class="sublink-1" tags="math" href="./math#sumpower">sumPower</a> <a class="sublink-1" tags="math" href="./math#tosafeinteger">toSafeInteger</a><h3>Node</h3><a class="sublink-1" tags="node,string,utility" href="./node#atob">atob</a> <a class="sublink-1" tags="node,string,utility" href="./node#btoa">btoa</a> <a class="sublink-1" tags="node,utility,string" href="./node#colorize">colorize</a> <a class="sublink-1" tags="node" href="./node#hasflags">hasFlags</a> <a class="sublink-1" tags="node,utility,promise" href="./node#hashnode">hashNode</a> <a class="sublink-1" tags="node" href="./node#istravisci">isTravisCI</a> <a class="sublink-1" tags="node,json" href="./node#jsontofile">JSONToFile</a> <a class="sublink-1" tags="node,array,string" href="./node#readfilelines">readFileLines</a> <a class="sublink-1" tags="node,string" href="./node#untildify">untildify</a> <a class="sublink-1" tags="node,utility,random" href="./node#uuidgeneratornode">UUIDGeneratorNode</a><h3>Object</h3><a class="sublink-1" tags="object,function" href="./object#bindall">bindAll</a> <a class="sublink-1" tags="object,recursion" href="./object#deepclone">deepClone</a> <a class="sublink-1" tags="object" href="./object#defaults">defaults</a> <a class="sublink-1" tags="object,array,type,advanced" href="./object#equals">equals</a> <a class="sublink-1" tags="object,function" href="./object#findkey">findKey</a> <a class="sublink-1" tags="object,function" href="./object#findlastkey">findLastKey</a> <a class="sublink-1" tags="object,recursion" href="./object#flattenobject">flattenObject</a> <a class="sublink-1" tags="object" href="./object#forown">forOwn</a> <a class="sublink-1" tags="object" href="./object#forownright">forOwnRight</a> <a class="sublink-1" tags="object,function" href="./object#functions">functions</a> <a class="sublink-1" tags="object" href="./object#get">get</a> <a class="sublink-1" tags="object,function" href="./object#invertkeyvalues">invertKeyValues</a> <a class="sublink-1" tags="object" href="./object#lowercasekeys">lowercaseKeys</a> <a class="sublink-1" tags="object,function" href="./object#mapkeys">mapKeys</a> <a class="sublink-1" tags="object,function" href="./object#mapvalues">mapValues</a> <a class="sublink-1" tags="object,type" href="./object#matches">matches</a> <a class="sublink-1" tags="object,type,function" href="./object#matcheswith">matchesWith</a> <a class="sublink-1" tags="object,array" href="./object#merge">merge</a> <a class="sublink-1" tags="object" href="./object#nest">nest</a> <a class="sublink-1" tags="object,array" href="./object#objectfrompairs">objectFromPairs</a> <a class="sublink-1" tags="object,array" href="./object#objecttopairs">objectToPairs</a> <a class="sublink-1" tags="object,array" href="./object#omit">omit</a> <a class="sublink-1" tags="object,array,function" href="./object#omitby">omitBy</a> <a class="sublink-1" tags="object,array" href="./object#orderby">orderBy</a> <a class="sublink-1" tags="object,array" href="./object#pick">pick</a> <a class="sublink-1" tags="object,array,function" href="./object#pickby">pickBy</a> <a class="sublink-1" tags="object" href="./object#shallowclone">shallowClone</a> <a class="sublink-1" tags="object,array,string" href="./object#size">size</a> <a class="sublink-1" tags="object,array" href="./object#transform">transform</a> <a class="sublink-1" tags="object,logic,array" href="./object#truthcheckcollection">truthCheckCollection</a> <a class="sublink-1" tags="object,advanced" href="./object#unflattenobject">unflattenObject</a><h3>String</h3><a class="sublink-1" tags="string" href="./string#bytesize">byteSize</a> <a class="sublink-1" tags="string,array" href="./string#capitalize">capitalize</a> <a class="sublink-1" tags="string,regexp" href="./string#capitalizeeveryword">capitalizeEveryWord</a> <a class="sublink-1" tags="string,array" href="./string#decapitalize">decapitalize</a> <a class="sublink-1" tags="string,browser,regexp" href="./string#escapehtml">escapeHTML</a> <a class="sublink-1" tags="string,regexp" href="./string#escaperegexp">escapeRegExp</a> <a class="sublink-1" tags="string" href="./string#fromcamelcase">fromCamelCase</a> <a class="sublink-1" tags="string,utility,browser,url" href="./string#isabsoluteurl">isAbsoluteURL</a> <a class="sublink-1" tags="string,regexp" href="./string#isanagram">isAnagram</a> <a class="sublink-1" tags="string,utility" href="./string#islowercase">isLowerCase</a> <a class="sublink-1" tags="string,utility" href="./string#isuppercase">isUpperCase</a> <a class="sublink-1" tags="string,utility,regexp" href="./string#mask">mask</a> <a class="sublink-1" tags="string" href="./string#pad">pad</a> <a class="sublink-1" tags="string" href="./string#palindrome">palindrome</a> <a class="sublink-1" tags="string" href="./string#pluralize">pluralize</a> <a class="sublink-1" tags="string,regexp" href="./string#removenonascii">removeNonASCII</a> <a class="sublink-1" tags="string,array" href="./string#reversestring">reverseString</a> <a class="sublink-1" tags="string" href="./string#sortcharactersinstring">sortCharactersInString</a> <a class="sublink-1" tags="string" href="./string#splitlines">splitLines</a> <a class="sublink-1" tags="string,recursion" href="./string#stringpermutations">stringPermutations</a> <a class="sublink-1" tags="string,utility,regexp" href="./string#striphtmltags">stripHTMLTags</a> <a class="sublink-1" tags="string,regexp" href="./string#tocamelcase">toCamelCase</a> <a class="sublink-1" tags="string,regexp" href="./string#tokebabcase">toKebabCase</a> <a class="sublink-1" tags="string,regexp" href="./string#tosnakecase">toSnakeCase</a> <a class="sublink-1" tags="string" href="./string#truncatestring">truncateString</a> <a class="sublink-1" tags="string,browser" href="./string#unescapehtml">unescapeHTML</a> <a class="sublink-1" tags="string,utility,regexp" href="./string#urljoin">URLJoin</a> <a class="sublink-1" tags="string,regexp" href="./string#words">words</a><h3>Type</h3><a class="sublink-1" tags="type" href="./type#gettype">getType</a> <a class="sublink-1" tags="type,array,regexp" href="./type#is">is</a> <a class="sublink-1" tags="type,array" href="./type#isarraylike">isArrayLike</a> <a class="sublink-1" tags="type" href="./type#isboolean">isBoolean</a> <a class="sublink-1" tags="type,array,object,string" href="./type#isempty">isEmpty</a> <a class="sublink-1" tags="type,function" href="./type#isfunction">isFunction</a> <a class="sublink-1" tags="type" href="./type#isnil">isNil</a> <a class="sublink-1" tags="type" href="./type#isnull">isNull</a> <a class="sublink-1" tags="type,math" href="./type#isnumber">isNumber</a> <a class="sublink-1" tags="type,object" href="./type#isobject">isObject</a> <a class="sublink-1" tags="type,object" href="./type#isobjectlike">isObjectLike</a> <a class="sublink-1" tags="type,object" href="./type#isplainobject">isPlainObject</a> <a class="sublink-1" tags="type,function,array,string" href="./type#isprimitive">isPrimitive</a> <a class="sublink-1" tags="type,function,promise" href="./type#ispromiselike">isPromiseLike</a> <a class="sublink-1" tags="type,string" href="./type#isstring">isString</a> <a class="sublink-1" tags="type" href="./type#issymbol">isSymbol</a> <a class="sublink-1" tags="type" href="./type#isundefined">isUndefined</a> <a class="sublink-1" tags="type,json" href="./type#isvalidjson">isValidJSON</a><h3>Utility</h3><a class="sublink-1" tags="utility,array,type" href="./utility#castarray">castArray</a> <a class="sublink-1" tags="utility,regexp" href="./utility#cloneregexp">cloneRegExp</a> <a class="sublink-1" tags="utility" href="./utility#coalesce">coalesce</a> <a class="sublink-1" tags="utility" href="./utility#coalescefactory">coalesceFactory</a> <a class="sublink-1" tags="utility,string" href="./utility#extendhex">extendHex</a> <a class="sublink-1" tags="utility,browser,string,url" href="./utility#geturlparameters">getURLParameters</a> <a class="sublink-1" tags="utility,string,math,advanced" href="./utility#hextorgb">hexToRGB</a> <a class="sublink-1" tags="utility,url,browser" href="./utility#httpget">httpGet</a> <a class="sublink-1" tags="utility,url,browser" href="./utility#httppost">httpPost</a> <a class="sublink-1" tags="utility,browser" href="./utility#isbrowser">isBrowser</a> <a class="sublink-1" tags="utility,function" href="./utility#mostperformant">mostPerformant</a> <a class="sublink-1" tags="utility,function" href="./utility#ntharg">nthArg</a> <a class="sublink-1" tags="utility,string" href="./utility#parsecookie">parseCookie</a> <a class="sublink-1" tags="utility,string,math" href="./utility#prettybytes">prettyBytes</a> <a class="sublink-1" tags="utility,random" href="./utility#randomhexcolorcode">randomHexColorCode</a> <a class="sublink-1" tags="utility" href="./utility#rgbtohex">RGBToHex</a> <a class="sublink-1" tags="utility,string" href="./utility#serializecookie">serializeCookie</a> <a class="sublink-1" tags="utility" href="./utility#timetaken">timeTaken</a> <a class="sublink-1" tags="utility" href="./utility#tocurrency">toCurrency</a> <a class="sublink-1" tags="utility,math" href="./utility#todecimalmark">toDecimalMark</a> <a class="sublink-1" tags="utility,math" href="./utility#toordinalsuffix">toOrdinalSuffix</a> <a class="sublink-1" tags="utility,math" href="./utility#validatenumber">validateNumber</a> <a class="sublink-1" tags="utility,regexp" href="./utility#yesno">yesNo</a></nav><main class="col-sm-12 col-md-8 col-lg-9" style="height:100%;overflow-y:auto;background:#eceef2;padding:0"><a id="top"> </a><h2 style="text-align:center">Adapter</h2><div class="card fluid"><h3 id="ary" class="section double-padded">ary</h3><div class="section double-padded"><p>Creates a function that accepts up to <code>n</code> arguments, ignoring any additional arguments.</p><p>Call the provided function, <code>fn</code>, with up to <code>n</code> arguments, using <code>Array.slice(0,n)</code> and the spread operator (<code>...</code>).</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">ary</span> <span class="token operator">=</span> <span class="token punctuation">(</span>fn<span class="token punctuation">,</span> n<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">fn</span><span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> n<span class="token punctuation">));</span>
|
|
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> firstTwoMax <span class="token operator">=</span> <span class="token function">ary</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span>max<span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">);
|
|
[[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">6</span><span class="token punctuation">,</span> <span class="token string">'a'</span><span class="token punctuation">], [</span><span class="token number">8</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">6</span><span class="token punctuation">], [</span><span class="token number">10</span><span class="token punctuation">]].</span><span class="token function">map</span><span class="token punctuation">(</span>x <span class="token operator">=></span> <span class="token function">firstTwoMax</span><span class="token punctuation">(</span><span class="token operator">...</span>x<span class="token punctuation">));</span> <span class="token comment">// [6, 8, 10]</span>
|
|
</pre><button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><div class="card fluid"><h3 id="call" class="section double-padded">call</h3><div class="section double-padded"><p>Given a key and a set of arguments, call them when given a context. Primarily useful in composition.</p><p>Use a closure to call a stored key with stored arguments.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">call</span> <span class="token operator">=</span> <span class="token punctuation">(</span>key<span class="token punctuation">,</span> <span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> context <span class="token operator">=></span> context<span class="token punctuation">[</span>key<span class="token punctuation">](</span><span class="token operator">...</span>args<span class="token punctuation">);</span>
|
|
</pre><label class="collapse">Show examples</label><pre class="language-js">Promise<span class="token punctuation">.</span><span class="token function">resolve</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">])
|
|
.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token function">call</span><span class="token punctuation">(</span><span class="token string">'map'</span><span class="token punctuation">,</span> x <span class="token operator">=></span> <span class="token number">2</span> <span class="token operator">*</span> x<span class="token punctuation">))
|
|
.</span><span class="token function">then</span><span class="token punctuation">(</span>console<span class="token punctuation">.</span>log<span class="token punctuation">);</span> <span class="token comment">//[ 2, 4, 6 ]</span>
|
|
<span class="token keyword">const</span> map <span class="token operator">=</span> call<span class="token punctuation">.</span><span class="token function">bind</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">,</span> <span class="token string">'map'</span><span class="token punctuation">);</span>
|
|
Promise<span class="token punctuation">.</span><span class="token function">resolve</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">])
|
|
.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token function">map</span><span class="token punctuation">(</span>x <span class="token operator">=></span> <span class="token number">2</span> <span class="token operator">*</span> x<span class="token punctuation">))
|
|
.</span><span class="token function">then</span><span class="token punctuation">(</span>console<span class="token punctuation">.</span>log<span class="token punctuation">);</span> <span class="token comment">//[ 2, 4, 6 ]</span>
|
|
</pre><button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><div class="card fluid"><h3 id="collectinto" class="section double-padded">collectInto</h3><div class="section double-padded"><p>Changes a function that accepts an array into a variadic function.</p><p>Given a function, return a closure that collects all inputs into an array-accepting function.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">collectInto</span> <span class="token operator">=</span> fn <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">fn</span><span class="token punctuation">(</span>args<span class="token punctuation">);</span>
|
|
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> Pall <span class="token operator">=</span> <span class="token function">collectInto</span><span class="token punctuation">(</span>Promise<span class="token punctuation">.</span>all<span class="token punctuation">.</span><span class="token function">bind</span><span class="token punctuation">(</span>Promise<span class="token punctuation">));</span>
|
|
<span class="token keyword">let</span> p1 <span class="token operator">=</span> Promise<span class="token punctuation">.</span><span class="token function">resolve</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">);</span>
|
|
<span class="token keyword">let</span> p2 <span class="token operator">=</span> Promise<span class="token punctuation">.</span><span class="token function">resolve</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">);</span>
|
|
<span class="token keyword">let</span> p3 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Promise</span><span class="token punctuation">(</span>resolve <span class="token operator">=></span> <span class="token function">setTimeout</span><span class="token punctuation">(</span>resolve<span class="token punctuation">,</span> <span class="token number">2000</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">));</span>
|
|
<span class="token function">Pall</span><span class="token punctuation">(</span>p1<span class="token punctuation">,</span> p2<span class="token punctuation">,</span> p3<span class="token punctuation">).</span><span class="token function">then</span><span class="token punctuation">(</span>console<span class="token punctuation">.</span>log<span class="token punctuation">);</span> <span class="token comment">// [1, 2, 3] (after about 2 seconds)</span>
|
|
</pre><button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><div class="card fluid"><h3 id="flip" class="section double-padded">flip</h3><div class="section double-padded"><p>Flip takes a function as an argument, then makes the first argument the last.</p><p>Return a closure that takes variadic inputs, and splices the last argument to make it the first argument before applying the rest.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">flip</span> <span class="token operator">=</span> fn <span class="token operator">=></span> <span class="token punctuation">(</span>first<span class="token punctuation">,</span> <span class="token operator">...</span>rest<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">fn</span><span class="token punctuation">(</span><span class="token operator">...</span>rest<span class="token punctuation">,</span> first<span class="token punctuation">);</span>
|
|
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">let</span> a <span class="token operator">=</span> <span class="token punctuation">{</span> name<span class="token punctuation">:</span> <span class="token string">'John Smith'</span> <span class="token punctuation">};</span>
|
|
<span class="token keyword">let</span> b <span class="token operator">=</span> <span class="token punctuation">{};</span>
|
|
<span class="token keyword">const</span> mergeFrom <span class="token operator">=</span> <span class="token function">flip</span><span class="token punctuation">(</span>Object<span class="token punctuation">.</span>assign<span class="token punctuation">);</span>
|
|
<span class="token keyword">let</span> mergePerson <span class="token operator">=</span> mergeFrom<span class="token punctuation">.</span><span class="token function">bind</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">,</span> a<span class="token punctuation">);</span>
|
|
<span class="token function">mergePerson</span><span class="token punctuation">(</span>b<span class="token punctuation">);</span> <span class="token comment">// == b</span>
|
|
b <span class="token operator">=</span> <span class="token punctuation">{};</span>
|
|
Object<span class="token punctuation">.</span><span class="token function">assign</span><span class="token punctuation">(</span>b<span class="token punctuation">,</span> a<span class="token punctuation">);</span> <span class="token comment">// == b</span>
|
|
</pre><button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><div class="card fluid"><h3 id="over" class="section double-padded">over</h3><div class="section double-padded"><p>Creates a function that invokes each provided function with the arguments it receives and returns the results.</p><p>Use <code>Array.map()</code> and <code>Function.apply()</code> to apply each function to the given arguments.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">over</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>fns<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> fns<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span>fn <span class="token operator">=></span> fn<span class="token punctuation">.</span><span class="token function">apply</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">,</span> args<span class="token punctuation">));</span>
|
|
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> minMax <span class="token operator">=</span> <span class="token function">over</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span>min<span class="token punctuation">,</span> Math<span class="token punctuation">.</span>max<span class="token punctuation">);</span>
|
|
<span class="token function">minMax</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">);</span> <span class="token comment">// [1,5]</span>
|
|
</pre><button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><div class="card fluid"><h3 id="overargs" class="section double-padded">overArgs</h3><div class="section double-padded"><p>Creates a function that invokes the provided function with its arguments transformed.</p><p>Use <code>Array.map()</code> to apply <code>transforms</code> to <code>args</code> in combination with the spread operator (<code>...</code>) to pass the transformed arguments to <code>fn</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">overArgs</span> <span class="token operator">=</span> <span class="token punctuation">(</span>fn<span class="token punctuation">,</span> transforms<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">fn</span><span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">((</span>val<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span> transforms<span class="token punctuation">[</span>i<span class="token punctuation">](</span>val<span class="token punctuation">)));</span>
|
|
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">square</span> <span class="token operator">=</span> n <span class="token operator">=></span> n <span class="token operator">*</span> n<span class="token punctuation">;</span>
|
|
<span class="token keyword">const</span> <span class="token function-variable function">double</span> <span class="token operator">=</span> n <span class="token operator">=></span> n <span class="token operator">*</span> <span class="token number">2</span><span class="token punctuation">;</span>
|
|
<span class="token keyword">const</span> fn <span class="token operator">=</span> <span class="token function">overArgs</span><span class="token punctuation">((</span>x<span class="token punctuation">,</span> y<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">[</span>x<span class="token punctuation">,</span> y<span class="token punctuation">], [</span>square<span class="token punctuation">,</span> double<span class="token punctuation">]);</span>
|
|
<span class="token function">fn</span><span class="token punctuation">(</span><span class="token number">9</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// [81, 6]</span>
|
|
</pre><button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><div class="card fluid"><h3 id="pipeasyncfunctions" class="section double-padded">pipeAsyncFunctions</h3><div class="section double-padded"><p>Performs left-to-right function composition for asynchronous functions.</p><p>Use <code>Array.reduce()</code> with the spread operator (<code>...</code>) to perform left-to-right function composition using <code>Promise.then()</code>. The functions can return a combination of: simple values, <code>Promise</code>'s, or they can be defined as <code>async</code> ones returning through <code>await</code>. All functions must be unary.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">pipeAsyncFunctions</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>fns<span class="token punctuation">)</span> <span class="token operator">=></span> arg <span class="token operator">=></span> fns<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>p<span class="token punctuation">,</span> f<span class="token punctuation">)</span> <span class="token operator">=></span> p<span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span>f<span class="token punctuation">),</span> Promise<span class="token punctuation">.</span><span class="token function">resolve</span><span class="token punctuation">(</span>arg<span class="token punctuation">));</span>
|
|
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> sum <span class="token operator">=</span> <span class="token function">pipeAsyncFunctions</span><span class="token punctuation">(</span>
|
|
x <span class="token operator">=></span> x <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">,</span>
|
|
x <span class="token operator">=></span> <span class="token keyword">new</span> <span class="token class-name">Promise</span><span class="token punctuation">(</span>resolve <span class="token operator">=></span> <span class="token function">setTimeout</span><span class="token punctuation">(()</span> <span class="token operator">=></span> <span class="token function">resolve</span><span class="token punctuation">(</span>x <span class="token operator">+</span> <span class="token number">2</span><span class="token punctuation">),</span> <span class="token number">1000</span><span class="token punctuation">)),</span>
|
|
x <span class="token operator">=></span> x <span class="token operator">+</span> <span class="token number">3</span><span class="token punctuation">,</span>
|
|
<span class="token keyword">async</span> x <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token keyword">await</span> x<span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token number">4</span>
|
|
<span class="token punctuation">);
|
|
(</span><span class="token keyword">async</span> <span class="token punctuation">()</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
|
|
console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token keyword">await</span> <span class="token function">sum</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">));</span> <span class="token comment">// 15 (after one second)</span>
|
|
<span class="token punctuation">})();</span>
|
|
</pre><button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><div class="card fluid"><h3 id="pipefunctions" class="section double-padded">pipeFunctions</h3><div class="section double-padded"><p>Performs left-to-right function composition.</p><p>Use <code>Array.reduce()</code> with the spread operator (<code>...</code>) to perform left-to-right function composition. The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">pipeFunctions</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>fns<span class="token punctuation">)</span> <span class="token operator">=></span> fns<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>f<span class="token punctuation">,</span> g<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">g</span><span class="token punctuation">(</span><span class="token function">f</span><span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)));</span>
|
|
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">add5</span> <span class="token operator">=</span> x <span class="token operator">=></span> x <span class="token operator">+</span> <span class="token number">5</span><span class="token punctuation">;</span>
|
|
<span class="token keyword">const</span> <span class="token function-variable function">multiply</span> <span class="token operator">=</span> <span class="token punctuation">(</span>x<span class="token punctuation">,</span> y<span class="token punctuation">)</span> <span class="token operator">=></span> x <span class="token operator">*</span> y<span class="token punctuation">;</span>
|
|
<span class="token keyword">const</span> multiplyAndAdd5 <span class="token operator">=</span> <span class="token function">pipeFunctions</span><span class="token punctuation">(</span>multiply<span class="token punctuation">,</span> add5<span class="token punctuation">);</span>
|
|
<span class="token function">multiplyAndAdd5</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">);</span> <span class="token comment">// 15</span>
|
|
</pre><button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><div class="card fluid"><h3 id="promisify" class="section double-padded">promisify</h3><div class="section double-padded"><p>Converts an asynchronous function to return a promise.</p><p>Use currying to return a function returning a <code>Promise</code> that calls the original function. Use the <code>...rest</code> operator to pass in all the parameters.</p><p><em>In Node 8+, you can use <a href="https://nodejs.org/api/util.html#util_util_promisify_original"><code>util.promisify</code></a></em></p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">promisify</span> <span class="token operator">=</span> func <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span>
|
|
<span class="token keyword">new</span> <span class="token class-name">Promise</span><span class="token punctuation">((</span>resolve<span class="token punctuation">,</span> reject<span class="token punctuation">)</span> <span class="token operator">=></span>
|
|
<span class="token function">func</span><span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">, (</span>err<span class="token punctuation">,</span> result<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span>err <span class="token operator">?</span> <span class="token function">reject</span><span class="token punctuation">(</span>err<span class="token punctuation">) :</span> <span class="token function">resolve</span><span class="token punctuation">(</span>result<span class="token punctuation">)))
|
|
);</span>
|
|
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> delay <span class="token operator">=</span> <span class="token function">promisify</span><span class="token punctuation">((</span>d<span class="token punctuation">,</span> cb<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">setTimeout</span><span class="token punctuation">(</span>cb<span class="token punctuation">,</span> d<span class="token punctuation">));</span>
|
|
<span class="token function">delay</span><span class="token punctuation">(</span><span class="token number">2000</span><span class="token punctuation">).</span><span class="token function">then</span><span class="token punctuation">(()</span> <span class="token operator">=></span> console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'Hi!'</span><span class="token punctuation">));</span> <span class="token comment">// // Promise resolves after 2s</span>
|
|
</pre><button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><div class="card fluid"><h3 id="rearg" class="section double-padded">rearg</h3><div class="section double-padded"><p>Creates a function that invokes the provided function with its arguments arranged according to the specified indexes.</p><p>Use <code>Array.reduce()</code> and <code>Array.indexOf()</code> to reorder arguments based on <code>indexes</code> in combination with the spread operator (<code>...</code>) to pass the transformed arguments to <code>fn</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">rearg</span> <span class="token operator">=</span> <span class="token punctuation">(</span>fn<span class="token punctuation">,</span> indexes<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span>
|
|
<span class="token function">fn</span><span class="token punctuation">(</span>
|
|
<span class="token operator">...</span>args<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">(
|
|
(</span>acc<span class="token punctuation">,</span> val<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">((</span>acc<span class="token punctuation">[</span>indexes<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span>i<span class="token punctuation">)]</span> <span class="token operator">=</span> val<span class="token punctuation">),</span> acc<span class="token punctuation">),</span>
|
|
Array<span class="token punctuation">.</span><span class="token keyword">from</span><span class="token punctuation">({</span> length<span class="token punctuation">:</span> indexes<span class="token punctuation">.</span>length <span class="token punctuation">})
|
|
)
|
|
);</span>
|
|
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">var</span> rearged <span class="token operator">=</span> <span class="token function">rearg</span><span class="token punctuation">(</span>
|
|
<span class="token keyword">function</span><span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">,</span> c<span class="token punctuation">) {</span>
|
|
<span class="token keyword">return</span> <span class="token punctuation">[</span>a<span class="token punctuation">,</span> b<span class="token punctuation">,</span> c<span class="token punctuation">];
|
|
},
|
|
[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">]
|
|
);</span>
|
|
<span class="token function">rearged</span><span class="token punctuation">(</span><span class="token string">'b'</span><span class="token punctuation">,</span> <span class="token string">'c'</span><span class="token punctuation">,</span> <span class="token string">'a'</span><span class="token punctuation">);</span> <span class="token comment">// ['a', 'b', 'c']</span>
|
|
</pre><button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><div class="card fluid"><h3 id="spreadover" class="section double-padded">spreadOver</h3><div class="section double-padded"><p>Takes a variadic function and returns a closure that accepts an array of arguments to map to the inputs of the function.</p><p>Use closures and the spread operator (<code>...</code>) to map the array of arguments to the inputs of the function.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">spreadOver</span> <span class="token operator">=</span> fn <span class="token operator">=></span> argsArr <span class="token operator">=></span> <span class="token function">fn</span><span class="token punctuation">(</span><span class="token operator">...</span>argsArr<span class="token punctuation">);</span>
|
|
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> arrayMax <span class="token operator">=</span> <span class="token function">spreadOver</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span>max<span class="token punctuation">);</span>
|
|
<span class="token function">arrayMax</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">]);</span> <span class="token comment">// 3</span>
|
|
</pre><button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><div class="card fluid"><h3 id="unary" class="section double-padded">unary</h3><div class="section double-padded"><p>Creates a function that accepts up to one argument, ignoring any additional arguments.</p><p>Call the provided function, <code>fn</code>, with just the first argument given.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">unary</span> <span class="token operator">=</span> fn <span class="token operator">=></span> val <span class="token operator">=></span> <span class="token function">fn</span><span class="token punctuation">(</span>val<span class="token punctuation">);</span>
|
|
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token punctuation">[</span><span class="token string">'6'</span><span class="token punctuation">,</span> <span class="token string">'8'</span><span class="token punctuation">,</span> <span class="token string">'10'</span><span class="token punctuation">].</span><span class="token function">map</span><span class="token punctuation">(</span><span class="token function">unary</span><span class="token punctuation">(</span>parseInt<span class="token punctuation">));</span> <span class="token comment">// [6, 8, 10]</span>
|
|
</pre><button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><button class="scroll-to-top">↑</button><footer><p style="display:inline-block"><strong>30 seconds of code</strong> is licensed under the <a href="https://github.com/Chalarangelo/30-seconds-of-code/blob/master/LICENSE">CC0-1.0</a> license.<br>Icons made by <a href="https://www.flaticon.com/authors/smashicons">Smashicons</a> from <a href="https://www.flaticon.com/">www.flaticon.com</a> are licensed under the <a href="http://creativecommons.org/licenses/by/3.0/">CC 3.0 BY</a> license.<br>Ribbon made by <a href="https://github.com/tholman/github-corners">Tim Holman</a> is licensed under the <a href="https://opensource.org/licenses/MIT">MIT</a> license.<br>Built with the <a href="https://minicss.org">mini.css framework</a>.</p></footer></main></div></body></html> |