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<!doctype html>
<html class="default no-js">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>eslinq</title>
<meta name="description" content="">
<meta name="viewport" content="width=device-width, initial-scale=1">
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</head>
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<input id="tsd-search-field" type="text" />
</div>
<ul class="results">
<li class="state loading">Preparing search index...</li>
<li class="state failure">The search index is not available</li>
</ul>
<a href="index.html" class="title">eslinq</a>
</div>
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<a href="#" class="tsd-widget options no-caption" data-toggle="options">Options</a>
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<span class="tsd-select-label">All</span>
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<h1> eslinq</h1>
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<div class="container container-main">
<div class="row">
<div class="col-8 col-content">
<div class="tsd-panel tsd-typography">
<h1 id="-eslinq">👴 eslinq</h1>
<p>.NET LINQ for Javascript, written by TypeScript.</p>
<ul>
<li>Provide <code>IQueryable<T></code>, it's reusable, also variable and use <code>iterator list</code> for holding query and execute.</li>
<li>Contains almost the original .NET and some extends methods.</li>
</ul>
<h3 id="example">Example</h3>
<pre><code class="lang-ts"><span class="hljs-keyword">const</span> queryable = <span class="hljs-keyword">new</span> Queryable<{ name, nationId, overall, skills }>();
<span class="hljs-keyword">let</span> promiseApi = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
<span class="hljs-comment">// skills: attack, stamia, speed, shoot</span>
setTimeout(<span class="hljs-function"><span class="hljs-params">()</span> =></span> {
<span class="hljs-built_in">console</span>.log(<span class="hljs-string">'...get data'</span>);
resolve([
{ name: <span class="hljs-string">'Ronaldo'</span>, overall: <span class="hljs-number">96</span>, nationId: <span class="hljs-number">1</span>, skills: [<span class="hljs-number">96</span>, <span class="hljs-number">85</span>, <span class="hljs-number">87</span>, <span class="hljs-number">91</span>] },
{ name: <span class="hljs-string">'Messi'</span>, overall: <span class="hljs-number">98</span>, nationId: <span class="hljs-number">2</span>, skills: [<span class="hljs-number">97</span>, <span class="hljs-number">85</span>, <span class="hljs-number">91</span>, <span class="hljs-number">93</span>] },
{ name: <span class="hljs-string">'Mbappe'</span>, overall: <span class="hljs-number">86</span>, nationId: <span class="hljs-number">3</span>, skills: [<span class="hljs-number">89</span>, <span class="hljs-number">81</span>, <span class="hljs-number">95</span>, <span class="hljs-number">83</span>] },
{ name: <span class="hljs-string">'Salah'</span>, overall: <span class="hljs-number">89</span>, nationId: <span class="hljs-number">4</span>, skills: [<span class="hljs-number">88</span>, <span class="hljs-number">82</span>, <span class="hljs-number">97</span>, <span class="hljs-number">86</span>] }
]);
}, <span class="hljs-number">1000</span>);
})
<span class="hljs-keyword">let</span> nations = [
{ id: <span class="hljs-number">1</span>, name: <span class="hljs-string">'Portugal'</span>, areaId: <span class="hljs-number">1</span> },
{ id: <span class="hljs-number">2</span>, name: <span class="hljs-string">'Argentina'</span>, areaId: <span class="hljs-number">2</span> },
{ id: <span class="hljs-number">3</span>, name: <span class="hljs-string">'France'</span>, areaId: <span class="hljs-number">1</span> },
{ id: <span class="hljs-number">4</span>, name: <span class="hljs-string">'Egypt'</span>, areaId: <span class="hljs-number">3</span> }
]
<span class="hljs-keyword">let</span> continents = [
{ id: <span class="hljs-number">1</span>, areaName: <span class="hljs-string">'Euro'</span> },
{ id: <span class="hljs-number">2</span>, areaName: <span class="hljs-string">'South America'</span> },
]
<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">main</span>(<span class="hljs-params"></span>) </span>{
<span class="hljs-comment">// Just query</span>
<span class="hljs-built_in">console</span>.time(<span class="hljs-string">'querytime'</span>);
<span class="hljs-keyword">let</span> query = queryable
.from(promiseApi)
.join(nations, <span class="hljs-function">(<span class="hljs-params">pl, na</span>) =></span> pl.nationId === na.id)
.leftJoin(continents, <span class="hljs-function">(<span class="hljs-params">plNation, co</span>) =></span> plNation.y.areaId === co.id)
.select(<span class="hljs-function"><span class="hljs-params">o</span> =></span> {
<span class="hljs-keyword">return</span> {
playerName: o.x.name,
overall: o.x.overall,
nation: o.y.name,
area: o.areaName
}
})
.groupBy(<span class="hljs-function"><span class="hljs-params">x</span> =></span> x.area)
.orderByDescending(<span class="hljs-function"><span class="hljs-params">x</span> =></span> x.key);
<span class="hljs-comment">// call toList() to execute data</span>
<span class="hljs-keyword">const</span> data = query.toList().then(<span class="hljs-function"><span class="hljs-params">data</span> =></span> {
<span class="hljs-built_in">console</span>.log(data);
});
}
main();
</code></pre>
<h3 id="process">Process</h3>
<ul>
<li>[x] from</li>
<li>[x] where</li>
<li>[x] select</li>
<li>[x] selectMany</li>
<li>[x] join</li>
<li>[x] leftJoin</li>
<li>[ ] groupJoin</li>
<li>[x] orderBy</li>
<li>[x] orderByDescending</li>
<li>[x] take</li>
<li>[x] takeWhile</li>
<li>[x] skip</li>
<li>[x] skipWhile</li>
<li>[x] groupBy</li>
<li>[ ] distinct</li>
<li>[ ] concat</li>
<li>[ ] zip</li>
<li>[ ] union</li>
<li>[ ] intersect</li>
<li>[ ] except</li>
<li>[x] first : <code>Promise<T></code></li>
<li>[x] firstOrDefault : <code>Promise<T | null></code></li>
<li>[x] last : <code>Promise<T></code></li>
<li>[x] lastOrDefault : <code>Promise<T | null></code></li>
<li>[x] single</li>
<li>[x] singleOrDefault</li>
<li>[ ] elementAt</li>
<li>[ ] elementAtOrDefault</li>
<li>[ ] orderByDescending</li>
<li>[ ] defaultIfEmpty</li>
<li>[ ] contains</li>
<li>[ ] reserve</li>
<li>[ ] sequenceEqual</li>
<li>[x] any : <code>Promise<boolean></code></li>
<li>[ ] all</li>
<li>[x] count : <code>Promise<number></code></li>
<li>[ ] longCount</li>
<li>[x] min : <code>Promise<number></code></li>
<li>[x] max : <code>Promise<number></code></li>
<li>[x] sum : <code>Promise<number></code></li>
<li>[x] average</li>
<li>[ ] aggregate</li>
<li>[x] toList : <code>Promise<T[]></code></li>
</ul>
<h3 id="license">License</h3>
<p><a href="http:https://opensource.org/licenses/MIT">MIT License</a></p>
</div>
</div>
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