The library is a continuous effort to implement LINQ using latest features of TypeScript and JavaScript languages (For ES5 compatible library look at linq-es5 branch). The library is implemented in TypeScript and transpiled into JavaScript. It is distributed as a native module. It utilizes latest ECMAScript 2015 language specification: Iterables ( System.iterator ), generators (function), for of loops. All relevant methods are implemented with deferred execution so no unnecessary iterations are performed. The code is backwards compatible with linq-es5 and C# implementations.
Using in Node
Install module with this command: ``` npm install linq-es2015 --save ``` Once installed it could be loaded and used like this: ```javascript import as Enumerable from "linq-es2015"; var count = Enumerable.asEnumerable( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ).Where(a => a % 2 == 1).Count().GroupJoin(pets,person => person, pet => pet.Owner,(person, petCollection) => {return {Owner: person.Name,Pets: asEnumerable(petCollection).Select(pet=> pet.Name).ToArray()};});Using in browser
Browserified "standalone" UMD module is located in ``/dist`` directory and could be accessed through NPM CDN service. Both linq.js and linq.min.js are available.
Module is loaded with ``<script>`` element:
```javascript
```
Loading this script creates ``Enumerable`` global variable. You can use it to perform LINQ queries:
```javascript
var count = Enumerable.asEnumerable( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 )
.Where(a => a % 2 == 1).Count()Using in Angular 2
The same package could be used on a server as well as on the client. You have to install module as usual: ``` npm install linq-es2015 --save ``` Open ``app.components.html`` file and add element to hold calculated value:
```javascript
{{title}}
Count - {{count}}
```
and finally import ``linq-es2015`` in app.component.ts and do some calculations:
```javascript
import { Component } from '@angular/core';
import { asEnumerable } from 'linq-es2015';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: './app.component.css'
})
export class AppComponent {
title = 'app works!';
count: number;
constructor(){this.count = asEnumerable([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]).Where(a => a % 2 == 1).Count(); }