$linq - A Javascript LINQ library

Project Description
$linq is a Javascript version of .NET's Linq to Objects, with some query operations inspired by MoreLinq (an extension to Linq to Objects).

What is $linq?

$linq is an implementation of .NET Linq to Objects for Javascript. It implements most of the corresponding .NET Linq to Objects methods. It also implements some methods inspired by MoreLinq (http://code.google.com/p/morelinq). $linq will work with arrays and jQuery collections. $linq can also generate values from a numerical range, as an item repeated a given number of times, and from RegExp match results.

Some of the Linq to Objects methods implemented

• select
• selectMany
• where
• orderBy
• thenBy
• distinct
• groupBy
• groupJoin
• join
• except
• union
• intersect
• take/takeWhile/takeUntil
• skip/skipWhile/skipUntil

Examples

A simple example of breaking up a sequence of numbers into even and odd arrays:

var list = $linq([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);

var evens = list.where(function (x) { return x % 2 == 0; }).toArray();
var odds = list.where("x => x % 2 == 1").toArray();

Ordering a list of people:

var people = [{first: "Jason", last: "Bourne"},
    {first: "Gandalf", last: "The Grey"},
    {first: "John", last: "Smith"},
    {first: "Albert", last: "Smith"}];
    
var results = $linq(people)
    .orderBy(function (x) { return x.last; })
    .thenBy("x => x.first")
    .toArray();

Using an inner join:

var users = [{username: "asmith", domain: "north_america"},
    {username: "tmcfarland", domain: "europe"},
    {username: "cdeckard", domain: "nort_america"}];
    
var groups = [{user: "ASMITH", groupName: "base_users"},
    {user: "TMCFARLAND", groupName: "admins"},
    {user: "CDECKARD", groupName: "base_users"},
    {user: "CDECKARD", groupName: "testers"}];
    
var results = $linq(users).join(groups,
    function (x) { return x.username; },    // key for 'users'
    "x => x.user",                          // key for 'groups'
    function (outer, inner)                 // function to generate results
    { 
        return "user: " + outer.username + 
            ", domain: " + outer.domain +
            ", group: " + inner.groupName;
    },
    "(x, y) => x.toLowerCase() == y.toLowerCase()");    // compare keys case-insensitively