Project Description
linq.js - LINQ for JavaScriptFeatures- implement all .NET 4.0 methods and many extra methods (inspiration from , , Haskell, Ruby, etc...)
- complete lazy evaluation
- full IntelliSense support for VisualStudio
- two versions - linq.js and jquery.linq.js (jQuery plugin)
- support Windows Script Host
- binding for Reactive Extensions for JavaScript(RxJS) and IntelliSense Generator -> see
- NuGet install support(, , )
90 MethodsAggregate, All, Alternate, Any, Average, BufferWithCount, CascadeBreadthFirst, CascadeDepthFirst, Catch, Choice, Concat,Contains, Count, Cycle, DefaultIfEmpty, Distinct, Do, ElementAt, ElementAtOrDefault, Empty, Except, Finally, First, FirstOrDefault, Flatten, ForEach, Force, From, Generate, GetEnumerator, GroupBy, GroupJoin, IndexOf, Insert, Intersect, Join, Last, LastIndexOf,LastOrDefault, Let, Matches, Max, MaxBy, MemoizeAll, Min, MinBy, OfType, OrderBy, OrderByDescending, Pairwise, PartitionBy, Range, RangeDown, RangeTo, Repeat, RepeatWithFinalize, Return, Reverse, Scan, Select, SelectMany, SequenceEqual, Share, Shuffle,Single, SingleOrDefault, Skip, SkipWhile, Sum, Take, TakeExceptLast, TakeFromLast, TakeWhile, ThenBy, ThenByDescending, ToArray,ToDictionary, ToInfinity,ToJSON, ToLookup, ToNegativeInfinity, ToObject, ToString, Trace, Unfold, Union, Where, Write, WriteLine, Zip
- see details -
Starting linq.js ver.3.0.0-beta!(2012/07/19)
@2013/06/20
or NuGet Install-Package linq.js -Pre, linq.js-jQuery -Pre, linq.js-RxJS -Pre, linq.js-QUnit -PreNow TypeScript Generics(0.9) support!Please try it! and give me a feedback!Query objects or json
- sample from http://twitter.com/statuses/public_timeline.json
var jsonArray = [ { "user": { "id": 100, "screen_name": "d_linq" }, "text": "to objects" }, { "user": { "id": 130, "screen_name": "c_bill" }, "text": "g" }, { "user": { "id": 155, "screen_name": "b_mskk" }, "text": "kabushiki kaisha" }, { "user": { "id": 301, "screen_name": "a_xbox" }, "text": "halo reach" }]// ["b_mskk:kabushiki kaisha", "c_bill:g", "d_linq:to objects"]var queryResult = Enumerable.From(jsonArray) .Where(function (x) { return x.user.id < 200 }) .OrderBy(function (x) { return x.user.screen_name }) .Select(function (x) { return x.user.screen_name + ':' + x.text }) .ToArray();// shortcut! string lambda selectorvar queryResult2 = Enumerable.From(jsonArray) .Where("$.user.id < 200") .OrderBy("$.user.screen_name") .Select("$.user.screen_name + ':' + $.text") .ToArray(); High compatibility with C# Linq
// C# LINQ (delegate)Enumerable.Range(1, 10) .Where(delegate(int i) { return i % 3 == 0; }) .Select(delegate(int i) { return i * 10; });// linq.js - anonymous functionEnumerable.Range(1, 10) .Where(function(i) { return i % 3 == 0; }) .Select(function(i) { return i * 10; });// C# LINQ (lambda)Enumerable.Range(1, 10).Where(i => i % 3 == 0).Select(i => i * 10);// linq.js - lambda expressionEnumerable.Range(1, 10).Where("i => i % 3 == 0").Select("i => i * 10");// $ is default iterator variable like Scala's "_" or Groovy's "it"Enumerable.Range(1, 10).Where("$ % 3 == 0").Select("$ * 10"); // "" is shorthand of "x => x" (identity function)Enumerable.Range(4, 7).Join(Enumerable.Range(8, 5), "", "", "outer,inner=>outer*inner");// Enumerable.From is wrap from primitive array, string(to charArray), object(to KeyValuePair[]) etc..var array = [100, 200, 30, 40, 500, 40, 200];var ex1 = Enumerable.From(array).Distinct().ToArray(); // [100, 200, 30, 40, 500]var ex2 = Enumerable.From("foobar").ToArray(); // ["f", "o", "o", "b", "a", "r"];var ex3 = Enumerable.From({foo:10, bar:20}).ToArray(); // [{Key:"foo",Value:10}, {Key:"bar",Value:20}]// C# - AnonymousTypearray.Select((val, i) => new { Value = val, Index = i });// linq.js - object literalEnumerable.From(array).Select("val,i=>{Value:val, Index:i}") jQuery plugin version
// $.Enumerable$.Enumerable.Range(1, 10).Where("$%2==0").ForEach("alert($)");// TojQuery - Enumerable to jQuery$.Enumerable.Range(1, 10) .Select(function (i) { return $(" IntelliSense vsdoc
video - how to debug linq.js
with Windows Script Host
// get folder name and file name...var dir = WScript.CreateObject("Scripting.FileSystemObject").GetFolder("C:\\"); // normallyvar itemNames = [];for (var e = new Enumerator(dir.SubFolders); !e.atEnd(); e.moveNext()){ itemNames.push(e.item().Name);}for (var e = new Enumerator(dir.Files); !e.atEnd(); e.moveNext()){ itemNames.push(e.item().Name);}// linq.jsvar itemNames2 = Enumerable.From(dir.SubFolders).Concat(dir.Files).Select("$.Name").ToArray(); 原文链接：https://archive.codeplex.com/?p=linqjs