ts-linq

This is a fork of https://github.com/ENikS/LINQ, it has been refactored such that the type definitions are automatically generated from the source typescript.

Typescript LINQ

This library is a complete implementation of LINQ methods available on Enumerable class.

Implemented methods

Aggregate
All
Any
Average
Concat
Contains
Count
DefaultIfEmpty
Distinct
ElementAt
ElementAtOrDefault
Except
First
FirstOrDefault
GroupBy
GroupJoin
Intersect
Join
Last
LastOrDefault
Max
Min
OrderBy
OrderByDescending
ThenBy
ThenByDescending
Range
Repeat
Reverse
Select
SelectMany
SequenceEqual
Single
SingleOrDefault
Skip
SkipWhile
Sum
Take
TakeWhile
ToArray
ToMap
Union
Where
Zip

Installation

npm install ts-linq

Using

import {asEnumerable, Range} from "ts-linq";


var count =  asEnumerable( [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] ).Where(a => a % 2 == 1).Count()

var iterable = asEnumerable(people)
               .GroupJoin(pets,
                          person => person,
                          pet => pet.Owner,
                          (person, petCollection) => {
                              return {
                                  Owner: person.Name,
                                  Pets: asEnumerable(petCollection)
                                       .Select(pet=> pet.Name)
                                       .ToArray()
                              };
                          });

For more information visit MSDN: https://msdn.microsoft.com/en-us/library/system.linq.enumerable.aspx

Implementation details

This library uses Iterable interface T[System.iterator] natively implemented in JavaScript by most of collection types (Array, Map, Set, String). As result iterations are done much faster compared to IEnumerable implementation. The code is also backwards compatible with IEnumerable implementation.

All relevant methods are implemented with deferred execution so no unnecessary iterations are performed.