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LINQ Pad

Enumerable.Range(0, 20)
.Where("$ % 3 == 0")
.Select("value, index => {index:index, value:value * 10}")
.WriteLine("$.index + ':' + $.value")

0:0
1:30
2:60
3:90
4:120
5:150
6:180

Generating Methods

method name return type arguments example (click code)
Choice Enumerable params T obj 
Enumerable.Choice("a","b","c","d").Take(10)
Enumerable.Choice(["a","b","c","d"]).Take(10)
Cycle Enumerable params T obj 
Enumerable.Cycle(1,"foo",true).Take(10)
Enumerable.Cycle([1,"foo",true]).Take(10)
Empty Enumerable () 
Enumerable.Empty()
From Enumerable Array obj 
var arr = [1,124,"aaa",function(){},false];

Enumerable.From(arr)
Object obj 
var obj = {a:3,b:"3",z:function(){},d:true};

Enumerable.From(obj).Select("$.Key + ':' + $.Value")
NodeList obj 
var node = document.getElementsByTagName("h2");

Enumerable.From(node).Select("$.innerHTML")
Number obj 
Enumerable.From(5)
String obj 
Enumerable.From("foobar")
IEnumerable(WSH) obj 
// using with Windows Script Host

// var fso = WScript.CreateObject("Scripting.FileSystemObject");

// var files = fso.GetFolder("C:\\").Files;

// Enumerable.From(files).Select("$.Name").ForEach("WScript.Echo($)");
Return Enumerable T element 
Enumerable.Return("foobar")
Matches Enumerable string input, RegExp pattern 
Enumerable.Matches("xbcyBCzbc", /(.)bc/i)

.Select("'index='+$.index+' all='+$[0]+' capture='+$[1]")
string input, string pattern 
Enumerable.Matches("xbcyBCzbc", "(.)bc")

.Select("'index='+$.index+' all='+$[0]+' capture='+$[1]")
string input, string pattern, string flags 
Enumerable.Matches("xbcyBCzbc", "(.)bc", "i")

.Select("'index='+$.index+' all='+$[0]+' capture='+$[1]")
Range Enumerable int start, int count 
Enumerable.Range(10,5)
int start, int count, int step 
Enumerable.Range(10,5,3)
RangeDown Enumerable int start, int count 
Enumerable.RangeDown(10,5)
int start, int count, int step 
Enumerable.RangeDown(10,5,3)
RangeTo Enumerable int start, int to 
Enumerable.RangeTo(10,18)
Enumerable.RangeTo(3,-5)
int start, int to, int step 
Enumerable.RangeTo(1,9,3)
Enumerable.RangeTo(1,-9,3)
Repeat Enumerable T obj 
Enumerable.Repeat(3).Take(5)
T obj, int count 
Enumerable.Repeat("foo",10)
RepeatWithFinalize Enumerable T initializer(), void finalizer(T) 
// example for WScript(Text EnumerateLines and Finally Close)

// var fso = WScript.CreateObject("Scripting.FileSystemObject");

// Enumerable.RepeatWithFinalize(

//         function () { return fso.OpenTextFile("C:\\file.txt") },

//         function (ts) { ts.Close() })

//     .TakeWhile(function (ts) { return !ts.AtEndOfStream })

//     .Select(function (ts) { return ts.ReadLine() });
Generate Enumerable T func() 
Enumerable.Generate("Math.random()").Take(5)
T func(), int count 
Enumerable.Generate("Math.random()", 5)
ToInfinity Enumerable () 
Enumerable.ToInfinity().Take(5)
int start 
Enumerable.ToInfinity(1000).Take(5)
int start, int step 
Enumerable.ToInfinity(1000,5).Take(5)
ToNegativeInfinity Enumerable () 
Enumerable.ToNegativeInfinity().Take(5)
int start 
Enumerable.ToNegativeInfinity(1000).Take(5)
int start, int step 
Enumerable.ToNegativeInfinity(1000,5).Take(5)
Unfold Enumerable T seed, T func(T) 
Enumerable.Unfold(5, "$+3").Take(10)

Projection and Filtering Methods

method name return type arguments example (click code)
CascadeBreadthFirst Enumerable T[] func(T) 
Enumerable.Return(1).CascadeBreadthFirst("$+$").Take(5)
T[] func(T), T resultSelector(T) 
Enumerable.Return(1).CascadeBreadthFirst("$+$","$*$").Take(5)
T[] func(T), T resultSelector(T, int) 
Enumerable.Return(document.body)

.CascadeBreadthFirst("$.childNodes", "v,n=>{value:v,nestLevel:n}")

.Where("$.nestLevel<3 && $.value.nodeType == 1")

.Select("$.nestLevel + ':' + $.value.tagName")
CascadeDepthFirst Enumerable T[] func(T) 
Enumerable.Return(1).CascadeDepthFirst("$+$").Take(5)
T[] func(T), T resultSelector(T) 
Enumerable.Return(1).CascadeDepthFirst("$+$","$*$").Take(5)
T[] func(T), T resultSelector(T, int) 
Enumerable.Return(document.body)

.CascadeDepthFirst("$.childNodes", "v,n=>{value:v,nestLevel:n}")

.Where("$.nestLevel<3 && $.value.nodeType == 1")

.Select("$.nestLevel + ':' + $.value.tagName")
Flatten Enumerable () 
var array = [1,[234,2,[62,3]],[234,5],3];

Enumerable.From(array).Flatten()
Pairwise Enumerable T selector(T, T) 
Enumerable.Range(1,10)

.Pairwise("prev,next=>prev + ':' + next")
Scan Enumerable T func(T, T) 
Enumerable.Range(1,10).Scan("a,b=>a+b")
T seed, T func(T, T) 
Enumerable.Range(1,10).Scan(100,"a,b=>a+b")
T seed, T func(T, T), T resultSelector(T) 
Enumerable.Range(1,10).Scan(100,"a,b=>a+b","$*10")
Select Enumerable T selector(T) 
Enumerable.Range(1,10).Select("$*10")
T selector(T, int) 
Enumerable.RangeDown(10,10).Select("value,index=>index + ':' + value")
SelectMany Enumerable T[] collectionSelector(T) 
Enumerable.Range(1,3).SelectMany("Enumerable.Repeat($,3)")
T[] collectionSelector(T, int) 
Enumerable.Range(5,5)

.SelectMany("value,index=>Enumerable.Repeat('str'+value,index+1)")
T[] collectionSelector(T), resultSelector(T, T) 
Enumerable.Range(1,3)

.SelectMany("Enumerable.Repeat($,3)","first,middle=>first + ':' + middle*10")
T[] collectionSelector(T, int), resultSelector(T, T) 
Enumerable.Range(5,5)

.SelectMany("v,i=>Enumerable.Repeat('str'+v,i+1)","f,m=>f + ':' + m")
Where Enumerable bool predicate(T) 
Enumerable.Range(1,10).Where("$%2==0")
bool predicate(T, int) 
Enumerable.Range(1,10).Where("value,index=>value*index>10")
OfType Enumerable Class type 
Enumerable.From([1,"a",2,"b","c",3]).OfType(Number)
Enumerable.From([1,"a",2,"b","c",3]).OfType(String)
function ClassA(v){this.v = v}

Enumerable.From([new ClassA("a"),1,2,new ClassA("b")])

    .OfType(ClassA).Select("$.v")
Zip Enumerable T[] second,T selector(T, T) 
Enumerable.RangeDown(10,10)

.Zip(Enumerable.Range(1,10),"outer,inner=>outer + ':' + inner")
T[] second,T selector(T, T, int) 
Enumerable.RangeDown(10,10)

.Zip(Enumerable.Range(1,10),"outer,inner,index=>index + ':' + outer*inner")

Join Methods

method name return type arguments example (click code)
Join Enumerable T[] inner, T outerKeySelector(T), T innerKeySelector(T), T resultSelector(T, T) 
var array1 = [13,413,5,135,61,631,13,61,3];

var array2 = [13,134,53,6,3,7,13,7,7,135,61,3,13];

Enumerable.From(array1)

.Join(array2,"","","outer,inner=>outer + ':' + inner")
T[] inner, T outerKeySelector(T), T innerKeySelector(T), T resultSelector(T, T), T compareSelector(T) 
var array1 = [10,405,50,135];

var array2 = [1,4,7,8];

Enumerable.From(array1)

.Join(array2,"","","outer,inner=>outer + ':' + inner","$%2==0")
GroupJoin Enumerable T[] inner, T outerKeySelector(T), T innerKeySelector(T), T resultSelector(T, Enumerable) 
var array1 = [13,413,5,135,61,631,13,61,3];

var array2 = [13,134,53,6,3,7,13,7,7,135,61,3,13];

Enumerable.From(array1)

.GroupJoin(array2,"","","outer,lookup=>outer + ':' + lookup.ToString('-')")
T[] inner, T outerKeySelector(T), T innerKeySelector(T), T resultSelector(T, Enumerable), T compareSelector(T) 
var array1 = [10,405,50,135];

var array2 = [1,4,7,8];

Enumerable.From(array1)

.GroupJoin(array2,"","","outer,lookup=>outer + ':' + lookup.ToString('-')","$%2==0")

Set Methods

method name return type arguments example (click code)
All Boolean bool predicate(T) 
Enumerable.Range(1,10).All("$<5")
Enumerable.Range(1,10).All("$<15")
Any Boolean () 
Enumerable.Range(1,0).Any()
Enumerable.Range(1,10).Any()
bool predicate(T) 
Enumerable.Range(1,10).Any("$==5")
Enumerable.Range(1,10).Any("$==15")
Concat Enumerable T[] second 
Enumerable.Range(1,5).Concat(Enumerable.Repeat("foo",5))
Insert Enumerable int index, T[] second 
Enumerable.Range(1,5).Insert(3,Enumerable.Repeat("foo",5))
Alternate Enumerable T value 
Enumerable.Range(1,5).Alternate(-1)
Contains Boolean T value 
Enumerable.Range(1,5).Contains(3)
Enumerable.Range(1,5).Contains(10)
T value, T compareSelector(T) 
Enumerable.Range(1,5).Select("{test:$}").Contains(3)
Enumerable.Range(1,5).Select("{test:$}").Contains(3,"$.test")
DefaultIfEmpty Enumerable T defaultValue 
Enumerable.Range(1,5).DefaultIfEmpty("default")
Enumerable.Range(1,0).DefaultIfEmpty("default")
Distinct Enumerable () 
var array = [1,412,5,3,5,412,7];

Enumerable.From(array).Distinct()
T compareSelector(T) 
var seq = Enumerable.Range(1,10).Select("{test:$%3}");

seq.Distinct("$.test").Select("$.test")
Except Enumerable T[] second 
var array1 = [1,412,5,3,5,412,7];

var array2 = [20,12,5,5,7,310];

Enumerable.From(array1).Except(array2)
T[] second, T compareSelector(T) 
var seq1 = Enumerable.Range(1,10).Select("{test:$%5}");

var seq2 = Enumerable.Range(1,10).Select("{test:$%2}");

seq1.Except(seq2,"$.test").Select("$.test")
Intersect Enumerable T[] second 
var array1 = [1,412,5,3,5,412,7];

var array2 = [20,12,5,5,7,310];

Enumerable.From(array1).Intersect(array2)
T[] second, T compareSelector(T) 
var seq1 = Enumerable.Range(1,10).Select("{test:$%5}");

var seq2 = Enumerable.Range(1,10).Select("{test:$%2}");

seq1.Intersect(seq2,"$.test").Select("$.test")
SequenceEqual Boolean T[] second 
Enumerable.Range(1,5).SequenceEqual(Enumerable.Range(1,5))
Enumerable.Range(1,5).SequenceEqual(Enumerable.Range(1,6))
T[] second, T compareSelector(T) 
Enumerable.Range(1,10).Select("{test:$%5}")

.SequenceEqual(Enumerable.Range(1,10).Select("{test:$%5}"),"$.test")
Union Enumerable T[] second 
var array1 = [1,412,5,3,5,412,7];

var array2 = [20,12,5,5,7,310];

Enumerable.From(array1).Union(array2)
T[] second, T compareSelector(T) 
var seq1 = Enumerable.Range(1,5).Select("{test:$}");

var seq2 = Enumerable.Range(3,7).Select("{test:$}");

seq1.Union(seq2,"$.test").Select("$.test")

Ordering Methods

method name return type arguments example (click code)
OrderBy OrderedEnumerable () 
var array = [1,51,61,75,8,35,43];

Enumerable.From(array).OrderBy()
T keySelector(T) 
var array = [{a:"a"},{a:"z"},{a:"k"},{a:"l"},{a:"m"},{a:"c"}];

Enumerable.From(array).OrderBy("$.a").Select("$.a")
OrderByDescending OrderedEnumerable () 
var array = [1,51,61,75,8,35,43];

Enumerable.From(array).OrderByDescending()
T keySelector(T) 
var array = [{a:"a"},{a:"z"},{a:"k"},{a:"l"},{a:"m"},{a:"c"}];

Enumerable.From(array).OrderByDescending("$.a").Select("$.a")
ThenBy OrderedEnumerable T keySelector(T) 
var list = [

           { a: 2, b: 4, c: 1 },

           { a: 2, b: 3, c: 7 },

           { a: 2, b: 3, c: 3 },

           { a: 4, b: 7, c: 5 },

           { a: 7, b: 3, c: 2 },

           { a: 4, b: 1, c: 5 }];

Enumerable.From(list).OrderBy("$.a").ThenBy("$.c").ThenBy("$.b")

.Select("$.a + ':' + $.b + ':' + $.c")
ThenByDescending OrderedEnumerable T keySelector(T) 
var list = [

           { a: 2, b: 4, c: 1 },

           { a: 2, b: 3, c: 7 },

           { a: 2, b: 3, c: 3 },

           { a: 4, b: 7, c: 5 },

           { a: 7, b: 3, c: 2 },

           { a: 4, b: 1, c: 5 }];

Enumerable.From(list).OrderBy("$.a").ThenByDescending("$.c").ThenByDescending("$.b")

.Select("$.a + ':' + $.b + ':' + $.c")
Reverse Enumerable () 
Enumerable.Range(1,10).Reverse()
Shuffle Enumerable () 
Enumerable.Range(1,10).Shuffle()

Grouping Methods

method name return type arguments example (click code)
GroupBy Enumerable<Grouping> T keySelector(T) 
Enumerable.Range(1,5).GroupBy("$%2==0")

.Select("$.Key() + ':' + $.ToString('-')")
T keySelector(T), T elementSelector(T) 
Enumerable.Range(1,5).GroupBy("$%2==0","$*10")

.Select("$.Key() + ':' + $.ToString('-')")
Enumerable T keySelector(T), T elementSelector(T), T resultSelector(T, Enumerable) 
Enumerable.Range(1,5)

.GroupBy("$%2==0","","key,e=>key+':'+e.ToString('-')")
TK keySelector(T), TE elementSelector(T), TR resultSelector(T, Enumerable),TC compareSelector(TK) 
Enumerable.From([{d:new Date(2000,1,1),i:0},{d:new Date(2000,1,1),i:1}])

.GroupBy("$.d","","key,e=>key+':'+e.Select('$.i').ToArray()","$.toString()")
PartitionBy Enumerable<Grouping> T keySelector(T) 
Enumerable.From([1,2,2,3,3,2,1,1]).PartitionBy("i=>i")

.Select("$.Key() + ':' + $.ToString('-')")
T keySelector(T), T elementSelector(T) 
Enumerable.From([1,2,2,3,3,2,1,1]).PartitionBy("i=>i","i=>i*100")

.Select("$.Key() + ':' + $.ToString('-')")
Enumerable T keySelector(T), T elementSelector(T), T resultSelector(T, Enumerable) 
Enumerable.From([1,2,2,3,3,2,1,1])

.PartitionBy("i=>i","i=>i","key,e=>key+':'+e.ToString('-')")
TK keySelector(T), TE elementSelector(T), TR resultSelector(T, Enumerable), TC compareSelector(TK) 
Enumerable.From([{d:new Date(2000,1,1),i:0},{d:new Date(2000,1,1),i:1}])

.PartitionBy("$.d","","key,e=>key+':'+e.Select('$.i').ToArray()","$.toString()")
BufferWithCount Enumerable<Array> int count 
Enumerable.Range(1,10).BufferWithCount(4)

Aggregate Methods

method name return type arguments example (click code)
Aggregate T T func(T, T) 
Enumerable.Range(1,5).Aggregate("a,b=>a*b")
T seed, T func(T, T) 
Enumerable.Range(1,10).Aggregate(100,"a,b=>a+b")
T seed, T func(T, T), T resultSelector(T) 
Enumerable.Range(1,10).Aggregate(100,"a,b=>a+b","$*10")
Average Number () 
Enumerable.Range(1,10).Average()
Number selector(T) 
Enumerable.From([{a:"foo",b:5},{a:"bar",b:20},{a:"foobar",b:10}])

.Average("$.b")
Count Number () 
Enumerable.Range(1,10).Count()
bool predicate(T) 
Enumerable.Range(1,10).Count("$>7")
Max Number () 
Enumerable.Range(1,10).Max()
Number selector(T) 
Enumerable.From([{a:"foo",b:5},{a:"bar",b:20},{a:"foobar",b:10}])

.Max("$.b")
Min Number () 
Enumerable.Range(1,10).Min()
Number selector(T) 
Enumerable.From([{a:"foo",b:5},{a:"bar",b:20},{a:"foobar",b:10}])

.Min("$.b")
MaxBy T Number selector(T) 
Enumerable.From([{a:"foo",b:5},{a:"bar",b:20},{a:"foobar",b:10}])

.MaxBy("$.b").a
MinBy T Number selector(T) 
Enumerable.From([{a:"foo",b:5},{a:"bar",b:20},{a:"foobar",b:10}])

.MinBy("$.b").a
Sum Number () 
Enumerable.Range(1,10).Sum()
Number selector(T) 
Enumerable.From([{a:"foo",b:5},{a:"bar",b:20},{a:"foobar",b:10}])

.Sum("$.b")

Paging Methods

method name return type arguments example (click code)
ElementAt T int index 
Enumerable.Range(1,10).ElementAt(3)
ElementAtOrDefault T int index, T defaultValue 
Enumerable.Range(1,10).ElementAtOrDefault(15,-1)
First T () 
Enumerable.Range(1,10).First()
bool predicate(T) 
Enumerable.Range(1,10).First("$>4")
FirstOrDefault T T defaultValue 
Enumerable.Empty().FirstOrDefault(-1)
T defaultValue, bool predicate(T) 
Enumerable.Range(1,10).FirstOrDefault(-1,"$>15")
Last T () 
Enumerable.Range(1,10).Last()
bool predicate(T) 
Enumerable.Range(1,10).Last("$<4")
LastOrDefault T T defaultValue 
Enumerable.Empty().LastOrDefault(-1)
T defaultValue, bool predicate(T) 
Enumerable.Range(1,10).LastOrDefault(-1,"$>15")
Single T () 
Enumerable.From("a").Single()
bool predicate(T) 
Enumerable.Range(1,10).Single("$==4")
SingleOrDefault T T defaultValue 
Enumerable.Empty().SingleOrDefault(-1)
T defaultValue, bool predicate(T) 
Enumerable.Range(1,10).SingleOrDefault(-1,"$==15")
Skip Enumerable int count 
Enumerable.Range(1,10).Skip(5)
SkipWhile Enumerable bool predicate(T) 
Enumerable.Range(1,10).SkipWhile("$<=5")
bool predicate(T, int index) 
Enumerable.Range(1,10).SkipWhile("value,index=>value+index<=5")
Take Enumerable int count 
Enumerable.Range(1,10).Take(5)
TakeWhile Enumerable bool predicate(T) 
Enumerable.Range(1,10).TakeWhile("$<=5")
bool predicate(T, int index) 
Enumerable.Range(1,10).TakeWhile("value,index=>value+index<=5")
TakeExceptLast Enumerable () 
Enumerable.Range(1,10).TakeExceptLast()
Number count 
Enumerable.Range(1,10).TakeExceptLast(3)
TakeFromLast Enumerable Number count 
Enumerable.Range(1,10).TakeFromLast(3)
IndexOf int T item 
Enumerable.Range(1,10).IndexOf(3)
Enumerable.Range(1,10).IndexOf(15)
LastIndexOf int T item 
Enumerable.From([1,2,3,2,5]).LastIndexOf(2)
Enumerable.From([1,2,3,2,5]).LastIndexOf(20)

Convert Methods

method name return type arguments example (click code)
ToArray Array () 
Enumerable.Range(1,10).ToArray()
ToLookup Lookup TKey keySelector(T) 
var lookup = Enumerable.From(["temp.xls", "temp.pdf", "temp.jpg", "temp2.pdf"])

.ToLookup("$.match(/\\.(.+$)/)[1]");

lookup.ToEnumerable().Select("$.Key() + ' : ' + $.ToArray()")
TKey keySelector(T), TElement elementSelector(T) 
var lookup = Enumerable.From(["temp.xls", "temp.pdf", "temp.jpg", "temp2.pdf"])

.ToLookup("$.match(/\\.(.+$)/)[1]","$.match(/(.+)\\.[^.]+$/)[1]");

lookup.ToEnumerable().Select("$.Key() + ' : ' + $.ToArray()")
TKey keySelector(T), TElement elementSelector(T), TCompare compareSelector(TKey) 
var lookup = Enumerable.From(["temp.xls", "temp.pdf", "temp.jpg", "temp2.pdf"])

.ToLookup("","","$.match(/\\.(.+$)/)[1]");

lookup.ToEnumerable().Select("$.Key() + ' : ' + $.ToArray()")
ToObject Object String keySelector(T), T elementSelector(T) 
var obj = Enumerable.Range(1,10).Select("value,index=>{id:'id_' + index,value:value}")

.ToObject("$.id","$.value");

Enumerable.From(obj).Select("$.Key + ':' + $.Value")
ToDictionary Dictionary TKey keySelector(T), TElement elementSelector(T) 
var dict = Enumerable.Range(1,10).Select("value,index=>{id:'id_' + index,value:value}")

.ToDictionary("$.id","$.value");

dict.ToEnumerable().Select("$.Key + ':' + $.Value")
TKey keySelector(T), TElement elementSelector(T), TCompare compareSelector(TKey) 
var dict = Enumerable.Range(1,10).Select("value,index=>{id:'id_' + index,value:value}")

.ToDictionary("$","$.value","$;id");

dict.ToEnumerable().Select("$.Key.id + ':' + $.Value")
ToJSON String () 
// ToJSON only work Native JSON support browser or include json2.js

Enumerable.From([{Foo:1, Bar:'z'},{Foo:5, Bar:null}]).ToJSON()
TResult replacer(TKey, TValue) 
Enumerable.From(["a","b","c"])

.ToJSON(function(k,v){return (typeof v === 'object') ? v : v.toString().toUpperCase()})
TResult replacer(TKey, TValue), Number space 
Enumerable.Range(1, 5).ToJSON(null, 4)
ToString String () 
Enumerable.Range(0,10).ToString()
String separator 
Enumerable.Range(0,10).ToString("-")
String separator, T selector(T) 
Enumerable.From([{k:"foo"},{k:"bar"}]).ToString("-","$.k")

Action Methods

method name return type arguments example (click code)
Do Enumerable void action(T) 
Enumerable.Range(1,10).Do(function(i){

    document.write('do:'+ i +'|');})

 .Where("$%2==0")
void action(T, index) 
Enumerable.Range(1,10).Do(function(value,index){

    document.write("do:" + index + '-' + value + "<br/>");})

.OrderBy("").Take(2)
ForEach void void action(T) 
Enumerable.Range(1,10).ForEach(function(i){

    document.write(i);})
void action(T, index) 
Enumerable.Range(1,10).ForEach(function(value,index){

    document.write(index + ':' + value + "<br/>");})
bool func(T) 
Enumerable.Range(1, 10).ForEach(function(i)

{

    if (i % 2 == 0) return; // continue

    if (i > 6) return false; // break

    document.write(i + "<br/>");

})
bool func(T, index) 
Enumerable.Repeat("aaa", 10).ForEach(function(s,index)

{

    if (index % 2 == 0) return; // continue

    if (index > 6) return false; // break

    document.write(index + s + "<br/>");

})
Write void () 
Enumerable.Range(1,10).Write()
String separator 
Enumerable.Range(1,10).Write("-")
String separator, T selector(T) 
Enumerable.From([{a:"foo",b:1},{a:"bar",b:3}])

.Write("-","$.a + ':' + $.b")
WriteLine void () 
Enumerable.Range(1,10).WriteLine()
T selector(T) 
Enumerable.From([{a:"foo",b:1},{a:"bar",b:3}])

.WriteLine("$.a + ':' + $.b")
Force void () 
Enumerable.Range(1,10).Trace().Force()

Functional Methods

method name return type arguments example (click code)
Let Enumerable Enumerable<TR> func(Enumerable<T>) 
Enumerable.Range(1,10).Let(function(x){return x.Zip(x.Skip(1),"x,y=>x + ':' + y")})
Share Enumerable () 
var share = Enumerable.Range(1,10).Share();

share.Take(4).WriteLine();

document.write("--- <br>");

share.Skip(2)
MemoizeAll Enumerable () 
var mem = Enumerable.Range(1,10)

.Do("document.write('--->' + $ + '<br>')").MemoizeAll();

mem.Where("$%2==0").WriteLine();

document.write("--- <br>");

mem.Where("$%2==0")

Error Handling Methods

method name return type arguments example (click code)
Catch Enumerable void handler(Error) 
Enumerable.Range(1,10).Select(function(i){

    if(i == 5) throw new Error("enumerable_error"); else return i;})

.Catch("document.write($.message)")
Finally Enumerable void finallyAction() 
Enumerable.Range(1,5).Finally(function(){document.write("finally")})

For Debug Methods

method name return type arguments example (click code)
Trace Enumerable () 
// Trace is output to console.log

Enumerable.Range(1,10).Trace().Force()
String message 
Enumerable.Range(1,10).Trace("Gen").Where("$%3==0").Trace("Filtered").Force()
String message, T selector(T) 
Enumerable.From([{a:"foo",b:1},{a:"bar",b:3}])

.Trace("Gen","$.a").Force()

IEnumerator

method name return type arguments example (click code)
GetEnumerator IEnumerator () 
Enumerable.Range(1,10).GetEnumerator()
MoveNext Boolean () 
Enumerable.Range(1,10).GetEnumerator().MoveNext()
Current T () 
Enumerable.Range(1,10).GetEnumerator().Current()
Dispose void () 
Enumerable.Range(1,10).GetEnumerator().Dispose()

Dictionary

method name return type arguments example (click code)
Add void TKey key, TValue value 
Enumerable.Empty().ToDictionary().Add(1, 'aaa')
Get TValue TKey key 
Enumerable.Empty().ToDictionary().Get(1)
Set Boolean TKey key, TValue value 
Enumerable.Empty().ToDictionary().Set(1, 'zzz')
Contains Boolean TKey key 
Enumerable.Empty().ToDictionary().Contains(1)
Clear void () 
Enumerable.Empty().ToDictionary().Clear()
Remove void TKey key 
Enumerable.Empty().ToDictionary().Remove(1)
Count Number () 
Enumerable.Empty().ToDictionary().Count()
ToEnumerable Enumerable () 
var dict = Enumerable.Empty().ToDictionary();

dict.Add("foo", 10); dict.Add("bar", 200);

dict.ToEnumerable().Select("$.Key + ':' + $.Value")

Lookup

method name return type arguments example (click code)
Get Enumerable<TElement> TKey key 
Enumerable.From([{x:1,s:'a'},{x:1,s:'z'}])

.ToLookup("$.x").Get(1).Select("$.x + ':' + $.s")
Contains Boolean TKey key 
Enumerable.From([{x:1,s:'a'},{x:1,s:'z'}])

.ToLookup("$.x").Contains(1)
Count Number () 
Enumerable.Range(1,5).ToLookup().Count()
ToEnumerable Enumerable<Grouping> () 
Enumerable.From([{a:1,s:'foo'},{a:1,s:'bar'},{a:2,s:'zzzzz'}])

.ToLookup("$.a").ToEnumerable()

.Select("$.Key() + ':' + $.Select('$.s').ToString('-')")

Grouping(inherit Eunmerable)

method name return type arguments example (click code)
Key TKey () 
Enumerable.From([{id:"foo",x:10},{id:"bar",x:20},{id:"foo",x:100}])

.GroupBy("$.id").ToArray()[0] // grouping

.Key()
All Enumerable Methods - - 
var grouping = Enumerable.From([{id:"foo",x:10},{id:"foo",x:25},{id:"foo",x:100}])

.GroupBy("$.id").ToArray()[0];

grouping.Where("$.x % 10 == 0").Select("$.id + ':' + $.x")

jQuery plugin

method name return type arguments example (click code)
TojQuery jQuery () 
// Enumerable.Repeat("foo",10).TojQuery()
toEnumerable Enumerable<jQuery> () 
// $("div").toEnumerable()

RxJS Binding

method name return type arguments example (click code)
ToObservable Rx.Observable () 
// Enumerable.Range(1,10).ToObservable()
ToEnumerable Enumerable () 
// Rx.Observable.Range(1,10).ToEnumerable()

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