Seq.concat<'Collection,'T> Function (F#)
Combines the given enumeration-of-enumerations as a single concatenated enumeration.
Namespace/Module Path: Microsoft.FSharp.Collections.Seq
Assembly: FSharp.Core (in FSharp.Core.dll)
// Signature:
Seq.concat : seq<'Collection> -> seq<'T> (requires 'Collection :> seq<'T>)
// Usage:
Seq.concat sources
Parameters
sources
Type: seq<'Collection>The input enumeration-of-enumerations.
Exceptions
Exception |
Condition |
|---|---|
Thrown when the input sequence is null. |
Return Value
The result sequence.
Remarks
The returned sequence may be passed between threads safely. However, individual IEnumerator values generated from the returned sequence should not be accessed concurrently.
This function is named Concat in compiled assemblies. If you are accessing the function from a language other than F#, or through reflection, use this name.
Example
The following code shows how to use Seq.concat.
// Using Seq.append to append an array to a list.
let seq1to10 = Seq.append [1; 2; 3] [| 4; 5; 6; 7; 8; 9; 10 |]
// Using Seq.concat to concatenate a list of arrays.
let seqResult = Seq.concat [ [| 1; 2; 3 |]; [| 4; 5; 6 |]; [|7; 8; 9|] ]
Seq.iter (fun elem -> printf "%d " elem) seq1to10
printfn ""
Seq.iter (fun elem -> printf "%d " elem) seqResult
Output
1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9
Platforms
Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2
Version Information
F# Core Library Versions
Supported in: 2.0, 4.0, Portable