Seq.where<'T> Function (F#)
Returns a new collection containing only the elements of the collection for which the given predicate returns true.
Namespace/Module Path: Microsoft.FSharp.Collections.Seq
Assembly: FSharp.Core (in FSharp.Core.dll)
// Signature:
where : ('T -> bool) -> seq<'T> -> seq<'T>
// Usage:
Seq.where predicate source
Parameters
predicate
Type: 'T -> boolA function to test whether each item in the input sequence should be included in the output.
source
Type: seq<'T>The input sequence.
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. Remember that sequence is subject to lazy evaluation, which means that effects are delayed until it is enumerated. This function is a synonym for Seq.filter.
This function is named Where in the .NET assembly. If accessing the member from a .NET language other than F#, or through reflection, use this name.
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
.0