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Seq.pick<'T,'U> Function (F#)

  • Artykuł

Applies the given function to successive elements, returning the first value where the function returns a Some value.

Namespace/Module Path: Microsoft.FSharp.Collections.Seq

Assembly: FSharp.Core (in FSharp.Core.dll)

// Signature:
Seq.pick : ('T -> 'U option) -> seq<'T> -> 'U

// Usage:
Seq.pick chooser source

Parameters

  • chooser
    Type: 'T -> 'U option

    A function to transform each item of the input sequence into an option of the output type.

  • source
    Type: seq<'T>

    The input sequence.

Exceptions

Exception

Condition

ArgumentNullException

Thrown when the input sequence is null.

KeyNotFoundException

Thrown when every item of the sequence evaluates to None when the given function is applied.

Return Value

The result sequence.

Remarks

This function is named Pick in compiled assemblies. If you are accessing the function from a .NET language other than F#, or through reflection, use this name.

Platforms

Windows 7, Windows Vista SP2, Windows XP SP3, Windows XP x64 SP2, Windows Server 2008 R2, Windows Server 2008 SP2, Windows Server 2003 SP2

Version Information

F# Runtime

Supported in: 2.0, 4.0

Silverlight

Supported in: 3

See Also

Reference

Collections.Seq Module (F#)

Microsoft.FSharp.Collections Namespace (F#)