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Seq.reduce<'T> Function (F#)

  • Article

Applies a function to each element of the sequence, threading an accumulator argument through the computation. This function begins by applying the function to the first two elements. It then passes this result into the function along with the third element and so on. The function returns the final result.

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

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

// Signature:
Seq.reduce : ('T -> 'T -> 'T) -> seq<'T> -> 'T

// Usage:
Seq.reduce reduction source

Parameters

  • reduction
    Type: 'T -> 'T -> 'T

    A function that takes in the current accumulated result and the next element of the sequence to produce the next accumulated result.

  • source
    Type: seq<'T>

    The input sequence.

Exceptions

Exception

Condition

ArgumentException

Thrown when the input sequence is empty.

ArgumentNullException

Thrown when the input sequence is null.

Return Value

The result of the computation.

Remarks

This function is named Reduce in compiled assemblies. If you are accessing the function from a 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#)