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Seq.scan<'T,'State> Function (F#)

Like Seq.fold, but computes on-demand and returns the sequence of intermediate and final results.

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

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

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

// Usage:
Seq.scan folder state source

folder

Type: 'State -> 'T -> 'State

A function that updates the state with each element from the sequence.

state

Type: 'State

The initial state.

source

Type: seq<'T>

The input sequence.

Exception

Condition

ArgumentNullException

Thrown when the input sequence is null.

The result sequence.

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

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

F# Runtime

Supported in: 2.0, 4.0

Silverlight

Supported in: 3

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