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String.iteri Function (F#)

Den Delimarsky|Last Updated: 8/18/2017
|
1 Contributor

Applies a specified function to each character and corresponding index in the string.

Namespace/Module Path: Microsoft.FSharp.Core.String

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

Syntax

// Signature:
String.iteri : (int -> char -> unit) -> string -> unit

// Usage:
String.iteri action str

Parameters

action Type: int->char->unit

The function to apply to each character and index of the string.

str Type: string

The input string.

Exceptions

ExceptionCondition
ArgumentNullExceptionThrown when the input string is null.

Remarks

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

Example


let enumerateCharacters inputString = 
    String.iteri (fun i c -> printfn "%d %c" i c) inputString
enumerateCharacters "TIME"
enumerateCharacters "SPACE"

Output

0 T
1 I
2 M
3 E
0 S
1 P
2 A
3 C
4 E

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

See Also

Core.String Module (F#)

Microsoft.FSharp.Core Namespace (F#)

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