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Core.String Module (F#)

Functional programming operators for string processing. Further string operations are available via the member functions on strings and other functionality in String and Regex types.

Namespace/Module Path: Microsoft.FSharp.Core

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

module String

Value

Description

collect : (char -> string) -> string -> string

Creates a new string whose characters are the results of applying a specified function to each of the characters of the input string and concatenating the resulting strings.

concat : string -> seq<string> -> string

Returns a new string made by concatenating the given strings with a separator.

exists : (char -> bool) -> string -> bool

Tests if any character of the string satisfies the given predicate.

forall : (char -> bool) -> string -> bool

Tests if all characters in the string satisfy the given predicate.

init : int -> (int -> string) -> string

Creates a new string whose characters are the results of applying a specified function to each index and concatenating the resulting strings.

iter : (char -> unit) -> string -> unit

Applies a specified function to each character in the string.

iteri : (int -> char -> unit) -> string -> unit

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

length : string -> int

Returns the length of the string.

map : (char -> char) -> string -> string

Creates a new string whose characters are the results of applying a specified function to each of the characters of the input string.

mapi : (int -> char -> char) -> string -> string

Creates a new string whose characters are the results of applying a specified function to each character and index of the input string.

replicate : int -> string -> string

Returns a string by concatenating a specified number of instances of a string.

Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2

F# Core Library Versions

Supported in: 2.0, 4.0, Portable

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