Operators.( ||> )<'T1,'T2,'U> Function (F#)

  • Article

Apply a function to two values, the values being a pair on the left, the function on the right.

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

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

// Signature:
( ||> ) : 'T1 * 'T2 -> ('T1 -> 'T2 -> 'U) -> 'U

// Usage:
(arg1, arg2) ||> func

Parameters

  • arg1
    Type: 'T1

    The first argument.

  • arg2
    Type: 'T2

    The second argument.

  • func
    Type: 'T1 -> 'T2 -> 'U

    The function.

Return Value

The function result.

Example

The following example demonstrates the use of the ||> operator.

let append string1 string2 = string1 + "." + string2

let result1 = ("abc", "def") ||> append
printfn "(\"abc\", \"def\") ||> append gives %A" result1

let toUpper (string1:string) (string2:string) = string1.ToUpper(), string2.ToUpper()

let result2 = ("abc", "def")
               ||> toUpper
               ||> append

printfn "result2: %A" result2

("abc", "def") ||> append gives "abc.def"
result2: "ABC.DEF"

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

Reference

Core.Operators Module (F#)

Microsoft.FSharp.Core Namespace (F#)