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

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

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


arg1 Type: 'T1

The first argument.

arg2 Type: 'T2

The second argument.

func Type: 'T1 -> 'T2 -> 'U

The function.

Return Value

The function result.


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") ||&gt; append gives "abc.def"
result2: "ABC.DEF"


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.Operators Module (F#)

Microsoft.FSharp.Core Namespace (F#)

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