Array.map<'T,'U> Function (F#)
Builds a new array whose elements are the results of applying the given function to each of the elements of the array.
Namespace/Module Path: Microsoft.FSharp.Collections.Array
Assembly: FSharp.Core (in FSharp.Core.dll)
// Signature:
Array.map : ('T -> 'U) -> 'T [] -> 'U []
// Usage:
Array.map mapping array
Parameters
mapping
Type: 'T -> 'UThe function to transform elements of the array.
array
Type: 'T[]The input array.
Return Value
The array of transformed elements.
Remarks
This function is named Map in compiled assemblies. If you are accessing the function from a language other than F#, or through reflection, use this name.
Example
The following code example shows how to use Array.map.
let data = [| 1; 2; 3; 4 |]
let r1 = data |> Array.map (fun x -> x + 1)
printfn "Adding '1' using map = %A" r1
let r2 = data |> Array.map string
printfn "Converting to strings by using map = %A" r2
let r3 = data |> Array.map (fun x -> (x, x))
printfn "Converting to tupels by using map = %A" r3
Output
Adding '1' using map = [|2; 3; 4; 5|] Converting to strings by using map = [|"1"; "2"; "3"; "4"|] Converting to tuples by using map = [|(1, 1); (2, 2); (3, 3); (4, 4)|]
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