Array.sortInPlaceBy<'T,'Key> Function (F#)

Sorts the elements of an array by mutating the array in place, using the given projection for the keys. Elements are compared using Operators.compare.

Namespace/Module Path: Microsoft.FSharp.Collections.Array

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

// Signature:
Array.sortInPlaceBy : ('T -> 'Key) -> 'T [] -> unit (requires comparison)

// Usage:
Array.sortInPlaceBy projection array

Parameters

• projection
  Type: 'T -> 'Key

  The function to transform array elements into the type that is compared.

• array
  Type: 'T []

  The input array.

Remarks

This is not a stable sort, that is, the original order of equal elements might not be preserved. For a stable sort, consider using Seq.sort.

This function is named SortInPlaceBy 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 illustrates the use of Array.sortInPlaceBy.

let array1 = [|1; 4; 8; -2; 5|]
Array.sortInPlaceBy (fun elem -> abs elem) array1
printfn "%A" array1

Output

[|-2; 1; 4; 5; 8|]

Platforms

Windows 7, Windows Vista SP2, Windows XP SP3, Windows XP x64 SP2, Windows Server 2008 R2, Windows Server 2008 SP2, Windows Server 2003 SP2

Version Information

F# Runtime

Supported in: 2.0, 4.0

Silverlight

Supported in: 3

See Also

Reference

Collections.Array Module (F#)

Microsoft.FSharp.Collections Namespace (F#)