Array.maxBy<'T,'U> Function (F#)

Returns the greatest of all elements of the array, compared by using Operators.max on the function result.

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

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

// Signature:
Array.maxBy : ('T -> 'U) -> 'T [] -> 'T (requires comparison)

// Usage:
Array.maxBy projection array

Parameters

• projection
  Type: 'T -> 'U

  The function to transform the elements into a type supporting comparison.

• array
  Type: 'T []

  The input array.

Exceptions

Return Value

The maximum element.

Remarks

This function is named MaxBy 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 demonstrates the use of Array.maxBy.

[| -10.0 .. 10.0 |]
|> Array.maxBy (fun x -> 1.0 - x * x)
|> printfn "%A"

Output

0.0

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#)