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

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

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

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

// Signature:
List.maxBy : ('T -> 'U) -> 'T list -> 'T (requires comparison)

// Usage:
List.maxBy projection list


Type: 'T -> 'U

The function to transform the list elements into the type to be compared.


Type: 'T list

The input list.




Thrown when the list is empty.

The maximum element.

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.

The following code shows how to use List.maxBy.

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



Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2

F# Core Library Versions

Supported in: 2.0, 4.0, Portable

© 2015 Microsoft