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

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

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

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

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


// Signature:
Seq.maxBy : ('T -> 'U) -> seq<'T> -> 'T (requires comparison)

// Usage:
Seq.maxBy projection source


projection Type: 'T -> 'U

A function to transform items from the input sequence into comparable keys.

source Type: seq<'T>

The input sequence.


ArgumentExceptionThrown when the input sequence is empty.
ArgumentNullExceptionThrown when the input sequence is null.

Return Value

The result sequence.


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.


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

Collections.Seq Module (F#)

Microsoft.FSharp.Collections Namespace (F#)

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