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

  • Článek

Returns the lowest of all elements of the list, compared by using Operators.min on the function result.

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

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

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

// Usage:
List.minBy projection list

Parameters

  • projection
    Type: 'T -> 'U

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

  • list
    Type: 'T list

    The input list.

Exceptions

Exception

Condition

ArgumentException

Thrown when the list is empty.

Return Value

The minimum value.

Remarks

This function is named MinBy 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 shows how to use List.minBy.

[ -10.0 .. 10.0 ]
|> List.minBy (fun x -> x * x - 1.0)
|> 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.List Module (F#)

Microsoft.FSharp.Collections Namespace (F#)

Change History

Date

History

Reason

August 2010

Added code example.

Information enhancement.