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Set.filter<'T> Function (F#)

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

Returns a new collection containing only the elements of the collection for which the given predicate returns true.

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

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


// Signature:
Set.filter : ('T -> bool) -> Set<'T> -> Set<'T> (requires comparison)

// Usage:
Set.filter predicate set


predicate Type: 'T ->bool

The function to test set elements.

set Type: Set<'T>

The input set.

Return Value

The set containing only the elements for which predicate returns true.


This function is named Filter in compiled assemblies. If you are accessing the function from a language other than F#, or through reflection, use this name.


let set1 = Set.ofList [ 1 .. 10]
           |> Set.filter (fun elem -> elem % 2 = 0)
printfn "%A" set1


set [2; 4; 6; 8; 10]


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.Set Module (F#)

Microsoft.FSharp.Collections Namespace (F#)

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