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Set.IsSubsetOf<'T> Method (F#)

Evaluates to true if all elements of the first set are in the second.

Namespace/Module Path: Microsoft.FSharp.Collections

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

// Signature:
member this.IsSubsetOf : Set<'T> -> bool (requires comparison)

// Usage:
set.IsSubsetOf (otherSet)

otherSet

Type: Set<'T>

The set to test against.

true if this set is a subset of otherSet. Otherwise, returns false.

The following code illustrates the use of the IsSubsetOf method.

let set1 = Set.ofList [ 1 .. 6 ]
let set2 = Set.ofList [ 1 .. 5 ]
let set3 = Set.ofList [ 1 .. 6 ]
let set4 = Set.ofList [ 5 .. 10 ]
printfn "%A is a subset of %A: %b" set2 set1 (set2.IsSubsetOf set1)
printfn "%A is a subset of %A: %b" set3 set1 (set3.IsSubsetOf set1) 
printfn "%A is a subset of %A: %b" set4 set1 (set4.IsSubsetOf set1) 

Output

set [1; 2; 3; 4; 5] is a subset of set [1; 2; 3; 4; 5; 6]: true
set [1; 2; 3; 4; 5; 6] is a subset of set [1; 2; 3; 4; 5; 6]: true
set [5; 6; 7; 8; 9; 10] is a subset of set [1; 2; 3; 4; 5; 6]: true

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

F# Core Library Versions

Supported in: 2.0, 4.0, Portable

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