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QueryBuilder.Exists<'T,'Q> Method (F#)

A query operator that determines whether any element selected so far satisfies a condition.

Namespace/Module Path: Microsoft.FSharp.Linq

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

// Signature:
member this.Exists : QuerySource<'T,'Q> * ('T -> bool) -> bool

// Usage:
queryBuilder.Exists (source, predicate)


Type: QuerySource<'T,'Q>

The input query.


Type: 'T -> bool

A function that tests each element.

true if any element of the source query satisfies predicate.

For more information and examples, see Query Expressions (F#).

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

F# Core Library Versions

Supported in: 4.0, Portable

© 2014 Microsoft