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Array.tryFindIndex<'T> Function (F#)

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

Returns the index of the first element in the array that satisfies the given predicate.

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

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


// Signature:
Array.tryFindIndex : ('T -> bool) -> 'T [] -> int option

// Usage:
Array.tryFindIndex predicate array


predicate Type: 'T ->bool

The function to test the input elements.

array Type: 'T[]

The input array.

Result Value

The index of the first element that satisfies the predicate, or None.


This function is named TryFindIndex 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.Array Module (F#)

Microsoft.FSharp.Collections Namespace (F#)

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