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Array2D.mapi<'T,'U> Function (F#)

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

Builds a new array whose elements are the results of applying the given function to each of the elements of the array. The integer indices passed to the function indicates the element being transformed.

Namespace/Module Path: Microsoft.FSharp.Collections.Array2D

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


// Signature:
Array2D.mapi : (int -> int -> 'T -> 'U) -> 'T [,] -> 'U [,]

// Usage:
Array2D.mapi mapping array


mapping Type: int->int-> 'T -> 'U

A function that is applied to transform each element of the array. The two integers provide the index of the element.

array Type: 'T[,]

The input array.

Return Value

An array whose elements have been transformed by the given mapping.


For non-zero-based arrays the basing on an input array will be propagated to the output array.

This function is named MapIndexed in compiled assemblies. If you are accessing the member 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.Array2D Module (F#)

Microsoft.FSharp.Collections Namespace (F#)

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