MappedByIndex function

Fully qualified name: Std.Arrays.MappedByIndex

function MappedByIndex<'T, 'U>(mapper : ((Int, 'T) -> 'U), array : 'T[]) : 'U[]

Summary

Given an array and a function that is defined for the indexed elements of the array, returns a new array that consists of the images of the original array under the function.

Type Parameters

'T

The type of array elements.

'U

The result type of the mapper function.

Input

mapper

A function from (Int, 'T) to 'U that is used to map elements and their indices.

array

An array of elements over 'T.

Output

An array 'U[] of elements that are mapped by the mapper function.

Example

The following two lines are equivalent:

let array = MappedByIndex(f, [x0, x1, x2]);

and

let array = [f(0, x0), f(1, x1), f(2, x2)];

See Also

• Microsoft.Quantum.Arrays.Mapped