Function findLastIndex

Find the index of the last value which matches a predicate.

Returns

The index of the last matching value, or -1 if no matching value is found.

Notes

If start < stop the search will wrap at the front of the array.

Complexity

Linear.

Undefined Behavior

A start or stop which is non-integral.

Modifying the length of the array while searching.

Example

import { ArrayExt } from '@lumino/algorithm';

function isEven(value: number): boolean {
  return value % 2 === 0;
}

let data = [1, 2, 3, 4, 3, 2, 1];
ArrayExt.findLastIndex(data, isEven);        // 5
ArrayExt.findLastIndex(data, isEven, 4);     // 3
ArrayExt.findLastIndex(data, isEven, 0);     // -1
ArrayExt.findLastIndex(data, isEven, 0, 1);  // 5