Source: \lastIndexOf.js
import baseFindIndex from './.internal/baseFindIndex.js'
import baseIsNaN from './.internal/baseIsNaN.js'
import strictLastIndexOf from './.internal/strictLastIndexOf.js'
/**
* This method is like `indexOf` except that it iterates over elements of
* `array` from right to left.
*
* @since 0.1.0
* @category Array
* @param {Array} array The array to inspect.
* @param {*} value The value to search for.
* @param {number} [fromIndex=array.length-1] The index to search from.
* @returns {number} Returns the index of the matched value, else `-1`.
* @example
*
* lastIndexOf([1, 2, 1, 2], 2)
* // => 3
*
* // Search from the `fromIndex`.
* lastIndexOf([1, 2, 1, 2], 2, 2)
* // => 1
*/
function lastIndexOf(array, value, fromIndex) {
const length = array == null ? 0 : array.length
if (!length) {
return -1
}
let index = length
if (fromIndex !== undefined) {
index = index < 0 ? Math.max(length + index, 0) : Math.min(index, length - 1)
}
return value === value
? strictLastIndexOf(array, value, index)
: baseFindIndex(array, baseIsNaN, index, true)
}
export default lastIndexOf