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x/lodash/lastIndexOf.js

A modern JavaScript utility library delivering modularity, performance, & extras.
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import baseFindIndex from './_baseFindIndex.js';import baseIsNaN from './_baseIsNaN.js';import toInteger from './toInteger.js';
/* Built-in method references for those with the same name as other `lodash` methods. */var nativeMax = Math.max, nativeMin = Math.min;
/** * This method is like `_.indexOf` except that it iterates over elements of * `array` from right to left. * * @static * @memberOf _ * @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) { var length = array ? array.length : 0; if (!length) { return -1; } var index = length; if (fromIndex !== undefined) { index = toInteger(fromIndex); index = ( index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1) ) + 1; } if (value !== value) { return baseFindIndex(array, baseIsNaN, index - 1, true); } while (index--) { if (array[index] === value) { return index; } } return -1;}
export default lastIndexOf;