| var baseFindIndex = require('./_baseFindIndex'), |
| baseIteratee = require('./_baseIteratee'), |
| toInteger = require('./toInteger'); |
| |
| /* 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 `_.findIndex` except that it iterates over elements |
| * of `collection` from right to left. |
| * |
| * @static |
| * @memberOf _ |
| * @since 2.0.0 |
| * @category Array |
| * @param {Array} array The array to inspect. |
| * @param {Function} [predicate=_.identity] The function invoked per iteration. |
| * @param {number} [fromIndex=array.length-1] The index to search from. |
| * @returns {number} Returns the index of the found element, else `-1`. |
| * @example |
| * |
| * var users = [ |
| * { 'user': 'barney', 'active': true }, |
| * { 'user': 'fred', 'active': false }, |
| * { 'user': 'pebbles', 'active': false } |
| * ]; |
| * |
| * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; }); |
| * // => 2 |
| * |
| * // The `_.matches` iteratee shorthand. |
| * _.findLastIndex(users, { 'user': 'barney', 'active': true }); |
| * // => 0 |
| * |
| * // The `_.matchesProperty` iteratee shorthand. |
| * _.findLastIndex(users, ['active', false]); |
| * // => 2 |
| * |
| * // The `_.property` iteratee shorthand. |
| * _.findLastIndex(users, 'active'); |
| * // => 0 |
| */ |
| function findLastIndex(array, predicate, fromIndex) { |
| var length = array == null ? 0 : array.length; |
| if (!length) { |
| return -1; |
| } |
| var index = length - 1; |
| if (fromIndex !== undefined) { |
| index = toInteger(fromIndex); |
| index = fromIndex < 0 |
| ? nativeMax(length + index, 0) |
| : nativeMin(index, length - 1); |
| } |
| return baseFindIndex(array, baseIteratee(predicate, 3), index, true); |
| } |
| |
| module.exports = findLastIndex; |