_baseFindIndex.js (766B)
1 /** 2 * The base implementation of `_.findIndex` and `_.findLastIndex` without 3 * support for iteratee shorthands. 4 * 5 * @private 6 * @param {Array} array The array to inspect. 7 * @param {Function} predicate The function invoked per iteration. 8 * @param {number} fromIndex The index to search from. 9 * @param {boolean} [fromRight] Specify iterating from right to left. 10 * @returns {number} Returns the index of the matched value, else `-1`. 11 */ 12 function baseFindIndex(array, predicate, fromIndex, fromRight) { 13 var length = array.length, 14 index = fromIndex + (fromRight ? 1 : -1); 15 16 while ((fromRight ? index-- : ++index < length)) { 17 if (predicate(array[index], index, array)) { 18 return index; 19 } 20 } 21 return -1; 22 } 23 24 module.exports = baseFindIndex;