sortedIndexOf.js (762B)
1 var baseSortedIndex = require('./_baseSortedIndex'), 2 eq = require('./eq'); 3 4 /** 5 * This method is like `_.indexOf` except that it performs a binary 6 * search on a sorted `array`. 7 * 8 * @static 9 * @memberOf _ 10 * @since 4.0.0 11 * @category Array 12 * @param {Array} array The array to inspect. 13 * @param {*} value The value to search for. 14 * @returns {number} Returns the index of the matched value, else `-1`. 15 * @example 16 * 17 * _.sortedIndexOf([4, 5, 5, 5, 6], 5); 18 * // => 1 19 */ 20 function sortedIndexOf(array, value) { 21 var length = array == null ? 0 : array.length; 22 if (length) { 23 var index = baseSortedIndex(array, value); 24 if (index < length && eq(array[index], value)) { 25 return index; 26 } 27 } 28 return -1; 29 } 30 31 module.exports = sortedIndexOf;