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30 lines
742 B
30 lines
742 B
var baseSortedIndex = require('./_baseSortedIndex'),
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eq = require('./eq');
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/**
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* This method is like `_.lastIndexOf` except that it performs a binary
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* search on a sorted `array`.
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*
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* @static
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* @memberOf _
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* @category Array
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* @param {Array} array The array to search.
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* @param {*} value The value to search for.
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* @returns {number} Returns the index of the matched value, else `-1`.
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* @example
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*
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* _.sortedLastIndexOf([1, 1, 2, 2], 2);
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* // => 3
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*/
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function sortedLastIndexOf(array, value) {
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var length = array ? array.length : 0;
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if (length) {
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var index = baseSortedIndex(array, value, true) - 1;
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if (eq(array[index], value)) {
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return index;
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}
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}
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return -1;
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}
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module.exports = sortedLastIndexOf;
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