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