[d565449] | 1 | import baseIndexOf from './_baseIndexOf.js';
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| 2 | import toInteger from './toInteger.js';
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| 3 |
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| 4 | /* Built-in method references for those with the same name as other `lodash` methods. */
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| 5 | var nativeMax = Math.max;
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| 6 |
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| 7 | /**
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| 8 | * Gets the index at which the first occurrence of `value` is found in `array`
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| 9 | * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
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| 10 | * for equality comparisons. If `fromIndex` is negative, it's used as the
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| 11 | * offset from the end of `array`.
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| 12 | *
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| 13 | * @static
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| 14 | * @memberOf _
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| 15 | * @since 0.1.0
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| 16 | * @category Array
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| 17 | * @param {Array} array The array to inspect.
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| 18 | * @param {*} value The value to search for.
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| 19 | * @param {number} [fromIndex=0] The index to search from.
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| 20 | * @returns {number} Returns the index of the matched value, else `-1`.
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| 21 | * @example
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| 22 | *
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| 23 | * _.indexOf([1, 2, 1, 2], 2);
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| 24 | * // => 1
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| 25 | *
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| 26 | * // Search from the `fromIndex`.
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| 27 | * _.indexOf([1, 2, 1, 2], 2, 2);
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| 28 | * // => 3
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| 29 | */
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| 30 | function indexOf(array, value, fromIndex) {
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| 31 | var length = array == null ? 0 : array.length;
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| 32 | if (!length) {
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| 33 | return -1;
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| 34 | }
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| 35 | var index = fromIndex == null ? 0 : toInteger(fromIndex);
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| 36 | if (index < 0) {
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| 37 | index = nativeMax(length + index, 0);
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| 38 | }
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| 39 | return baseIndexOf(array, value, index);
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| 40 | }
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| 41 |
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| 42 | export default indexOf;
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