| 1 | import globalize from './internal/globalize';
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| 2 |
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| 3 | /**
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| 4 | * Finds the index of an element in the array.
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| 5 | *
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| 6 | * @param {Array} The array being searched.
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| 7 | * @param {Mixed} item Element which will be searched for.
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| 8 | * @param {Integer} fromIndex The index from which the item will be searched. Negative values will search from the end of the array.
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| 9 | *
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| 10 | * @returns {Integer}
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| 11 | */
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| 12 | function indexOf (array, item, fromIndex) {
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| 13 | var length = array.length;
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| 14 |
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| 15 | if (!fromIndex) {
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| 16 | fromIndex = 0;
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| 17 | } else if (fromIndex < 0) {
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| 18 | fromIndex = Math.max(0, length + fromIndex);
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| 19 | }
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| 20 |
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| 21 | for (var i = fromIndex; i < length; i++) {
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| 22 | if (array[i] === item) {
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| 23 | return i;
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| 24 | }
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| 25 | }
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| 26 |
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| 27 | return -1;
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| 28 | }
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| 29 |
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| 30 | globalize('indexOf', indexOf);
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| 31 |
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| 32 | export default indexOf;
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