| 1 | var makeIterator = require('../function/makeIterator_');
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| 2 |
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| 3 | /**
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| 4 | * Returns the index of the first item that matches criteria
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| 5 | */
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| 6 | function findIndex(arr, iterator, thisObj){
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| 7 | iterator = makeIterator(iterator, thisObj);
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| 8 | if (arr == null) {
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| 9 | return -1;
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| 10 | }
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| 11 |
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| 12 | var i = -1, len = arr.length;
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| 13 | while (++i < len) {
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| 14 | if (iterator(arr[i], i, arr)) {
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| 15 | return i;
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| 16 | }
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| 17 | }
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| 18 |
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| 19 | return -1;
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| 20 | }
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| 21 |
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| 22 | module.exports = findIndex;
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| 23 |
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