25 lines
537 B
JavaScript
25 lines
537 B
JavaScript
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'use strict';
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var _keys = require('async.util.keys');
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var isArrayLike = require('async.util.isarraylike');
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module.exports = function keyIterator(coll) {
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var i = -1;
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var len;
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var keys;
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if (isArrayLike(coll)) {
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len = coll.length;
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return function next() {
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i++;
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return i < len ? i : null;
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};
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} else {
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keys = _keys(coll);
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len = keys.length;
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return function next() {
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i++;
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return i < len ? keys[i] : null;
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};
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}
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};
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