var isObject = require('./isObject.js');
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var _setup = require('./_setup.js');
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var _has = require('./_has.js');
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var _collectNonEnumProps = require('./_collectNonEnumProps.js');
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// Retrieve the names of an object's own properties.
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// Delegates to **ECMAScript 5**'s native `Object.keys`.
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function keys(obj) {
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if (!isObject(obj)) return [];
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if (_setup.nativeKeys) return _setup.nativeKeys(obj);
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var keys = [];
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for (var key in obj) if (_has(obj, key)) keys.push(key);
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// Ahem, IE < 9.
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if (_setup.hasEnumBug) _collectNonEnumProps(obj, keys);
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return keys;
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}
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module.exports = keys;
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