1
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'use strict';
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2
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3
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var slice = Array.prototype.slice;
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4
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var isArgs = require('./isArguments');
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5
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6
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var origKeys = Object.keys;
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7
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var keysShim = origKeys ? function keys(o) { return origKeys(o); } : require('./implementation');
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8
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9
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var originalKeys = Object.keys;
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10
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11
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keysShim.shim = function shimObjectKeys() {
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12
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if (Object.keys) {
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13
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var keysWorksWithArguments = (function () {
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14
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// Safari 5.0 bug
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15
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var args = Object.keys(arguments);
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16
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return args && args.length === arguments.length;
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17
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}(1, 2));
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18
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if (!keysWorksWithArguments) {
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19
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Object.keys = function keys(object) { // eslint-disable-line func-name-matching
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20
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if (isArgs(object)) {
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21
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return originalKeys(slice.call(object));
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22
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}
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23
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return originalKeys(object);
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24
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};
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25
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}
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26
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} else {
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27
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Object.keys = keysShim;
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28
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}
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29
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return Object.keys || keysShim;
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30
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};
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31
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|
32
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module.exports = keysShim;
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