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Direktori : /home/opti/workflow/node_modules/es5-ext/object/
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Current File : /home/opti/workflow/node_modules/es5-ext/object/first-key.js

"use strict";

var value                   = require("./valid-value")
  , objPropertyIsEnumerable = Object.prototype.propertyIsEnumerable;

module.exports = function (obj) {
	var i;
	value(obj);
	for (i in obj) {
		if (objPropertyIsEnumerable.call(obj, i)) return i;
	}
	return null;
};

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