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14 lines
287 B
JavaScript
14 lines
287 B
JavaScript
"use strict";
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var value = require("./valid-value")
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, objPropertyIsEnumerable = Object.prototype.propertyIsEnumerable;
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module.exports = function (obj) {
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var i;
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value(obj);
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for (i in obj) {
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if (objPropertyIsEnumerable.call(obj, i)) return i;
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}
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return null;
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};
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