Adding integrated tile server

[simantics/district.git] / org.simantics.maps.server / node / node-v4.8.0-win-x64 / node_modules / npm / node_modules / node-gyp / node_modules / path-array / node_modules / array-index / node_modules / es6-symbol / node_modules / es5-ext / object / first-key.js

'use strict';

var value = require('./valid-value')

  , propertyIsEnumerable = Object.prototype.propertyIsEnumerable;

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