source: trip-planner-front/node_modules/object.assign/implementation.js@ e29cc2e

'use strict';

// modified from https://github.com/es-shims/es6-shim
var keys = require('object-keys');
var canBeObject = function (obj) {
        return typeof obj !== 'undefined' && obj !== null;
};
var hasSymbols = require('has-symbols/shams')();
var callBound = require('call-bind/callBound');
var toObject = Object;
var $push = callBound('Array.prototype.push');
var $propIsEnumerable = callBound('Object.prototype.propertyIsEnumerable');
var originalGetSymbols = hasSymbols ? Object.getOwnPropertySymbols : null;

// eslint-disable-next-line no-unused-vars
module.exports = function assign(target, source1) {
        if (!canBeObject(target)) { throw new TypeError('target must be an object'); }
        var objTarget = toObject(target);
        var s, source, i, props, syms, value, key;
        for (s = 1; s < arguments.length; ++s) {
                source = toObject(arguments[s]);
                props = keys(source);
                var getSymbols = hasSymbols && (Object.getOwnPropertySymbols || originalGetSymbols);
                if (getSymbols) {
                        syms = getSymbols(source);
                        for (i = 0; i < syms.length; ++i) {
                                key = syms[i];
                                if ($propIsEnumerable(source, key)) {
                                        $push(props, key);
                                }
                        }
                }
                for (i = 0; i < props.length; ++i) {
                        key = props[i];
                        value = source[key];
                        if ($propIsEnumerable(source, key)) {
                                objTarget[key] = value;
                        }
                }
        }
        return objTarget;
};