use directories for structure

node_modules/object.assign/implementation.js

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