more work

node_modules/lodash/internal/baseAssign.js

@@ -0,0 +1,40 @@
+var baseCopy = require('./baseCopy'),
+    getSymbols = require('./getSymbols'),
+    isNative = require('../lang/isNative'),
+    keys = require('../object/keys');
+
+/** Native method references. */
+var preventExtensions = isNative(Object.preventExtensions = Object.preventExtensions) && preventExtensions;
+
+/** Used as `baseAssign`. */
+var nativeAssign = (function() {
+  // Avoid `Object.assign` in Firefox 34-37 which have an early implementation
+  // with a now defunct try/catch behavior. See https://bugzilla.mozilla.org/show_bug.cgi?id=1103344
+  // for more details.
+  //
+  // Use `Object.preventExtensions` on a plain object instead of simply using
+  // `Object('x')` because Chrome and IE fail to throw an error when attempting
+  // to assign values to readonly indexes of strings in strict mode.
+  var object = { '1': 0 },
+      func = preventExtensions && isNative(func = Object.assign) && func;
+
+  try { func(preventExtensions(object), 'xo'); } catch(e) {}
+  return !object[1] && func;
+}());
+
+/**
+ * The base implementation of `_.assign` without support for argument juggling,
+ * multiple sources, and `customizer` functions.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @returns {Object} Returns `object`.
+ */
+var baseAssign = nativeAssign || function(object, source) {
+  return source == null
+    ? object
+    : baseCopy(source, getSymbols(source), baseCopy(source, keys(source), object));
+};
+
+module.exports = baseAssign;