more work

node_modules/lodash/internal/assignWith.js

@@ -0,0 +1,41 @@
+var getSymbols = require('./getSymbols'),
+    keys = require('../object/keys');
+
+/** Used for native method references. */
+var arrayProto = Array.prototype;
+
+/** Native method references. */
+var push = arrayProto.push;
+
+/**
+ * A specialized version of `_.assign` for customizing assigned values without
+ * support for argument juggling, multiple sources, and `this` binding `customizer`
+ * functions.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @param {Function} customizer The function to customize assigned values.
+ * @returns {Object} Returns `object`.
+ */
+function assignWith(object, source, customizer) {
+  var props = keys(source);
+  push.apply(props, getSymbols(source));
+
+  var index = -1,
+      length = props.length;
+
+  while (++index < length) {
+    var key = props[index],
+        value = object[key],
+        result = customizer(value, source[key], key, object, source);
+
+    if ((result === result ? (result !== value) : (value === value)) ||
+        (value === undefined && !(key in object))) {
+      object[key] = result;
+    }
+  }
+  return object;
+}
+
+module.exports = assignWith;