Bump to v3.7.0.

internal/assignWith.js

@@ -0,0 +1,44 @@
+define(['./getSymbols', '../object/keys'], function(getSymbols, keys) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /** 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;
+  }
+
+  return assignWith;
+});