Bump to v4.0.0.

xorWith.js

@@ -0,0 +1,34 @@
+import arrayFilter from './internal/arrayFilter';
+import baseXor from './internal/baseXor';
+import isArrayLikeObject from './isArrayLikeObject';
+import last from './last';
+import rest from './rest';
+
+/**
+ * This method is like `_.xor` except that it accepts `comparator` which is
+ * invoked to compare elements of `arrays`. The comparator is invoked with
+ * two arguments: (arrVal, othVal).
+ *
+ * @static
+ * @memberOf _
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new array of values.
+ * @example
+ *
+ * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+ * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+ *
+ * _.xorWith(objects, others, _.isEqual);
+ * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
+ */
+var xorWith = rest(function(arrays) {
+  var comparator = last(arrays);
+  if (isArrayLikeObject(comparator)) {
+    comparator = undefined;
+  }
+  return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
+});
+
+export default xorWith;