Bump to v4.0.0.

intersectionWith.js

@@ -0,0 +1,40 @@
+import arrayMap from './internal/arrayMap';
+import baseIntersection from './internal/baseIntersection';
+import last from './last';
+import rest from './rest';
+import toArrayLikeObject from './internal/toArrayLikeObject';
+
+/**
+ * This method is like `_.intersection` 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 shared values.
+ * @example
+ *
+ * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+ * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+ *
+ * _.intersectionWith(objects, others, _.isEqual);
+ * // => [{ 'x': 1, 'y': 2 }]
+ */
+var intersectionWith = rest(function(arrays) {
+  var comparator = last(arrays),
+      mapped = arrayMap(arrays, toArrayLikeObject);
+
+  if (comparator === last(mapped)) {
+    comparator = undefined;
+  } else {
+    mapped.pop();
+  }
+  return (mapped.length && mapped[0] === arrays[0])
+    ? baseIntersection(mapped, undefined, comparator)
+    : [];
+});
+
+export default intersectionWith;