Bump to v4.0.0.

intersection.js

@@ -0,0 +1,27 @@
+var arrayMap = require('./internal/arrayMap'),
+    baseIntersection = require('./internal/baseIntersection'),
+    rest = require('./rest'),
+    toArrayLikeObject = require('./internal/toArrayLikeObject');
+
+/**
+ * Creates an array of unique values that are included in all of the provided
+ * arrays using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * for equality comparisons.
+ *
+ * @static
+ * @memberOf _
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @returns {Array} Returns the new array of shared values.
+ * @example
+ * _.intersection([2, 1], [4, 2], [1, 2]);
+ * // => [2]
+ */
+var intersection = rest(function(arrays) {
+  var mapped = arrayMap(arrays, toArrayLikeObject);
+  return (mapped.length && mapped[0] === arrays[0])
+    ? baseIntersection(mapped)
+    : [];
+});
+
+module.exports = intersection;