Beta 7 with some repo names changed.

Client/node_modules/es5-ext/array/#/intersection.js

@@ -0,0 +1,19 @@
+"use strict";
+
+var value    = require("../../object/valid-value")
+  , contains = require("./contains")
+  , byLength = require("./_compare-by-length")
+  , filter   = Array.prototype.filter
+  , push     = Array.prototype.push
+  , slice    = Array.prototype.slice;
+
+module.exports = function (/* …list*/) {
+	var lists;
+	if (!arguments.length) slice.call(this);
+	push.apply((lists = [this]), arguments);
+	lists.forEach(value);
+	lists.sort(byLength);
+	return lists.reduce(function (list1, list2) {
+		return filter.call(list1, function (item) { return contains.call(list2, item); });
+	});
+};