--- /dev/null
+/*!
+ * arr-diff <https://github.com/jonschlinkert/arr-diff>
+ *
+ * Copyright (c) 2014-2017, Jon Schlinkert.
+ * Released under the MIT License.
+ */
+
+'use strict';
+
+module.exports = function diff(arr/*, arrays*/) {
+ var len = arguments.length;
+ var idx = 0;
+ while (++idx < len) {
+ arr = diffArray(arr, arguments[idx]);
+ }
+ return arr;
+};
+
+function diffArray(one, two) {
+ if (!Array.isArray(two)) {
+ return one.slice();
+ }
+
+ var tlen = two.length
+ var olen = one.length;
+ var idx = -1;
+ var arr = [];
+
+ while (++idx < olen) {
+ var ele = one[idx];
+
+ var hasEle = false;
+ for (var i = 0; i < tlen; i++) {
+ var val = two[i];
+
+ if (ele === val) {
+ hasEle = true;
+ break;
+ }
+ }
+
+ if (hasEle === false) {
+ arr.push(ele);
+ }
+ }
+ return arr;
+}