add some packages

node_modules/arr-diff/index.js

@@ -0,0 +1,58 @@
+/*!
+ * arr-diff <https://github.com/jonschlinkert/arr-diff>
+ *
+ * Copyright (c) 2014 Jon Schlinkert, contributors.
+ * Licensed under the MIT License
+ */
+
+'use strict';
+
+var flatten = require('arr-flatten');
+var slice = [].slice;
+
+/**
+ * Return the difference between the first array and
+ * additional arrays.
+ *
+ * ```js
+ * var diff = require('{%= name %}');
+ *
+ * var a = ['a', 'b', 'c', 'd'];
+ * var b = ['b', 'c'];
+ *
+ * console.log(diff(a, b))
+ * //=> ['a', 'd']
+ * ```
+ *
+ * @param  {Array} `a`
+ * @param  {Array} `b`
+ * @return {Array}
+ * @api public
+ */
+
+function diff(arr, arrays) {
+  var argsLen = arguments.length;
+  var len = arr.length, i = -1;
+  var res = [], arrays;
+
+  if (argsLen === 1) {
+    return arr;
+  }
+
+  if (argsLen > 2) {
+    arrays = flatten(slice.call(arguments, 1));
+  }
+
+  while (++i < len) {
+    if (!~arrays.indexOf(arr[i])) {
+      res.push(arr[i]);
+    }
+  }
+  return res;
+}
+
+/**
+ * Expose `diff`
+ */
+
+module.exports = diff;