more work

node_modules/lodash/array/xor.js

@@ -0,0 +1,35 @@
+var baseDifference = require('../internal/baseDifference'),
+    baseUniq = require('../internal/baseUniq'),
+    isArguments = require('../lang/isArguments'),
+    isArray = require('../lang/isArray');
+
+/**
+ * Creates an array that is the [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
+ * of the provided arrays.
+ *
+ * @static
+ * @memberOf _
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @returns {Array} Returns the new array of values.
+ * @example
+ *
+ * _.xor([1, 2], [4, 2]);
+ * // => [1, 4]
+ */
+function xor() {
+  var index = -1,
+      length = arguments.length;
+
+  while (++index < length) {
+    var array = arguments[index];
+    if (isArray(array) || isArguments(array)) {
+      var result = result
+        ? baseDifference(result, array).concat(baseDifference(array, result))
+        : array;
+    }
+  }
+  return result ? baseUniq(result) : [];
+}
+
+module.exports = xor;