more work

node_modules/lodash/array/difference.js

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+var baseDifference = require('../internal/baseDifference'),
+    baseFlatten = require('../internal/baseFlatten'),
+    isArguments = require('../lang/isArguments'),
+    isArray = require('../lang/isArray'),
+    restParam = require('../function/restParam');
+
+/**
+ * Creates an array excluding all values of the provided arrays using
+ * `SameValueZero` for equality comparisons.
+ *
+ * **Note:** [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+ * comparisons are like strict equality comparisons, e.g. `===`, except that
+ * `NaN` matches `NaN`.
+ *
+ * @static
+ * @memberOf _
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {...Array} [values] The arrays of values to exclude.
+ * @returns {Array} Returns the new array of filtered values.
+ * @example
+ *
+ * _.difference([1, 2, 3], [4, 2]);
+ * // => [1, 3]
+ */
+var difference = restParam(function(array, values) {
+  return (isArray(array) || isArguments(array))
+    ? baseDifference(array, baseFlatten(values, false, true))
+    : [];
+});
+
+module.exports = difference;