add hw2

node_modules/ramda/es/symmetricDifferenceWith.js

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+import _curry3 from "./internal/_curry3.js";
+import concat from "./concat.js";
+import differenceWith from "./differenceWith.js";
+/**
+ * Finds the set (i.e. no duplicates) of all elements contained in the first or
+ * second list, but not both. Duplication is determined according to the value
+ * returned by applying the supplied predicate to two list elements.
+ *
+ * @func
+ * @memberOf R
+ * @since v0.19.0
+ * @category Relation
+ * @sig ((a, a) -> Boolean) -> [a] -> [a] -> [a]
+ * @param {Function} pred A predicate used to test whether two items are equal.
+ * @param {Array} list1 The first list.
+ * @param {Array} list2 The second list.
+ * @return {Array} The elements in `list1` or `list2`, but not both.
+ * @see R.symmetricDifference, R.difference, R.differenceWith
+ * @example
+ *
+ *      const eqA = R.eqBy(R.prop('a'));
+ *      const l1 = [{a: 1}, {a: 2}, {a: 3}, {a: 4}];
+ *      const l2 = [{a: 3}, {a: 4}, {a: 5}, {a: 6}];
+ *      R.symmetricDifferenceWith(eqA, l1, l2); //=> [{a: 1}, {a: 2}, {a: 5}, {a: 6}]
+ */
+
+var symmetricDifferenceWith =
+/*#__PURE__*/
+_curry3(function symmetricDifferenceWith(pred, list1, list2) {
+  return concat(differenceWith(pred, list1, list2), differenceWith(pred, list2, list1));
+});
+
+export default symmetricDifferenceWith;