add hw2

node_modules/ramda/es/sequence.js

@@ -0,0 +1,39 @@
+import _curry2 from "./internal/_curry2.js";
+import ap from "./ap.js";
+import map from "./map.js";
+import prepend from "./prepend.js";
+import reduceRight from "./reduceRight.js";
+/**
+ * Transforms a [Traversable](https://github.com/fantasyland/fantasy-land#traversable)
+ * of [Applicative](https://github.com/fantasyland/fantasy-land#applicative) into an
+ * Applicative of Traversable.
+ *
+ * Dispatches to the `sequence` method of the second argument, if present.
+ *
+ * @func
+ * @memberOf R
+ * @since v0.19.0
+ * @category List
+ * @sig (Applicative f, Traversable t) => (a -> f a) -> t (f a) -> f (t a)
+ * @param {Function} of
+ * @param {*} traversable
+ * @return {*}
+ * @see R.traverse
+ * @example
+ *
+ *      R.sequence(Maybe.of, [Just(1), Just(2), Just(3)]);   //=> Just([1, 2, 3])
+ *      R.sequence(Maybe.of, [Just(1), Just(2), Nothing()]); //=> Nothing()
+ *
+ *      R.sequence(R.of, Just([1, 2, 3])); //=> [Just(1), Just(2), Just(3)]
+ *      R.sequence(R.of, Nothing());       //=> [Nothing()]
+ */
+
+var sequence =
+/*#__PURE__*/
+_curry2(function sequence(of, traversable) {
+  return typeof traversable.sequence === 'function' ? traversable.sequence(of) : reduceRight(function (x, acc) {
+    return ap(map(prepend, x), acc);
+  }, of([]), traversable);
+});
+
+export default sequence;