add hw2

node_modules/ramda/es/tryCatch.js

@@ -0,0 +1,41 @@
+import _arity from "./internal/_arity.js";
+import _concat from "./internal/_concat.js";
+import _curry2 from "./internal/_curry2.js";
+/**
+ * `tryCatch` takes two functions, a `tryer` and a `catcher`. The returned
+ * function evaluates the `tryer`; if it does not throw, it simply returns the
+ * result. If the `tryer` *does* throw, the returned function evaluates the
+ * `catcher` function and returns its result. Note that for effective
+ * composition with this function, both the `tryer` and `catcher` functions
+ * must return the same type of results.
+ *
+ * @func
+ * @memberOf R
+ * @since v0.20.0
+ * @category Function
+ * @sig (...x -> a) -> ((e, ...x) -> a) -> (...x -> a)
+ * @param {Function} tryer The function that may throw.
+ * @param {Function} catcher The function that will be evaluated if `tryer` throws.
+ * @return {Function} A new function that will catch exceptions and send them to the catcher.
+ * @example
+ *
+ *      R.tryCatch(R.prop('x'), R.F)({x: true}); //=> true
+ *      R.tryCatch(() => { throw 'foo'}, R.always('caught'))('bar') // =>
+ *      'caught'
+ *      R.tryCatch(R.times(R.identity), R.always([]))('s') // => []
+ *      R.tryCatch(() => { throw 'this is not a valid value'}, (err, value)=>({error : err,  value }))('bar') // => {'error': 'this is not a valid value', 'value': 'bar'}
+ */
+
+var tryCatch =
+/*#__PURE__*/
+_curry2(function _tryCatch(tryer, catcher) {
+  return _arity(tryer.length, function () {
+    try {
+      return tryer.apply(this, arguments);
+    } catch (e) {
+      return catcher.apply(this, _concat([e], arguments));
+    }
+  });
+});
+
+export default tryCatch;