From 9d1076b02b333a5026d49ca881967da18ac59bfb Mon Sep 17 00:00:00 2001
From: Aaron Nguyen <me@aaronnguyen.dev>
Date: Wed, 2 Mar 2022 14:58:03 -0500
Subject: [PATCH] Done exercise-1

---
 8-using-inheritance/exercises/exercise-1.js | 26 +++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 8-using-inheritance/exercises/exercise-1.js

diff --git a/8-using-inheritance/exercises/exercise-1.js b/8-using-inheritance/exercises/exercise-1.js
new file mode 100644
index 0000000..97cda3b
--- /dev/null
+++ b/8-using-inheritance/exercises/exercise-1.js
@@ -0,0 +1,26 @@
+"use strict";
+
+class FunctionalSet extends Set {
+  filter(predicate) {
+    return new FunctionalSet([...this].filter(predicate));
+  }
+  map(mapper) {
+    return new FunctionalSet([...this].map(mapper));
+  }
+  reduce(accumulator, identity) {
+    return [...this].reduce(accumulator, identity);
+  }
+}
+
+const set = new FunctionalSet(["Jack", "Jill", "Tom", "Jerry"]);
+
+const jSet = set.filter((name) => name.startsWith("J"));
+const allCaps = set.map((name) => name.toUpperCase());
+
+const totalLengthOfJWords = set
+  .filter((name) => name.startsWith("J"))
+  .reduce((total, word) => total + word.length, 0);
+
+console.log(jSet);
+console.log(allCaps);
+console.log(totalLengthOfJWords);