From 692d68d7a413f14224368cd4fdbddae78ecbf52f Mon Sep 17 00:00:00 2001
From: Rodrigo Queiroz <queiroz_rodrigo@outlook.com.br>
Date: Sat, 23 Sep 2023 12:42:51 -0300
Subject: [PATCH] Add new solution to 29.5 without using Pick

---
 ...ick.solution.ts => 29.5-pick.solution1.ts} |  0
 src/06-challenges/29.5-pick.solution2.ts      | 44 +++++++++++++++++++
 2 files changed, 44 insertions(+)
 rename src/06-challenges/{29.5-pick.solution.ts => 29.5-pick.solution1.ts} (100%)
 create mode 100644 src/06-challenges/29.5-pick.solution2.ts

diff --git a/src/06-challenges/29.5-pick.solution.ts b/src/06-challenges/29.5-pick.solution1.ts
similarity index 100%
rename from src/06-challenges/29.5-pick.solution.ts
rename to src/06-challenges/29.5-pick.solution1.ts
diff --git a/src/06-challenges/29.5-pick.solution2.ts b/src/06-challenges/29.5-pick.solution2.ts
new file mode 100644
index 0000000..2bf164b
--- /dev/null
+++ b/src/06-challenges/29.5-pick.solution2.ts
@@ -0,0 +1,44 @@
+import { expect, it } from "vitest";
+import { Equal, Expect } from "../helpers/type-utils";
+
+const pick = <TObj, TPicked extends keyof TObj>(
+  obj: TObj,
+  picked: Array<TPicked>
+) => {
+  return picked.reduce((acc, key) => {
+    acc[key] = obj[key];
+    return acc;
+  }, {} as {[PickedKey in TPicked]: TObj[PickedKey]});
+};
+
+it("Should pick the keys from the object", () => {
+  const result = pick(
+    {
+      a: 1,
+      b: 2,
+      c: 3,
+      d: true
+    },
+    ["a", "b", "d"]
+  );
+
+  expect(result).toEqual({ a: 1, b: 2 });
+
+  type test = Expect<Equal<typeof result, { a: number; b: number, d: boolean }>>;
+});
+
+it("Should not allow you to pass keys which do not exist in the object", () => {
+  pick(
+    {
+      a: 1,
+      b: 2,
+      c: 3,
+    },
+    [
+      "a",
+      "b",
+      // @ts-expect-error
+      "d",
+    ]
+  );
+});