completed solutions to 9

Author: kylenoad

src/04-optional-params.problem.ts

@@ -1,6 +1,6 @@
 import { expect, it } from "vitest";
 
-export const getName = (first: string, last: string) => {
+export const getName = (first: string, last?: string) => {
   if (last) {
     return `${first} ${last}`;
   }

src/05-assigning-types-to-variables.problem.ts

@@ -11,7 +11,13 @@ interface User {
  * How do we ensure that defaultUser is of type User
  * at THIS LINE - not further down in the code?
  */
-const defaultUser = {};
+const defaultUser: User = {
+  id: 1,
+  firstName: "Kyle",
+  lastName: "Noad",
+  isAdmin: true
+
+};
 
 const getUserId = (user: User) => {
   return user.id;

src/06-unions.problem.ts

@@ -8,7 +8,7 @@ interface User {
    * - 'user'
    * - 'super-admin'
    */
-  role: string;
+  role: 'admin' | 'user' | 'super-admin';
 }
 
 export const defaultUser: User = {

src/07-arrays.problem.ts

@@ -3,7 +3,7 @@ interface User {
   firstName: string;
   lastName: string;
   role: "admin" | "user" | "super-admin";
-  posts: Post;
+  posts: Post[];
 }
 
 interface Post {

src/08-function-return-type-annotations.problem.ts

@@ -17,8 +17,14 @@ interface Post {
  * How do we ensure that makeUser ALWAYS
  * returns a user?
  */
-const makeUser = () => {
-  return {};
+const makeUser = (): User => {
+  return {
+    id: 1,
+    firstName: "Kyle",
+    lastName: "Noad",
+    role: "super-admin",
+    posts: [{id: 1, title: "hello"}]
+  };
 };
 
 it("Should return a valid user", () => {

src/09-promises.problem.ts

@@ -9,7 +9,7 @@ interface LukeSkywalker {
   gender: string;
 }
 
-export const fetchLukeSkywalker = async (): LukeSkywalker => {
+export const fetchLukeSkywalker = async (): Promise<LukeSkywalker> => {
   const data = await fetch("https://swapi.py4e.com/api/people/1").then(
     (res) => {
       return res.json();