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Typescript Exercises
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
Create a variable with the type number and assign it an arbitrary value
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 2 ------------------
Create a variable with the type string and use the addition operator to put two arbitrary words together
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 3 ------------------
Simulate a Type Error by assigning a number to a string
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 4 ------------------
Create a variable with the type Boolean and assign it to the logical OR operator comparing two values
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 5 ------------------
Simulate a Type Error by assigning a number to a boolean
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 6 ------------------
Get the length of an arbitrary string
*/
SOLUTION:
// Challenge 1 -----------------------------------------------
// let score: number = 19;
//
// Challenge 2 -----------------------------------------------
// let myName: string = "Muslim" + " " + "Helalee";
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 3 -----------------------------------------------
// let size: string = 15
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 4 -----------------------------------------------
// let passed: boolean = true || false;
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 5 -----------------------------------------------
// let failed: boolean = 15
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 6 -----------------------------------------------
// let language: number = "TypeScript".length;
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
What will the following function invocation result in?
*/
// function courseName(): string {
// return "TS";
// }
// let typeScript: "TS" = courseName();
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 2 ------------------
What will accessing the variable favBook result be?
*/
// type BookType =
// | "And the Mountains Echoed"
// | "The Kite Runner"
// | "A Thousand Splendid Suns";
// let favBook: BookType = "The Kite Runner";
// favBook;
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 3 ------------------
What will the following code result in?
*/
// type BookType =
// | "And the Mountains Echoed"
// | "The Kite Runner"
// | "A Thousand Splendid Suns";
// let favBook: BookType = "The Shining";
// favBook;
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 4 ------------------
What will the following variable assignment result in?
*/
// let bool: true = false;
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
What will the following function invocation result in?
*/
// function courseName(): string {
// return "TS";
// }
// let typeScript: "TS" = courseName();
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 2 ------------------
What will accessing the variable favBook result be?
*/
// type BookType =
// | "And the Mountains Echoed"
// | "The Kite Runner"
// | "A Thousand Splendid Suns";
// let favBook: BookType = "The Kite Runner";
// favBook;
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 3 ------------------
What will the following code result in?
*/
// type BookType =
// | "And the Mountains Echoed"
// | "The Kite Runner"
// | "A Thousand Splendid Suns";
// let favBook: BookType = "The Shining";
// favBook;
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 4 ------------------
What will the following variable assignment result in?
*/
// let bool: true = false;
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
Create an object type that has 3 properties (name, age, job) and create an object from this type
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 2 ------------------
Access the published property from the following object using the bracket notation and the dot notation
*/
// type OnlineCourse = {
// name: string;
// platform: string;
// features: string[];
// "meta-data": {
// published: boolean;
// };
// };
// let myCourse: OnlineCourse = {
// name: "TS Bootcamp",
// platform: "Udemy",
// features: ["Practical", "Exercise Oriented", "Modern TS Concepts"],
// "meta-data": {
// published: true,
// },
// };
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 3 ------------------
Fix the error in the following code by modifying the type Product. Do not make changes to the product1 or product2 objects
*/
// type Product = {
// name: string;
// publishedStatus: boolean;
// };
// const product1: Product = { name: "TS Bootcamp" };
// const product2: Product = { name: "TS Bootcamp", publishedStatus: true };
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 4 ------------------
What will the product object log?
*/
// const onlineCourse = { name: "TS Bootcamp", price: 10.99 };
// const product = { ...onlineCourse, released: true };
// console.log(product);
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 5 ------------------
Create a product type and add a holidaySales method that return a string “Sale is On”. Finish by creating an object from the type and logging the string on the console
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
Write a function that takes a literal object with one property of name and simply returns the name
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 2 ------------------
Write a function that takes an object type with one property of online (type boolean) as argument and simply returns the whether the user is online or offline
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
What is the result of the following variable assignment?
*/
/* Do not comment in unless answered
let vague: number | undefined = null
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 2 ------------------
What is the result of the second variable assignment?
*/
/* Do not comment in unless answered
let vague1: boolean | undefined = true ? true : undefined;
let vague2: boolean = vague1;
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 3 ------------------
What is the result of the following variable assignment?
*/
/* Do not comment in unless answered
let vague: string | undefined = undefined;
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 4 ------------------
What is the value of the vague2 variable? Make sure to check for both boolean and undefined values
*/
/* Do not comment in unless answered
let vague1: boolean | undefined = true ? true : undefined;
// let vague1: boolean | undefined = true ? undefined : true;
let vague2: boolean;
if (vague1 === undefined) {
vague2 = false;
} else {
vague2 = true;
}
console.log(vague2);
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 5 ------------------
Create a function that produces a value based on the following conditions
1--------- If the argument passed is a string containing a number, it should return the number
2---------If the argument passed is a string not containing a number, it should return undefined
3---------If the argument passed is undefined, it should return undefined
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
Assign a number to a variable with no type annotation, what is the variable type inferred by TypeScript?
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 2 ------------------
Assign a string to a variable with no type annotation, what is the variable type inferred by TypeScript?
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 3 ------------------
Assign a boolean false to a variable with no type annotation, what is the variable type inferred by TypeScript?
*/
SOLUTION:
// Challenge 1 -----------------------------------------------
// let score = 31 // number
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 2 -----------------------------------------------
// let book = "And the Mountains Echoed" // string
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 3 -----------------------------------------------
// let passed = false // boolean
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
Create an array of numbers
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 2 ------------------
From the previously create array, access the second-indexed item
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 3 ------------------
Create an array of the two boolean values
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
SOLUTION:
// Challenge 1 -----------------------------------------------
// let numbers: number[] = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 2 -----------------------------------------------
// console.log(numbers[2]);
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 3 -----------------------------------------------
// let myArr1: boolean[] = [true, false];
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
Create a string type tuple
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 2 ------------------
Create a number type tuple
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 3 ------------------
Create a string and number type tuple and access the second item
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
SOLUTION:
// Challenge 1 -----------------------------------------------
// let myTuple1: [string] = ["TypeScript"];
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 2 -----------------------------------------------
// let myTuple2: [number] = [35];
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 3 -----------------------------------------------
// let myTuple3: [string, number] = ["false", 35];
// console.log(myTuple3[1]);
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
Create an enum of product names and display it on the console
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 2 ------------------
Create an enum of product ids and display it on the console
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 3 ------------------
Create an enum of a single favorite product detail from the two previously created enums and display it on the console
*/
SOLUTION:
// Challenge 1 -----------------------------------------------
// enum ProductNames {
// product1 = "Laptop",
// product2 = "Mouse",
// product3 = "Keyboard",
// }
// console.log(ProductNames);
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 2 -----------------------------------------------
// enum ProductIds {
// Laptop = 1,
// Mouse,
// Keyboard,
// }
// console.log(ProductIds);
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 3 -----------------------------------------------
// enum FavoriteProduct {
// Name = ProductNames.product1,
// Id = ProductIds.Laptop,
// }
// console.log(
// `My favorite product is ${FavoriteProduct.Name} with an id of ${FavoriteProduct.Id}`
// );
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
Based on the below array of search history of a user, return “Would you like to learn how to create websites for free?” if there is a keyword html or css
*/
let searchHistory: string[] = [
"how to make money online",
"benefits of eating garlic",
"html css tutorial",
"calisthenics",
];
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
SOLUTION:
// Challenge -----------------------------------------------
// Long Version
// for (let searchItem of searchHistory) {
// // console.log(searchItem.split(" "));
// for (let entry of searchItem.split(" ")) {
// // console.log(entry);
// if (entry === "html" || entry === "css")
// console.log("Would you like to learn how to create websites for free?");
// }
// }
// Short version
// searchHistory.map((entry) => {
// if (entry.includes("html") || entry.includes("css"))
// console.log("Would you like to learn how to create websites for free?");
// });
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
Create a function that returns the multiplication of two arbitrary numbers and returns a type error when passed a string
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 2 ------------------
Simulate a type error for the returned value of a function of arbitrary type
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ---------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 3 ------------------
Create an arrow function that returns the addition of a number and a boolean type
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 4 ------------------
Create a function that makes words plural by adding "s"
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 5 ------------------
Write a function that adds or subtracts 1 from a number based on a boolean evaluation. If the boolean is true, it adds 1 otherwise subtracts 1 from the number
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 6 ------------------
Create a function that takes an array of numbers, then returns it. Does not change the array. If a string is passed, it throws a type error
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 7 ------------------
Create a function that takes an array of tuples consisting of two properties, a name and an age. Return the names in a string array
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
SOLUTION:
// Challenge 1 -----------------------------------------------
// function multiplication(num1: number, num2: number): number {
// return num1 * num2;
// }
// const result = multiplication(1, 5);
// const result = multiplication(115, 5);
// const result = multiplication(115, "5");
// console.log(result);
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 2 -----------------------------------------------
// function emailList(email: string): string {
// return email;
// }
// emailList(15);
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 3 -----------------------------------------------
// let add = (num: number, bool: boolean): number => num + bool;
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 4 -----------------------------------------------
// let pluralize = function (str: string): string {
// return str + "s";
// };
// console.log(pluralize("cake"));
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 5 -----------------------------------------------
// Long version
// function decideOperation(num: number, bool: boolean): number {
// if (bool) return num + 1;
// return num - 1;
// }
// Short version
// let decideOperation = (num: number, bool: boolean): number =>
// bool ? num + 1 : num - 1;
// let operationResult = decideOperation(10, true);
// let operationResult = decideOperation(10, false);
// console.log(operationResult);
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 6 -----------------------------------------------
// function myArray(arr: number[]): number[] {
// return arr;
// }
// let result = myArray([1, 2, 3]);
// let result = myArray([1, "2", 3]);
// console.log(result);
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// Challenge 7 -----------------------------------------------
// function getNames(data: [string, number][]): string[] {
// return data.map((name) => name[0]);
// }
// console.log(
// getNames([
// ["John", 35],
// ["Jane", 45],
// ["Jade", 55],
// ])
// );
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
// function productId(): string | number {
// return 112233;
// }
// let id: number = productId();
// id;
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 3 ------------------
What will the function invocation result in?
*/
// function productId(): number {
// return 112233;
// }
// let id: string | number = productId();
// id;
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
What will the function invocation result in?
*/
// function productId(): string | number {
// return 112233;
// }
// let id: string | number = productId();
// id;
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 2 ------------------
What will the function invocation result in?
*/
/* *-*-*-*-*-*-*-*-*-*-* Challenge 1 ------------------
Create a custom type and assign it both boolean values
*/
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 2 ------------------
What will be the value of variable score?
*/
// type Score = number;
// let avgScore: string = "11.5";
// let score: Score = avgScore;
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
/* *-*-*-*-*-*-*-*-*-*-* Challenge 3 ------------------
What will be the value of variable score?
*/
// type Score = number;
// let avgScore: number = 11.5;
// let score: Score = avgScore;
// ----------------------------------------------------
// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
// ----------------------------------------------------
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