45-Qs-assignment.ts

"use strict";
//1:Personal Message: Store a person’s name in a variable, and print a message to that person.
// Your message should be simple, such as, “Hello Eric, would you like to learn some Python today?”
var personName = "seerathanif"; //variable declaration
console.log("Hello " + personName + ", would you like to learn some Python today?");
//2:Name Cases: Store a person’s name in a variable, and then print that person’s name
// in lowercase, uppercase, and titlecase.
let myName = "seerathanif"; //variable assignment
myName = myName.toLowerCase(); //lowercase      
console.log(myName);
myName = myName.toUpperCase(); //uppercase	  
console.log(myName);
myName = myName[0].toUpperCase() + myName.slice(1).toLowerCase();
console.log(myName);
//3:Famous Quote: Find a quote from a famous person you admire. Print the quote and the name of
// its author. Your output should look something like the following, including the quotation marks:
//Albert Einstein once said, “A person who never made a mistake never tried anything new."
const einsteinQuote = "A person who never makes a mistake never tries anything new.";
const einsteinAuthor = "AlbertEinstein";
console.log(`"${einsteinQuote}" - ${einsteinAuthor}`);
//4:Famous Quote 2: Repeat Exercise 3, but this time store the famous person’s name in a variable 
//called famous_person. Then compose your message and store it in a new variable called message.
// Print your message.
const famousPerson = "AlbertEinstein";
const message = `${famousPerson} once said,"A person who never makes a mistake never tries anything new."`;
console.log(`${message}`);
//5:Stripping Names: Store a person’s name, and include some whitespace characters at the beginning 
//and end of the name. Make sure you use each character combination, "\t" and "\n", at least once.
// Print the name once, so the whitespace around the name is displayed.
// Then print the name after striping the white spaces.
myName = "\t   SEERAT HANIF\n"; //first print name with white-space
console.log("print name with whitespace:");
console.log(myName);
// Strip the whitespace and print the name again.
var stripped_myName = myName.trim();
console.log("print name after stripping whitespace:");
console.log(stripped_myName);
//6:Number Eight: Write addition, subtraction, multiplication, and division operations that each 
//result in the number 8. Be sure to enclose your operations in print statements to see the results.
var addition = 4 + 4; //print result in number 8 by addition 
console.log(`addition of two numbers is:${addition}`);
var subtraction = 15 - 7; //print result in number 8 by subtraction
console.log("subtraction of two numbers:" + subtraction);
var multiplication = 4 * 2; //print result in number 8 by multiplication
console.log("multiplication of two numbers:" + multiplication);
var division = 16 / 2; //print result in number 8 by division
console.log("division of two numbers :" + division);
//7:You should create four lines that look like this:
//console.log(5 + 3)
//Your output should simply be four lines with the number 8 appearing once on each line.
for (let i = 0; i < 4; i++) {
    console.log(8);
}
//8:Favorite Number: Store your favorite number in a variable. Then, using that variable,
// create a message that reveals your favorite number. Print that message.
var favoriteNum = 28; //store my fav num as variable
var favoriteMessage = `My Favorite Num Is ${favoriteNum}`; //compose msg for printing
console.log(favoriteMessage); //print msg
//9:Adding Comments: Choose two of the programs you’ve written, and add at least one comment to each.
//If you don’t have anything specific to write because your programs are too simple at this point,
// just add your name and the current date at the top of each program file.
// Then write one sentence describing what the program does.
/*
* Program Name: helloWorld.ts;
* Author : seerat hanif;
* Date Created: 12/10/2021;
*/
function sayHello() {
    console.log('hello world');
}
sayHello();
//10:Names: Store the names of a few of your friends in a array called names. Print each person’s
// name by accessing each element in the list, one at a time.
const names = ["Faiza", "Zuha", "Fatima"]; //create an array named "names".
function printArrayNames() {
    for (let index = 0; index < names.length; index++) {
        console.log(`friend=${names[index]}`); //print all elements of array
    }
}
;
printArrayNames(); //call above defined function
//11:Greetings: Start with the array you used in Exercise 10, but instead of just printing each
// person’s name, print a message to them. The text of each message should be the same,
// but each message should be personalized with the person’s name.
/*
const greeting="Hello";           //declare string constant
*/
var greeting = "Hi"; //change value of declared const
function printPersonalizedGreeting() {
    for (var index = 0; index < names.length; index++) {
        console.log(`${greeting} ${names[index]}!`); //print personalized greeting for every friend
    }
}
;
printPersonalizedGreeting();
//12:Your Own Array: Think of your favorite mode of transportation, such as a motorcycle or a
// car, and make a list that stores several examples. Use your list to print a series of
// statements about these items, such as “I would like to own a Honda motorcycle.”
var motorCycles = ["Honda", "Yamaha", "Kawasaki", "Suzuki"];
motorCycles.forEach((value) => {
    if ((value == "Honda") || (value == 'Yamaha') || (value == 'Kawasaki') || (value == 'Suzuki')) { //check if any of the values match
        console.log("I would love to buy " + value + "!"); //if yes then print statement
    }
});
//13:Guest List: If you could invite anyone, living or deceased, to dinner, who would you invite?
// Make a list that includes at least three people you’d like to invite to dinner.
// Then use your list to print a message to each person, inviting them to dinner.
var guestList = ["Iqra", "Farwa", "Uswa"]; //create new array containing names
guestList.forEach((element) => {
    console.log(`Welcome to my party ${element}!`); //print welcome message
});
//14:Changing Guest List: You just heard that one of your guests can’t make the dinner, so you 
//need to send out a new set of invitations. You’ll have to think of someone else to invite.
// Update your program from Exercises 9-12 using this information to rearrange your guest lists.
var guestList = [("Faiza"), ("Noor")]; //reassigning content of existing array
console.log('New Invitation'); //printing new invitation
for (let i = 0; i <= guestList.length - 1; i++) { //loop through contents of array
    console.log(`${guestList[i][0]}, I hope you'll come.`); //print updated invitation
}
;
//.Start with your program from Exercise 13. Add a print statement at the end of your program
// stating the name of the guest who can’t make it.
guestList = ['Nora']; //reassigning content of existing array
console.log(`Sorry ${guestList}, we're having trouble finding another table.`); //print error message
//Modify your list, replacing the name of the guest who can’t make it with the name
// of the new person you are inviting.
guestList = ['bushra', 'habiba', 'azra']; //modifying array by adding more elements in it
console.log('Invitation sent!'); //print success message
//Print a second set of invitation messages, one for each person who is still in your list.
guestList.forEach((name) => {
    console.log("Hello " + `${name}` + ", I'm sorry but I couldn't find any other tables.");
});
//15:More Guests: You just found a bigger dinner table, so now more space is available. 
//Think of three more guests to invite to dinner.
//• Start with your program from Exercise 15. Add a print statement to the end of your program 
//informing people that you found a bigger dinner table.
// • Add one new guest to the beginning of your array.
// • Add one new guest to the middle of your array.
//  • Use append() to add one new guest to the end of your list. 
// • Print a new set of invitation messages, one for each person in your list.
guestList.unshift('Ahmad'); //adding element into front of an array
console.log(`${guestList} has been added as first member`); //printing success message
guestList.splice(Math.floor(guestList.length / 2), 0, 'Mohammad'); //inserting element between two
console.log(`${guestList} has been inserted between two members`); //printing success message
guestList.push('Rahman'); //adding element after last element inside array
console.log(`${guestList} has been added as last member`); //printing success message
guestList.forEach((name) => {
    console.log(`Hi ${name},I am happy to see you again!`);
}); //printing success message
//16:Shrinking Guest List: You just found out that your new dinner table won’t arrive in time
// for the dinner, and you have space for only two guests.
//• Modify your program from Exercise 15 to remove the last two names from your list, then print
//a third set of invitation messages, one for each remaining person on your list.
guestList = ['Ahmed', "Ali", "<NAME>", '<NAME>', 'Habib', 'Zaid',]; //updating array
const removedGuests = guestList.pop(); //remove last item from array
removedGuests; //displaying deleted value
console.log(`${removedGuests} has left us...`); //printing success message
guestList.shift(); //delete first element form array
console.log("The hostess will be waiting for you!"); //printing success message
guestList; //displaying current state of array
//• Remove guests from your list one at a time until only two names remain in your list. 
//Each time you pop a name from your list, print a message to that person 
//letting them know you’re sorry you can’t invite them to dinner.
while (guestList.length > 3) //checking if length greater than or equal to 4
 { //if true loop continues otherwise break
    const removedGuest = guestList.pop(); //remove last item from array
    console.log(`${removedGuest} Sorry ,we don't have enough room right now.. `);
}
//• Print a message to each of the two people still on your list, letting them 
//know they’re still invited. 
var guestList = ['iram', 'iqra', 'noor', 'muskan'];
for (let i = 0; i < guestList.length; i++) { //loop till index reaches its limit
    console.log(`We are still looking for another ${guestList[i]} .`);
} //end of loop
//• Remove the last two names from your list, so you have an empty list. Print your list to
// make sure you actually have an empty list at the end of your program.
guestList = []; //emptying array
console.log("Our party is over"); //printing success message
//17:Seeing the World: Think of at least five places in the world you’d like to visit.
/*• Store the locations in a array. Make sure the array is not in alphabetical order.
• Print your array in its original order.
• Print your array in alphabetical order without modifying the actual list.
• Show that your array is still in its original order by printing it.
• Print your array in reverse alphabetical order without changing the order of the original list.
• Show that your array is still in its original order by printing it again.
• Reverse the order of your list. Print the array to show that its order has changed.
• Reverse the order of your list again. Print the list to show it’s back to its original order.
• Sort your array so it’s stored in alphabetical order. Print the array to show that its order has been changed.
• Sort to change your array so it’s stored in reverse alphabetical order. Print the list to show that its order has changed.*/
let b = 5;
let a = 10;
function sortArray(arr) {
    function sortDescending(arr) {
        return arr.sort((a, b) => b - a); // Sorting array in descending order
    }
    // Example usage:
    const myArray = [5, 2, 9, 1, 5, 6];
    const sortedArray = sortDescending(myArray);
    console.log(sortedArray); // This will print the sorted array in descending order
}
;
const countries = ['India', 'China', 'United States', 'Indonesia', 'Brazil'];
const myArr = ['Mumbai', 'Delhi', 'Kolkata', 'Bangalore'];
// Sorting myArr in alphabetical order
const sortedArr = [...myArr].sort((a, b) => a.localeCompare(b));
// Reversing the sortedArr to create new arrays
const reversedSortedArr1 = [...sortedArr].reverse();
const reversedSortedArr2 = [...sortedArr].reverse();
// Creating a copy of the initial array
const unsortedArr = [...myArr];
// Sorting the unsortedArr and creating a new array
const reversedSortedArr3 = [...unsortedArr].sort((a, b) => b.localeCompare(a));
// Reversing the sortedArr in place
sortedArr.reverse();
const reversedSortedArr4 = [...sortedArr];
//unsorted array
const reversedUnsortedArr5 = unsortedArr.reverse();
console.log('Reversed Copy Of Original Array:', reversedUnsortedArr5);
console.log(sortedArr); // Sorted in alphabetical order
console.log(reversedSortedArr1); // Reversed copy of sortedArr
console.log(reversedSortedArr2); // Another reversed copy of sortedArr
console.log(reversedSortedArr3); // Sorted in reverse alphabetical order
console.log(reversedSortedArr4); // Reversed original sortedArr
//18:Seeing the World: Think of at least five places in the world you’d like to visit.
//• Store the locations in a array. Make sure the array is not in alphabetical order.
//• Print your array in its original order.
//• Print your array in alphabetical order without modifying the actual list. 
//• Show that your array is still in its original order by printing it.
/*
• Print your array in reverse alphabetical order without changing the order of the original list.
• Show that your array is still in its original order by printing it again.
• Reverse the order of your list. Print the array to show that its order has changed.
• Reverse the order of your list again. Print the list to show it’s back to its original order.
• Sort your array so it’s stored in alphabetical order. Print the array to show that its order has been changed.
• Sort to change your array so it’s stored in reverse alphabetical order.
 Print the list to show that its order has changed.*/
function seeTheWorld() {
    let arr = ["New York", "America", "Europe", "China", "SaudiArab"];
    let sortedArr = [];
    let revSortedArray = [];
    let printOriginalOrder = () => {
        for (let i = 0; i < arr.length; i++) {
            console.log(`My Favourite City Is ${arr[i]}`);
        }
    };
    printOriginalOrder();
    function sortAlphabetically() {
        for (let j = 0; j < arr.length - 1; j++) {
            if ((arr[j] < arr[j + 1])) {
                const temp = arr[j + 1];
                arr[j + 1] = arr[j];
            }
            else
                break;
        }
    }
    printOriginalOrder();
}
seeTheWorld();
//19:Think of something you could store in a array. For example, you could make a list of
//mountains, rivers, countries, cities, languages, or anything else you’d like.
//Write a program that creates a list containing these items.
function thinkOfSomethingToStoreInAnArray() {
    var cities = ["Faisalabad", "Lahore", "Islamabad"];
    var countries = ["Pakistan", "America", "Italy"];
    var mountains = ["Alps", "Tibetan Plateau", "Machu Picchu", "Kilimanjaro"];
    console.log("list of different items:", (cities), (countries), (mountains));
}
thinkOfSomethingToStoreInAnArray();
const seeratHanif = {
    name: "Seerat Hanif",
    age: 18,
    address: "Faisalabad",
};
const iqraHanif = {
    name: "Iqra Hanif",
    age: 32,
    address: "Italy(Milan)",
};
console.log(seeratHanif);
console.log(iqraHanif);
//21:Intentional Error: If you haven’t received an array index error in one of your programs
//yet, try to make one happen.Change an index in one of your programs to produce an index error.
//Make sure you correct the error before closing the program.....
var myArray = [5, "hello", "world"]; //this is not allowed
myArray[3] = "seerat";
console.log(myArray);
//22:Conditional Tests: Write a series of conditional tests. Print a statement describing each
// test and your prediction for the results of each test.
//Your code should look something like this:
/*
let car = 'subaru';

console.log("Is car == 'subaru'? I predict True.")

console.log(car == 'subaru')*/
//• Look closely at your results, and make sure you understand why each
//line evaluates to True or False
//• Create at least 10 tests. Have at least 5 tests evaluate to True and 
//another 5 tests evaluate to False.
let num1 = 10;
let num2 = 5;
let str1 = 'hello';
let str2 = 'world';
let bool1 = true;
let bool2 = false;
// Test 1: Check if num1 is greater than num2
console.log("Is num1 > num2? I predict True.");
console.log(num1 > num2);
// Test 2: Check if str1 is equal to str2
console.log("Is str1 == str2? I predict False.");
console.log(str1 == str2);
// Test 3: Check if num1 is less than or equal to num2
console.log("Is num1 <= num2? I predict False.");
console.log(num1 <= num2);
// Test 4: Check if str1 is not equal to str2
console.log("Is str1 != str2? I predict True.");
console.log(str1 != str2);
// Test 5: Check if bool1 is equal to true
console.log("Is bool1 == true? I predict True.");
console.log(bool1 == true);
// Test 6: Check if bool2 is equal to true
console.log("Is bool2 == true? I predict False.");
console.log(bool2 != false);
// Test 7: Check if num1 plus num2 is equal to 15
console.log("Is num1 + num2 == 15? I predict True.");
console.log(num1 + num2 == 15);
// Test 8: Check if str1 concatenated with str2 is equal to 'helloworld'
console.log("Is str1 + str2 != 'helloworld'? I predict FALSE.");
console.log(str1 + str2 != 'helloworld');
// Test 9: Check if bool1 OR bool2 is true
console.log("Is bool1 || bool2? I predict True.");
console.log(bool1 || bool2);
// Test 10: Check if num1 is equal to 10 AND str1 is equal to 'hello'
console.log("Is num1 == 10 && str1 == 'hello'? I predict True.");
console.log(num1 != 10 && str1 == 'hello');