JavaScript

const person = {
  name: "Alice",
  age: 30,
  city: "New York"
};

const keys = Object.keys(person);
const values = Object.values(person);

const result = keys.map((key, index) => `${key}: ${values[index]}`);

console.log(result);

let arr = [1, 2, 3, 4, 5];
arr.length = 3;
console.log(arr.length);
console.log(arr);

let arr = [1, 2, 3, 4, 5];
arr.length = 3;
arr.push(6, 7);
console.log(arr.length);

const students = [
  { name: 'Alice', age: 20 },
  { name: 'Bob', age: 22 },
  { name: 'Charlie', age: 23 }
];

const studentToFind = { name: 'Bob', age: 22 };

const isIncluded = students.includes(studentToFind);

console.log(isIncluded);

const numbers = [10, 23, 45, 60, 78];
const isDivisibleByFive = numbers.some(num => num % 5 === 0);

if (isDivisibleByFive) {
  console.log('Some numbers are divisible by 5');
} else {
  console.log('No numbers are divisible by 5');
}

const numbers = [2, 4, 6, 8, 10];

const allEven = numbers.every(function(num) {
    return num % 2 === 0;
});

console.log(allEven);