eshaanmathur

/**
 * @param {number[]} arr
 * @return {number}
 */
var findLucky = function(arr) {
   const countMap = arr.reduce((acc, number) => {
		const current = acc.get(number) ||  0;
			acc.set(number, current + 1); 
			return acc;
	 }, new Map());

eshaanmathur

/**
 * @param {number[]} nums
 * @return {void} Do not return anything, modify nums in-place instead.
 */

// see the `compareFn` https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort
function moveZeroes(nums) {
  // you can pass a function to sort customising how we sort
	nums.sort((a, z) => {
    // if a is 0 we tell sort to sort a after z

eshaanmathur

const user = {
	name: 'Eshaan Mathur',
	age: 33,
	isAwesome: true,
};

const feilds = (Object.keys(user) as (keyof typeof user)[]).map((key) => [key, user[key]]);

console.log(feilds);

eshaanmathur

function sleep(ms:number) {
	return new Promise(resolve => setTimeout(resolve, ms))
}

eshaanmathur

const arr1 = [
  ['name', 'id', 'age', 'weight', 'cool'],
  ['Susan', '3', '20', '120', true],
  ['John', '1', '21', '150', true],
  ['Bob', '2', '23', '90', false],
  ['Ben', '4', '20', '100', true],
];

const arr2 = [
  ['name', 'id', 'height'],