Here’s a quick JavaScript warmup for solving coding problems

No fluff, just warmup.

Note: This is not all-inclusive, rather than just a brief overview of some key data structures, algorithms, and problem-solving strategies.

Data Structures

//Arrays
const arr = [1, 2, 3];

//Strings
const str = 'Hello, World!';

//HashMaps using Map object
const hashMap = new Map();
hashMap.set('key1', 'value1');
hashMap.set('key2', 'value2');
console.log(hashMap.get('key1')); // Output: 'value1'
console.log(hashMap.has('key3')); // Output: false
hashMap.delete('key1');
for (const [key, value] of hashMap) {
  console.log(`${key}: ${value}`);
}

//HashMaps using generic object
const objHashMap = {
  key1: 'value1',
  key2: 'value2',
};
console.log(objHashMap['key1']); // Output: 'value1'

//Linked Lists
class ListNode {
  constructor(val) {
    this.val = val;
    this.next = null;
  }
}

//Stacks and Queues
const stack = [];
stack.push(1);
stack.pop();
const queue = [];
queue.push(1);
const item = queue.shift();

//Trees
class TreeNode {
  constructor(val) {
    this.val = val;
    this.left = null;
    this.right = null;
  }
}
const root = new TreeNode(1);
root.left = new TreeNode(2);
root.right = new TreeNode(3);

Algorithms

//Binary Search
function binarySearch(arr, target) {
  let left = 0;
  let right = arr.length - 1;
  while (left <= right) {
    const mid = Math.floor((left + right) / 2);
    if (arr[mid] === target) return mid;
    if (target >…