Hands-On Data Structures and Algorithms with JavaScript

Implementing stack methods

Implementing a stack is a rather easy task. We will follow a series of steps, where we will use the ES6 syntax, as follows:

1. Define a constructor:

class Stack {    constructor() {        }}

2. Create a WeakMap() to store the stack items:

const sKey = {};const items = new WeakMap();class Stack {    constructor() {        items.set(sKey, [])    }}

3. Implement the methods described in the preceding API  in the Stack class:

const sKey = {};const items = new WeakMap();class Stack {    constructor() {        items.set(sKey, []);    }    push(element) {        let stack = items.get(sKey);        stack.push(element);    }    pop() {        let stack = items.get(sKey)        return stack.pop()    }    peek() {       let stack = items.get(sKey);       return stack[stack.length - 1];    }    clear() {       items.set(sKey ...