javascript stack

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Mysterious Macaque answered on March 2, 2021 Popularity 10/10 Helpfulness 4/10

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javascript stack

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class Stack {
    constructor(size) {
        // make properties protected usually prefixed with an underscore _
        this._size = size
        this._stack = []
    }

    isFull() {
        return (this._stack.length === this._size)
    }

    isEmpty() {
        return (this._stack.length === 0)
    }

    push(item) {
        if (!this.isFull()) {
            this._stack.push(item)

            return true
        }

        return false
    }

    pop() {
        if (!this.isEmpty()) {
            const index = this._stack.indexOf(this._stack[this._stack.length - 1])
            if (index > -1) {
                this._stack.splice(index, 1)
            }

            return true
        }

        return false
    }

    peek() {
        if (!this.isEmpty()) {
            return this._stack[this._stack.length - 1]
        }

        return 'empty'
    }

    getStack() {
        return this._stack
    }
}

let stack = new Stack(3)

stack.push(1)
stack.push(2)
stack.push(3)
stack.push(4)
stack.push(5)

console.log('stack:   ', stack.getStack())
console.log('peek:    ', stack.peek())
console.log('is full: ', stack.isFull())
console.log('is empty:', stack.isEmpty(), '\n')

stack.pop()
stack.pop()
stack.pop()

console.log('stack:   ', stack.getStack())
console.log('peek:    ', stack.peek())
console.log('is full: ', stack.isFull())
console.log('is empty:', stack.isEmpty())


// [Log]: 
stack:    [ 1, 2, 3 ]
peek:     3
is full:  true
is empty: false 

stack:    []
peek:     empty
is full:  false
is empty: true

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript stack

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Contributed on Nov 26 2022

Mysterious Macaque

0 Answers Avg Quality 2/10

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javascript stack

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let stack = []
stack.push(2)      	// stack is now [ 2 ]
stack.push(5)      	// stack is now [ 2, 5 ]

let lastElement = stack[stack.length - 1]   // the las element is 5

let i = stack.pop() // stack is now [ 2 ]
console.log(i)      // displays 5


let queue = []
queue.push(2)    		// queue is now [ 2 ]
queue.push(5)        	// queue is now [ 2, 5 ]
let i = queue.shift()	// queue is now [ 5 ]
console.log(i)          // displays 2

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Oct 15 2022

Mysterious Macaque

0 Answers Avg Quality 2/10

stack in javascript

Comments(1)

class Stack{
   constructor() 
    { 
        this.items = []; 
    } 
   
    push(element) 
   { 
    // push element into the items 
    this.items.push(element); 
    }
  
    pop() 
    { 
    if (this.items.length == 0) 
        return "Underflow"; 
    return this.items.pop(); 
    } 
  
    peek() 
	{ 
    	return this.items[this.items.length - 1]; 
	} 
  
    printStack() 
    { 
    	var str = ""; 
    	for (var i = 0; i < this.items.length; i++) 
        	str += this.items[i] + " "; 
    	return str; 
    } 

}

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Mar 02 2021

Mak009

0 Answers Avg Quality 2/10

Stack Example In JavaScript

Comment

class Stack {
  constructor() {
    this.items = [];
  }

  push(item) {
    this.items.unshift(item);
  }

  pop() {
    return this.items.shift();
  }

  peek() {
    return this.items[0];
  }

  isEmpty() {
    return this.items.length === 0;
  }
}


let s =	new Stack();
s.push("one");
s.push("two");
s.push("three");
s.pop("two");
console.log(s);

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jun 21 2022

Javasper

0 Answers Avg Quality 2/10

Stack Implementation in Javascript

Comment

array = []
top = -1

function push(data){
	array[++top] = data
}

function pop(){
	if (top == -1) return "Empty Stack"
	ans = array[top]
	top--
	return ans
}

function peek(){
	if (top == -1) return "Empty Stack"
	return array[top]
}

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: course.masaischool.com

Tags: implementation impl

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Contributed on Jul 27 2022

Lazy Lapwing

0 Answers Avg Quality 2/10

javascript stack

Comment

class Node{
    constructor(value){
        this.value = value;
        this.next = null;
    }
}
class Stack{
    constructor(){
        this.top = null;
        this.bottom = null;
        this.length = 0;
    };
    peek(){
        return this.top;
    };
    push(value){
        const newNode = new Node(value);
        newNode.next = this.top
        this.top = newNode;

        if(this.length === 0) this.bottom = newNode;
        this.length++;
    }
    pop(){
        if(!this.top) return;
        if(this.top === this.bottom){
            this.top = null;
            this.bottom = null;
            this.length--;
            return
        }
        const temp = this.top
        this.top = temp.next
        this.length--;
    }
}

const a = new Stack();

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: www.codegrepper.com

Tags: javascript j

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Contributed on Aug 09 2022

Aditya Pratap Singh

0 Answers Avg Quality 2/10

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