JavaScript Exercises: Remove all the elements from a given stack
JavaScript Stack: Exercise-6 with Solution
Write a JavaScript program to remove all elements from a given stack.
Sample Solution:
JavaScript Code:
class Stack {
constructor() {
this.items = [];
}
push(element) {
this.items.push(element);
}
pop() {
if (this.isEmpty())
return "Underflow";
return this.items.pop();
}
peek() {
if (this.isEmpty())
return "No elements in Stack";
return this.items[this.items.length - 1];
}
isEmpty() {
return this.items.length === 0;
}
clear() {
this.items = [];
}
// Returns the number of elements in the stack
size() {
return this.items.length;
}
displayStack(stack) {
console.log("Stack elements are:");
let str = "";
for (let i = 0; i < stack.items.length; i++)
str += stack.items[i] + " ";
return str.trim();
}
}
console.log("Initialize a stack:")
let stack = new Stack();
console.log("Is the stack empty?");
console.log(stack.isEmpty());
console.log("Input some elements on the stack:")
stack.push(1);
stack.push(4);
stack.push(3);
stack.push(2);
stack.push(5);
stack.push(6);
console.log(stack.displayStack(stack));
console.log("Remove all the elements from the said stack:")
stack.clear();
console.log("Is the stack empty?");
console.log(stack.isEmpty());
Sample Output:
Initialize a stack: Is the stack empty? true Input some elements on the stack: Stack elements are: 1 4 3 2 5 6 Remove all the elements from the said stack: Is the stack empty? true
Flowchart:
Live Demo:
See the Pen javascript-stack-exercise-5 by w3resource (@w3resource) on CodePen.
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Stack Previous: Find the maximum element in a stack (using an array).
Stack Exercises Next: Count all the elements in a given stack.
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