We are going to create our own class to represent a stack. Let's start from the basics and declare our class:
function Stack() {
//properties and methods go here
}First, we need a data structure that will store the elements of the stack. We can use an array to do this:
var items = [];
Next, we need to declare the methods available for our stack:
push(element(s)): This adds a new item (or several items) to the top of the stack.pop(): This removes the top item from the stack. It also returns the removed element.peek(): This returns the top element from the stack. The stack is not modified (it does not remove the element; it only returns the element for information purposes).isEmpty(): This returnstrueif the stack does not contain any elements andfalseif the size of the stack is bigger than 0.size(): This returns how many elements the stack contains. It is similar to thelengthproperty of an array.
The first method...