JavaScript Array as a Stack 📚

Veröffentlicht am: 07 Juli 2024
auf dem Kanal: Mayank Srivastava

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hey everyone! Today, I'm going to show you how to use an array as a stack in JavaScript. Let's jump in! A stack is a data structure that follows the Last In, First Out (LIFO) principle. The main methods that a stack object should have are: the push method to insert a new element on top of the stack, the pop method to remove the topmost element and then a method to fetch the value of the topmost element. You can easily implement this using JavaScript arrays. Let's see how! Javascript array objects support the methods push and pop right out of the box. So lets say we have an array named stack which contains numbers and its last element can be considered as the equal of topmost stack element, to add elements to this stack, we can use the push() method. Here, we've pushed 4 and 5 onto the stack. To remove the top element from the stack, use the pop() method. The pop() method removes and returns the last element of the array which is 5 here, again following the LIFO principle. To check the top element without removing it, you can access the last element directly. This returns the same value as the top method. To check if the stack is empty, simply check the array's length. If the length is 0, the stack is empty. And that's how you use an array as a stack in JavaScript!

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