Stack
Initialize the stack
You can create a stack with the given size. Size is optional argument with the default value 65535.
import { Stack } from "quark-dsa";
const stack = new Stack(200); // Creates stack with size 200.Supported methods
| Method | Description | Returns |
|---|---|---|
push(item) | Pushes the item onto the top of the stack. | void |
pop() | Removes the item at the top this stack and returns it. | popped item |
isEmpty() | Checks if the stack is empty | true if stack is empty otherwise false |
peek() | Returns the top item from the stack without removing it | top element of the stack |
length() | Returns the length of the stack. Length is different than size. Size is the maximum limit of the stack, while length is the count of items in the stack. | length of the stack |
search(item) | Returns the 0-based position of the item in the stack. | returns the position of the item in the stack. If item is absent, it will return -1 |
Usage
import { Stack } from "quark-dsa";
const stack = new Stack(); // new stack is created.
stack.push(23); // pushes 23 to the top of the stack.
stack.push(36); // pushes 36 to the top of the stack.
stack.length(); // returns 2;
stack.search(36); // returns 1;
stack.search(98); // returns -1;
stack.pop(); // removes top element from the stack and returns it.
stack.peek(); // returns the top element of the stack, 23.
stack.length(); // returns 1;
stack.pop(); // removes top element from the stack and returns it.
stack.isEmpty(); // returns true as stack is empty now.