import {Monster, Base} from './base.js';
/**
* you can call the method via the monster namespace `new Monster.Types.Queue()`.
*
* ```
* <script type="module">
* import {Monster} from 'https://cdn.jsdelivr.net/npm/@schukai/monster@1.6.0/dist/modules/types/stack.js';
* console.log(new Monster.Types.Stack())
* </script>
* ```
*
* Alternatively, you can also integrate this function individually.
*
* ```
* <script type="module">
* import {ID} from 'https://cdn.jsdelivr.net/npm/@schukai/monster@1.6.0/dist/modules/types/stack.js';
* console.log(new Stack())
* </script>
* ```
*
* @since 1.4.0
* @copyright schukai GmbH
* @memberOf Monster/Types
*/
class Stack extends Base {
/**
*
*/
constructor() {
super();
this.data = [];
}
/**
* @return {boolean}
*/
isEmpty() {
return this.data.length === 0;
}
/**
* looks at the object at the top of this stack without removing it from the stack.
*
* @return {*}
*/
peek() {
if (this.isEmpty()) {
return undefined;
}
return this.data?.[this.data.length - 1];
}
/**
* pushes an item onto the top of this stack.
*
* @param {*} value
* @returns {Queue}
*/
push(value) {
this.data.push(value)
return this;
}
/**
* remove all entries
*
* @returns {Queue}
*/
clear() {
this.data = [];
return this;
}
/**
* removes the object at the top of this stack and returns
* that object as the value of this function. is the stack empty
* the return value is undefined.
*
* @return {*}
*/
pop() {
if (this.isEmpty()) {
return undefined;
}
return this.data.pop();
}
}
Monster.assignToNamespace('Monster.Types', Stack);
export {Monster, Stack}