di-tory/esm/stack/Stack.js

Compose applications with dependency injection

import { StackError, StackErrorType } from './StackError.js';
export class Stack {
    constructor(items = [], set = new Set()) {
        this.items = items;
        this.set = set;
    }
    push(item) {
        if (this.set.has(item))
            throw new StackError(StackErrorType.Exists);
        this.items.push(item);
        this.set.add(item);
    }
    pop() {
        const item = this.items.pop();
        if (item == null)
            throw new StackError(StackErrorType.Empty);
        this.set.delete(item);
        return item;
    }
    peek() {
        return this.items.at(-1);
    }
    toStringArray() {
        return this.items.map(String);
    }
    get length() {
        return this.items.length;
    }
}