1class TaskQueue {
2    constructor(batchSize = 2) {
3        this.batchSize = batchSize;
4        this.processed = [];
5    }
6
7    async processTasks(tasks) {
8        for (let i = 0; i < tasks.length; i += this.batchSize) {
9            const batch = tasks.slice(i, i + this.batchSize);
10            const results = await Promise.all(
11                batch.map(task => this.processTask(task))
12            );
13            this.processed.push(...results);
14        }
15        return this.processed;
16    }
17
18    async processTask(task) {
19        return `${task}-done`;
20    }
21}
22
23const queue = new TaskQueue(2);
24const tasks = ['A', 'B', 'C'];
25
26queue.processTasks(tasks).then(console.log);