AlgoDaily - Create Event Emitter

Your Submissions

You haven't submitted any code for this challenge yet. Solve the problem by passing all the test cases, and your submissions will appear here.

xxxxxxxxxx
​
 
class EventEmitter {
    subscriptions = new Map();
​
    subscribe(eventName, callback) {
        if (!this.subscriptions.has(eventName)) {
            this.subscriptions.set(eventName, new Set());
        }
        const subscriptions = this.subscriptions.get(eventName);
        const callbackObj = { callback };
        subscriptions.add(callbackObj);
​
        return {
            release: () => {
                subscriptions.delete(callbackObj);
                if (subscriptions.size === 0) {
                    delete this.subscriptions.eventName;
                }
            },
        };
    }
​
    emit(eventName, ...args) {
        const subscriptions = this.subscriptions.get(eventName);
        if (subscriptions) {
            subscriptions.forEach((cbObj) => {
                cbObj.callback.apply(this, args);
            });

OUTPUT

Results will appear here.