What design pattern is demonstrated in this implementation?
class RateLimiter {
constructor() {
this.throttled = new Map();
this.debounced = new Map();
}
throttle(key, func, limit) {
if (!this.throttled.has(key)) {
this.throttled.set(key, throttle(func, limit));
}
return this.throttled.get(key);
}
debounce(key, func, wait) {
if (!this.debounced.has(key)) {
this.debounced.set(key, debounce(func, wait));
}
return this.debounced.get(key);
}
}
This implementation demonstrates a memoization pattern with rate limiting: 1) It caches throttled and debounced versions of functions, 2) The pattern prevents creating multiple rate-limited versions of the same function, 3) It uses Maps to store and retrieve rate-limited functions by key, 4) This approach is memory-efficient for applications needing multiple rate limiters, 5) The implementation provides a centralized way to manage rate-limited functions, 6) It's particularly useful in large applications with many event handlers, 7) The pattern enables consistent rate limiting across an application, 8) It combines caching with rate limiting for optimal performance.