JAVASCRIPT LRUCache.js

function _defineProperty(e, r, t) { return (r = _toPropertyKey(r)) in e ? Object.defineProperty(e, r, { value: t, enumerable: !0, configurable: !0, writable: !0 }) : e[r] = t, e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == typeof i ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != typeof t || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != typeof i) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
/**
 * Simple LRU (Least Recently Used) cache implementation
 */
export class LRUCache {
  constructor(maxSize) {
    _defineProperty(this, "cache", new Map());
    this.maxSize = maxSize;
  }
  get(key) {
    var value = this.cache.get(key);
    if (value !== undefined) {
      this.cache.delete(key);
      this.cache.set(key, value);
    }
    return value;
  }
  set(key, value) {
    if (this.cache.has(key)) {
      this.cache.delete(key);
    } else if (this.cache.size >= this.maxSize) {
      var firstKey = this.cache.keys().next().value;
      if (firstKey != null) {
        this.cache.delete(firstKey);
      }
    }
    this.cache.set(key, value);
  }
  clear() {
    this.cache.clear();
  }
  size() {
    return this.cache.size;
  }
}