Class

Cache/LFUCache.js:12–12

// This frequency map class will act like javascript Map DS with more two custom method refresh & insert
class FrequencyMap extends Map {
  static get [Symbol.species]() {
    return Map
  } // for using Symbol.species we can access Map constructor  @see -> https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/@@species