general-set.js

class GeneralSet {
  map = new Map();

  constructor(a = []) {
    this[Symbol.iterator] = this.values;
    if (a) a.forEach(_ => this.add(_));
  }

  add(el) {
    this.map.set(el.toIdString(), el);
  }

  has(el) {
    return this.map.has(el.toIdString());
  }

  values() {
    return this.map.values();
  }

  delete(el) {
    return this.map.delete(el.toIdString());
  }
}