Method set

lib/host.js:558–578

* Adds a new item to the map. * @param {String} key The key of the host * @param {Host} value The host to be added * @fires HostMap#remove * @fires HostMap#add

(key, value)

   * @fires HostMap#add
   */
  set(key, value) {
    // Clear values cache
    this._values = null;

    const originalValue = this._items.get(key);
    if (originalValue) {
      //The internal structure does not change
      this._items.set(key, value);
      //emit a remove followed by a add
      this.emit('remove', originalValue);
      this.emit('add', value);
      return;
    }

    // Copy the values
    const copy = new Map(this._items);
    copy.set(key, value);
    this._items = copy;
    this.emit('add', value);
    return value;
  }

  /**
   * Returns a shallow copy of a portion of the items into a new array object.