1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
class Dictionary {
  constructor() {
    this.store = new Object();
  }
  add(key, val) {
    this.store[key] = val;
  }
  del(key) {
    delete this.store[key];
  }
  find(key) {
    return this.store[key];
  }
  has(key) {
    return this.store[key] === undefined ? false : true;
  }
  size() {
    return Object.keys(this.store).length;
  }
  toString() {
    const keys = Object.keys(this.store);
    keys.forEach((key) => {
      console.log(`key:${key}:${this.store[key]}`);
    });
  }
}

module.exports = Dictionary;