SOURCE

const WordDictionary = function () {
    this.words = {};
}

// WordDictionary.prototype.addWord = (word) => {
//     const that = this;
//     if (!word) {
//         return false;
//     }
//     if (that.words && that.words[word.length]) {
//         that.words[word.length].push(word);
//     } else {
//         console.log('====', that.words);
//         that.words[word.length] = [word];
//     }
// }

WordDictionary.prototype.addWord = function (word) {
  // 若该字符串对应长度的数组已经存在，则只做添加
  console.log(this.words);
  if (this.words[word.length]) {
    this.words[word.length].push(word)
  } else {
    // 若该字符串对应长度的数组还不存在，则先创建
    this.words[word.length] = [word]
  }

};

WordDictionary.prototype.searchWord = (word) => {
    if (!this.words[word.length]) {
        return false;
    }
    
    if (!word.includes('.')) {
        return this.words[word.length].includes(word);
    }

    const reg = new RegExp(word);

    return this.words[word.length].some((i) => {
        return reg.test(i);
    })
}

// WordDictionary.prototype.addWord('231');
WordDictionary.prototype.addWord('6783');
console.log(WordDictionary.prototype.words)