复制
1function findMostWord(article) {
2  // 合法性判断
3  if (!article) return;
4
5  // 参数处理
6  article = article.trim().toLowerCase();
7
8  let wordList = article.match(/[a-z]+/g),
9    visited = [],
10    maxNum = 0,
11    maxWord = "";
12
13  article = " " + wordList.join("  ") + " ";
14
15  // 遍历判断单词出现次数
16  wordList.forEach(function(item) {
17    if (visited.indexOf(item) < 0) {
18      let word = new RegExp(" " + item + " ", "g"),
19        num = article.match(word).length;
20
21      if (num > maxNum) {
22        maxNum = num;
23        maxWord = item;
24      }
25    }
26  });
27
28  return maxWord + "  " + maxNum;
29}