如何查找一篇英文文章中出现频率最高的单词？

function counts(article){ article = article.trim().toUpperCase(); var array = article.match(/[A-z]+/g); article = " "+array.join(" ")+" "; var max = 0,word,num = 0,maxword=""; for(var i = 0; i < array.length; i++) {
word = new RegExp(" "+array[i]+" ",'g'); num = article.match(word).length; if(num>max){ max=num; maxword = array[i]; } } console.log(maxword+" "+max); } counts("Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day;");

function findMostWord(article) { // 合法性判断 if (!article) return;

// 参数处理 article = article.trim().toLowerCase();

let wordList = article.match(/[a-z]+/g), visited = [], maxNum = 0, maxWord = "";

article = " " + wordList.join(" ") + " ";

// 遍历判断单词出现次数 wordList.forEach(function(item) { if (visited.indexOf(item) < 0) { let word = new RegExp(" " + item + " ", "g"), num = article.match(word).length;

  if (num > maxNum) {
    maxNum = num;
    maxWord = item;
  }
}

});