javascript - 如何找到两个字符串之间的共同单词并返回排序后的单词

Question

我正在尝试解决 Javascript 中的一个困境。我想找到两个字符串之间的共同词。例如，我有下一个字符串 "hello, world", "hello, earth"常用词是"hello"还有"one,two,three", "four,five,one,two,six,three" ==> "one,three,two"

我尝试使用 for 循环，但不是以经典方式，但我遇到了问题，并且打印了错误的结果。

const commonWords = (a, b) => {
  const w = [];

  const first = a.split(",");
  const second = b.split(",");

  for (let c in first) {
    if (second, c.length >= 1) {
      w.push(c);
      w.sort();
    }
  }

  return (w);
};

console.log(commonWords("hello,world", "hello,earth"));

我想了解我的方法是否好或者是否有最好的方法

Answer 1

const commonWords = (a, b) => {
let w;
let first = a.split(",");
let second = b.split(",");
let temp;

if (second.length > first.length) {temp = second; second = first; first = temp;}
w =  first.filter(function (e) {
    return second.indexOf(e) > -1;
});

return w.sort();
};

console.log(commonWords("one,two,three", "four,five,one,two,six,three"));

["one", "three", "two"]