leetcode-1078.Bigram 分词

发表于:2021-12-26 16:47
技术,算法,leetcode
热度:137
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给出第一个词 first 和第二个词 second,考虑在某些文本 text 中可能以 "first second third" 形式出现的情况,其中 second 紧随 first 出现,third 紧随 second 出现。

对于每种这样的情况,将第三个词 "third" 添加到答案中,并返回答案。

示例 1:

输入:text = "alice is a good girl she is a good student", first = "a", second = "good"
输出:["girl","student"]

示例 2:

输入:text = "we will we will rock you", first = "we", second = "will"
输出:["we","rock"]

javascript 复制代码
/**
 * @param {string} text
 * @param {string} first
 * @param {string} second
 * @return {string[]}
 */
var findOcurrences = function (text, first, second) {
  let arr = text.split(' ');
  let res = []
  arr.forEach((word, index) => {
    if (index < arr.length - 2) {
      if (word === first && arr[index + 1] === second) {
        res.push(arr[index + 2])
      }
    }
  });
  return res;
};

findOcurrences('we will we will rock you', 'we', 'will')