1078. Bigram 分词

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"]
 

提示:

1 <= text.length <= 1000
text 由一些用空格分隔的单词组成,每个单词都由小写英文字母组成
1 <= first.length, second.length <= 10
first 和 second 由小写英文字母组成

来源:力扣(LeetCode)
链接:https://leetcode-cn.com/problems/occurrences-after-bigram
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题解

/**
 * @param {string} text
 * @param {string} first
 * @param {string} second
 * @return {string[]}
 */
var findOcurrences = function(text, first, second) {
    let res = []
    text = text.split(' ')
    if (text.length > 2) {
        for (let i = 2; i < text.length; i++) {
            if (text[i - 2] == first && text[i - 1] == second) {
                res.push(text[i])
            }
        }
    }
    return res
};