Question

给出句子the description is about fast cars。和一个字符串str = description is，我怎么能得到“关于”这个词？

我尝试了一下正则表达式后面但却无法想出一个优雅的方式。任何其他建议然后使用indexOf几次以及拆分拼接？ THX

    let re = new RegExp('(?<=' + str + ').*');
    let result = mySentence.match(re)[0].split(' ')[0];

修改
我忘了添加str匹配应该不区分大小写。

Answer 1

没有必要前瞻。

＆＃13;

let s = "the description is about fast cars"
let f = "description is";

let r = new RegExp(f + "\\s(\\w+)");
console.log(s.match(r)[1]);

＆＃13;

Answer 2

试试这个：

var sentence = "the description is about fast cars";
var word = "description is";

function getFirstAfterSplitSentence(sentence, word) {
  return sentence.split(word)[1].split(" ")[1];
}

console.log(getFirstAfterSplitSentence(sentence, "is"));

Answer 3

一般方法是：

const orig = 'the description is about fast cars';
const str = 'description is';

const result = orig.split(str).pop().trim().split(' ').shift();
console.log(result);

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提取变量中给定字符串后的第一个单词

3 个答案: