Javascript/Jquery 从带有换行符的文本区域字符串中获取前 100 个单词

Question

我的文本区域中有以下文本

var text = "asdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw er
asdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw er
asdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw er
asdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw erasdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw erasdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw erasdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw er
asdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw er
asdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw er
asdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw er";

现在我想使用 jquery/javascript 从该字符串中提取前 100 个单词，这是我从字符串中提取单词的代码。

var wordLimit = 100;

var re ='(([^\\s]+\\s\\s*){' + wordLimit + '})(.*)';

var extractedText = text.replace(new RegExp(re, "gm"), '$1');

console.log(extractedText.match(/\S+/g).length);

但是当我控制台extractedText的长度时，它返回165而不是100，这是错误的，任何人都可以找到我犯错误的地方。

Answer 1

这应该对你有帮助。

函数getWords()返回x个单词数。我刚刚在其末尾添加了 .split("").length，以便您可以看到它返回的字数。

var text = $("#text").val()


var wordLimit = 100;

function getWords(str) {
    return str.split(/\s+/).slice(0,wordLimit).join(" ");
}

console.log("we have " + text.split(" ").length + " words")

console.log("getWords returned " + getWords(text).split(" ").length + " words");

$("#result").val(text.substring(0,getWords(text).length))

textarea{
  height:300px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<textarea id="text">asdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw er
asdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw er
asdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw er
asdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw erasdf wr we rwe rwe rw er
wer
we
r wer we we rwe rw er
asdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw erasdf wr we rwe rwe rw er
r wer we we rwe rw er
asdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw erasdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw erasdf wr we rwe rwe rw er
wer
wer
wer
we
r wer we we rwe rw erasdf wr we rwe rwe rw er
wer
wer
wer
we</textarea>
<textarea id="result"></textarea>