2

这是我的文本字符串:

0000> hello world <0000

我想计算“0000>”和“<0000”之间的字符。

4

5 回答 5

2

这将起作用:

s = "0000> hello my name is james, whats yours? <0000";
s.match(/0000>(.*?)<0000/)[1].length // returns 38;

但是话又说回来,这也会:-)

s.length - 10; // returns 38
于 2012-11-10T13:00:45.217 回答
1

好吧,这样的事情会计算 0000> 和 <0000 之间的所有内容(包括空格):

'0000> hello my name is james, whats yours? <0000'
  .split(/0000>|<0000/g)[1].length; //=> 38

或者

'0000> hello my name is james, whats yours? <0000'
     .replace(/0000>|<0000/g,'').length; //=> 38
于 2012-11-10T13:00:27.537 回答
1

这将做:

function count(string) {
  var match = /0000>(.*)<0000/g.exec(string);

  if (match.length > 1) {
    return match[1].trim().length;
  } else {
    return null;
  }
}

alert (count("0000> hello my name is james, whats yours? <0000"));

以及 jsfiddle 演示:http: //jsfiddle.net/pSJGk/1/

于 2012-11-10T13:02:28.190 回答
0
function getLengthBetween(str,startStr,stopStr) {
  var startPos = str.indexOf(startStr);
  if(startPos == -1) {
    return 0;
  }
  var startOffset = startPos+startStr.length;
  var stopPos  = str.indexOf(stopStr,startOffset);
  if(stopPos == -1) {
    stopPos = str.length;
  }
  return stopPos-startOffset;
}

用法:

getLengthBetween("0000> hello my name is james, whats yours? <0000","0000>","<0000");
于 2012-11-10T13:05:02.977 回答
0

我建议:

var str = " 0000> hello my name is james, whats yours? <0000",
    start = "0000>",
    end = "<0000",
    between = str.substring(str.indexOf(start) + start.length, str.indexOf(end)).length;

console.log(between);​

JS 小提琴演示

但是,这不会从第一个匹配之后或第二个匹配之前修剪空白。当然,这可以通过简单地更改变量来更改以匹配任何给定的字符串分隔符。

参考:

于 2012-11-10T13:02:24.650 回答