jQuery如何删除或替换last之后的文本

Question

我可以删除或替换最后一个接受点（.）后的任何文本吗

ex)OUTsoundfile.123054236.123054236.wav 

我想删除.wav或用空字符串替换.wav

无法使用subString，因为输入文本中可能不存在.wav。

Answer 1

尝试

x.substring(0, x.lastIndexOf("."));

FIDDLE

Answer 2

使用regexp替换，例如

 'OUTsoundfile.123054236.123054236.wav'.replace(/.wav/,'');

阅读有关替换功能的更多信息

Answer 3

这将是正确的正则表达式：

var myString = "ex)OUTsoundfile.123054236.123054236.wav";
var output = myString.replace(/.[^.]*$/, '');

http://jsfiddle.net/samliew/3UdLH/

Answer 4

使用普通的旧JavaScript:

var filename = "OUTsoundfile.123054236.123054236.wav";
var pieces = filename.split(".");
  // pieces is an array that looks like this:
  // ["OUTsoundfile", "123054236", "123054236", "wav"]
  // Remove the last element from pieces, i.e. "wav"
  // If you want to do anything with this last piece, such as check what the
  // piece you removed was, use the return value of this statement.
pieces.pop();
  // pieces now just looks like this:
  // ["OUTsoundfile", "123054236", "123054236"]
  // Put the string back together
var newFilename = pieces.join(".");
  // newFilename is now this string: "OUTsoundfile.123054236.123054236"

或者，没有评论：

var filename = "OUTsoundfile.123054236.123054236.wav";
var pieces = filename.split(".");
pieces.pop();
var newFilename = pieces.join(".");

Answer 5

尝试

var trimwav = "ex)OUTsoundfile.123054236.123054236.wav";
alert(trimwav.substr(0,x.lastIndexOf(".")));