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javascriptregexfilenames

Regular expression to remove a file's extension

I am in need of a regular expression that can remove the extension of a filename, returning only the name of the file.

Here are some examples of inputs and outputs:

myfile.png     -> myfile
myfile.png.jpg -> myfile.png

I can obviously do this manually (ie removing everything from the last dot) but I'm sure that there is a regular expression that can do this by itself.

Just for the record, I am doing this in JavaScript

Solution 
  • /(.*)\.[^.]+$/

    Result will be in that first capture group. However, it's probably more efficient to just find the position of the rightmost period and then take everything before it, without using regex.