Need a basename function in Javascript

Question

I need a short basename function (one-liner ?) for Javascript:

basename(\"/a/folder/file.a.ext\") -> \"file.a\"
basename(\"/a/folder/file.ext\") -> \"f         


        

Answer 1

Fairly simple using regex:

function basename(input) {
   return input.split(/\.[^.]+$/)[0];
}

Explanation:

Matches a single dot character, followed by any character except a dot ([^.]), one or more times (+), tied to the end of the string ($).

It then splits the string based on this matching criteria, and returns the first result (ie everything before the match).

[EDIT] D'oh. Misread the question -- he wants to strip off the path as well. Oh well, this answers half the question anyway.