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

function baseName(str)
{
   var base = new String(str).substring(str.lastIndexOf('/') + 1); 
    if(base.lastIndexOf(".") != -1)       
        base = base.substring(0, base.lastIndexOf("."));
   return base;
}

If you can have both / and \ as separators, you have to change the code to add one more line

Answer 2

Using modern (2020) js code:

function basename (path) {
  return path.substring(path.lastIndexOf('/') + 1)
}
console.log(basename('/home/user/file.txt'))

Answer 3

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.

Answer 4

if your original string or text file contains single backslash character, you could locate it by using '\'. in my circumstance, i am using javascript to find the index of "\N" from a text file. and str.indexOf('\N'); helped me locate the \N from the original string which is read from the source file. hope it helps.

Answer 5

 basename = function(path) {
    return path.replace(/.*\/|\.[^.]*$/g, '');
 }

replace anything that ends with a slash .*\/ or dot - some non-dots - end \.[^.]*$ with nothing

Answer 6

my_basename('http://www.example.com/dir/file.php?param1=blabla#cprod',   '/',  '?');
// returns:  file.php

CODE:

function my_basename(str, DirSeparator, FileSeparator) { var x= str.split(DirSeparator); return x[x.length-1].split(FileSeparator)[0];}