Re: A path commonPrefix function

[marks]

This version walks forward char by char. Is there a nim equivalent to Python's 
`timeit` module for timing snippets? 
    
    
    proc commonPrefix*(paths: openArray[string], sep = "/"): string =
      if len(paths) == 0:
        return ""
      result = paths[0]
      var index = 0
      var ok = false
      for path in paths[1 .. ^1]:
        while index < len(path) and index < len(result) and
            result[index] == path[index]:
          inc index
          ok = true
      result = if not ok:
          ""
      else:
        result[0 .. result.rfind(sep, 0, index)]
    
    
    Run