Re: Calling a function from a :s command (weird results)

On Mon, 1 Dec 2003, Benji Fisher wrote:

> [...]
>
>      I assume that this worked when the InvertString() function was
> first posted to the list, but broken by a later patch.  The oldest
> version of vim that I have lying around is 6.1.400.  Does anyone with
> an older version get different results?

(I recently upgraded to 6.2, so I can't answer your question.) Just for
those who are interested.. Preben was indeed right, InvertString()
turned out to be about twice as fast as a comparable solution based on a
:while loop.

For

    function! InvertString(str)
        let inverted = ''
        let n = strlen(a:str) - 1
        while n >= 0
          let inverted = inverted . a:str[n]
          let n = n - 1
        endwhile
        return inverted
    endfunction

and

    let n = 3000
    while n > 0
      let x = InvertString('abcdefghijklmnopqrstuvwxyz')
      let n = n - 1
    endwhile

I got 10 and 5 seconds..

Klaus