I gave the example :P "%02X" prints a number as hex, 2 chars in length
(assuming no more than 2 chars wide), padded with zeroes. Same as
you'd do in any other lang with C-style printf.

On 2/4/07, Oliver Bandel <oliver@first.in-berlin.de> wrote:
> On Sun, Feb 04, 2007 at 02:11:43PM +1300, Jonathan Roewen wrote:
> > Don't think so. I'm pretty sure padding of strings is only with
> > spaces.
>
> The format-string "%02s" should make a '0' instead of ' '
> as filling, IMHO.
>
>
> > Padding of numbers has to be specified for a number format.
>
> IMHO  "%2s" should make a string of at least two chars
> length, fillingup with ' ' on the left side.
>
> And "%0s" should make it with a filling-char '0'
> instead of filling-chars ' '.
>
>
>
> >
> > let hex_of_byte b = Printf.sprintf "%02X" b;;
> >
> > Why you'd use two sprintfs is the real oddity =P
>
> The inner sprintf makes hex from int and the outer
> makes two-char-string instead of one-char-string.
>
> Or how to make hex-output with filling '0' instead
> of ' ' for two-char length strings?
>
> Would a "%00X" work?!
>
>
> Ciao,
>   Oliver
>
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