From: daniel <daniel.leuenberger@...>
Date: 2007-07-26T06:45:07+09:00
Subject: Re: read variables from string

On 25 Jul., 17:38, "Harry Kakueki" <list.p...@gmail.com> wrote:
> On 7/26/07, daniel <daniel.leuenber...@gmx.ch> wrote:> Hi,
>
> > I would like to extract an array of e.g. integers or floats from a
> > string:
>
> > s = "1234" -> [12,34]
> > s = "12.413.423.7" -> [12.4,13.4,23.7]
>
> > How can I use unpack for that? What format string do I need for the
> > two examples above?
>
> It depends on your rules for extracting data.
>
> You can try something like this.
>
> s = "1234" #-> [12,34]
> t = "12.413.423.7" #-> [12.4,13.4,23.7]
> p s.scan(/\d{2}/).map{|x| x.to_i}
> p t.unpack("a4a4a4").map{|x| x.to_f}
>
> There are probably better ways.
>
> Harry
>
> --
> A Look into Japanese Ruby List in Englishhttp://www.kakueki.com/

Thanks for your input. But I was looking for something like an inverse
of sprintf (where you can extract variables from a string according to
a given format, instead of gluing a string together from variables).
Does anybody know if something like this exists in ruby?

Thanks,
Daniel