[ruby-talk:12823] Re: Tk Demo in Windows

On Saturday 17 March 2001 21:10, Ron Jeffries wrote:
> Using cmd /c makes it type OK but it still doesn't DO anything. Am I
> right that what this bizarre, intricate and non-working code is
> supposed to do is eval the contents of file whatever.rb? Sure looks
> that way to me.
>
> Nearly as I can tell, the type command, when executed under Ruby,
> doesn't answer the stuff typed out, how nice.
>
> I guess I'll have to figure out the quickest way to get the contents
> of a file now ... ;-> How hard could that be?
>
> Thanks ... off to the next step in a slow learning process ...
>
> R
>
> On Sun, 18 Mar 2001 05:22:07 +0900, Dave Thomas
>
> <[e-mail]> wrote:
> >Ron Jeffries <[e-mail]> writes:
> >> Replacing cat with type, however, results in the similar message as
> >> before, for example:
> >
> >I believe that 'type' is built in to the windows command processor, so
> >you'll need to make it
> >
> >    cmd /c type ...
> >
> >(or command /c type ... depending on what you're running) You can try
> >this from the command line to check.
> >
> >
> >

In the Unix world, things like ls (win=dir) and cat (win=type) are separate 
programsd; in the Windows world, many of these actions are built into 
command.com. Thus, in Ruby, %x{cat myfile.txt} delievers results (as would 
%x{cat myfile.txt | grep "Quoth the Raven"}

In Windows, it might be better to "Rubyfy" all the way. For example:

File.open("myfile.txt").readlines.each do |line|
  puts line
end

will produce the same reult as C:> type myfile.txt from the command line in 
Windows (actually Dos).

Neither way is better or worse than the other (ok, some people _do_ have 
strong opinions on this _and_ there may be some small technical issues re 
efficiency) and the bottom line is when in Windows do as Windows does. :-)

Now, ESR describes Unix as transcending the issue of OS and becomes a "way of 
thinking". Read into that what you will. :-)

Hope this helps a bit.

Regards,

Kent Starr
[e-mail]