From: Michael Neumann <mneumann@...>
Date: 2004-06-20T02:01:14+09:00
Subject: Re: [RCR] IO#readn

On Sun, Jun 20, 2004 at 01:33:18AM +0900, Ara.T.Howard wrote:
> On Sun, 20 Jun 2004, Michael Neumann wrote:
> 
> >Hi,
> >
> >I suggest to add a method readn to the IO class (and to StringIO,
> >Socket...), which behaves similar to read(n), but raises an exception if
> >the returned string is not of size n.
> >
> > class IO
> >   def readn(n)
> >     str = read(n)
> >     raise if str.nil? or str.size != n
> >     str
> >   end
> > end
> >
> >It's annoying to test for it in the application.
> >
> >Regards,
> >
> > Michael
> 
> don't you think the code will be just as long/annoying with a begin/rescue
> block?

No, as I wouldn't use a rescue clause in this case. It's better to crash
early than proceed with a wrong value.

I never liked it that read(4) might return only 3 characters.

Regards,

  Michael