From: Robert Klemme <bob.news@...>
Date: 2004-12-02T19:52:42+09:00
Subject: Re: Does Ruby have anything like isprint?


"Dave Burt" <dave@burt.id.au> schrieb im Newsbeitrag
news:LJzrd.55898$K7.47722@news-server.bigpond.net.au...
> "Martin Kahlert" <mkcon@gmx.de> wrote...
> > Hi!
> >
> > I want to print out the 'printable' characters from a binary
> > data stream.
> > Is there anything like C's isprint() function in Ruby?
> >
> > Thanks,
> > Martin.
>
> You can use the POSIX regular expression 'metacharacter' [:print:] to
match
> a printing character.
>
> def isprint(c)
>   /[[:print:]]/ === c.chr
> end
>
> Or you can .gsub(/[^[:print:]]/, '') on a string, etc.

I prefer to use scan as this is likely more memory efficient (no copy of
the whole thing needed):

binary_string.scan(/[[:print:]]+/) { |s| print s }

Kind regards

    robert