From: Dave Burt <dave@...>
Date: 2004-12-02T16:47:44+09:00
Subject: Re: Does Ruby have anything like isprint?

"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.