From: Bob Showalter <showaltb@...>
Date: 2007-04-26T22:04:48+09:00
Subject: Re: [SUMMARY] Morse Code (#121)

On 4/26/07, Ruby Quiz <james@grayproductions.net> wrote:

>            block[prefix] if @@words.nil? || @@words.include?(prefix)

I didn't understand that when I first saw it. I kept looking for
"yield". Now I see that "block[prefix]" is the same as "yield prefix".
Or are there differences?

>          # returns list of words starting with prefix that can be made from code
>          def self.words(code = @code, prefix = '')
>
> (ignore that unused default)

Oops. That's a leftover from my original approach that had words as an
instance method instead of a class method.

> The next line is a usage statement printed by abort().  We don't see that method
> too often in quiz solutions, but it prints a message to STDERR, when provided,
> and then terminates the program.

That's an old Perl'er used to "die()". raise() is so brutal for this
kind of thing :~)