On Thu, Jul 10, 2003 at 02:50:21PM +0900, Daniel Carrera wrote:
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> On Thu, Jul 10, 2003 at 02:47:16PM +0900, Mauricio FernáÏdez wrote:
> 
> > What about 
> > 
> > require 'English'
> > re = ARGV.shift
> > $DEFAULT_INPUT.each{|x| puts x if x =~ /#{re}/}
> > 
> > ??
> > 
> > It's two lines if you use '$<'...
> 
> Did you see mine?  It was one line! (with a semicolon though :)

They're the same if you omit the fact that I forgot about Enumerable#grep ;) 
It turns out that $<, $DEFAULT_INPUT _and_ ARGF are synonyms. 

IMHO one semicolon is equivalent to one line-break but we can still make
it a one-liner without cheating:

 re = ARGV.shift and puts ARGF.grep(/#{re}/)

However, I don't quite like this example, it feels perlish.
I'd rather show singleton methods at work, or blocks, or metaclasses...

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