From: Steve Klabnik <steve@...>
Date: 2012-02-09T02:26:14+09:00
Subject: Re: Using _ like in Scala?

Ruby has Perl's $_, but only in certain contexts:

$ echo "foo" |  ruby -pe 'next unless $_ =~ /(foo|bar|baz)/'
foo
$

For example. I'm not sure when it's valid, as this perl-ism isn't:

1.9.2p290 :001 > fruits = %w( apple banana orange )
 => ["apple", "banana", "orange"]
1.9.2p290 :002 > fruits.each { puts $_ }



 => ["apple", "banana", "orange"]