Thanks for pointing that out. TIL --> which is another example of "two operators smashed together does something cool". Too bad it doesn't work in Ruby, but it does in Perl:

$ perl -e '$x=3; print "hi\n" while ($x --> 0)'

hi

hi

hi

Sean

On Sat, Feb 28, 2015 at 1:38 AM, Trevor Cordes <trevor@tecnopolis.ca> wrote:

I had to confirm what $x=!!$y meant in perl.  Remarkably, typing !! or
"!!" or \!\! into google gives you nothing.  Had to use English.

Got this:

http://stackoverflow.com/questions/2168406/what-does-double-exclamation-point-mean

The +42 answer is quite good.  Exec summary: !! is good for cleaning vars
into 1 (true) or '' (false), which is important to keep warnings from
complaining about undef vars.

Anyhow, read the comments in the +42 answer.  Hehehe.

Let the flamewars begin!
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Sean Walberg <sean@ertw.com>    http://ertw.com/

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