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-poin...
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.
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