Beefy Boxes and Bandwidth Generously Provided by pair Networks
"be consistent"
 
PerlMonks  

Re: $|-- rocks.

by eyepopslikeamosquito (Chancellor)
on Jan 04, 2014 at 07:19 UTC ( #1069248=note: print w/ replies, xml ) Need Help??


in reply to $|-- rocks.

Running on my machine with Perl 5.16.3 produces:

er,ackrl heP Just another
Changing $|-- to --$| like so:
sub _{@_<2&&return print@_;my@a;push@{$a[--$|]},$_ for @_;_(@$_)for@a};_ split//,"huroP cels,tetah Jen akrr";
produces the required:
Just another Perl hacker,
See also: Japhy explains where behaviour of --$| is documented.

Update: To further clarify this mysterious "flip-flop" behavior when $| is --'ed, but not when ++'ed, notice that running:

perl -le 'print --$| for 1..5'
produces:
1 0 1 0 1
while running:
perl -le 'print ++$| for 1..5'
produces:
1 1 1 1 1
BTW, this magical --$| flip-flop often produces the shortest Perl golf solutions when you need to flip-flop between two different values in a loop; for example, it was used in Re^2: Mini-Tutorial: Working with Odd/Even Elements and Spending Time on Saving Time [golf].


Comment on Re: $|-- rocks.
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1069248]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (13)
As of 2015-07-31 20:35 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (281 votes), past polls