Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change

Re: %% in perl mean

by tobyink (Abbot)
on Sep 11, 2013 at 20:34 UTC ( #1053563=note: print w/replies, xml ) Need Help??

in reply to %% in perl mean

In this case, it's just two percent character which are being searched for in a search-and-replace operation (s///). However it does have two special meanings in Perl...

  1. The printf and sprintf functions take a formatting string as their first argument. This formatting string uses special codes that start with a "%" character; such as "%d" which is a placeholder for an integer. When you want the output to include a literal "%" character, you can't just place that as-is in the formatting string; instead you use "%%".

  2. The other place "%%" is special in Perl is that there's a global hash called %%. You can assign values to it and use it like any other hash; the only difference is that you don't declare it with my or our - it's pre-defined.

    use Data::Dumper; %% = (foo => 1, bar => 2); print Dumper \%%;
use Moops; class Cow :rw { has name => (default => 'Ermintrude') }; say Cow->new->name

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1053563]
[Happy-the-monk]: Discipulus: most other Europeans must wait until 8 May for that day.

How do I use this? | Other CB clients
Other Users?
Others exploiting the Monastery: (5)
As of 2018-04-25 09:30 GMT
Find Nodes?
    Voting Booth?