Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris

Re: variable constructs that I do not understand

by wink (Scribe)
on Sep 06, 2011 at 21:42 UTC ( #924470=note: print w/replies, xml ) Need Help??

in reply to variable constructs that I do not understand

Perl allows you to use the value of one scalar as the identifier for another. Rarely is it a good idea, but occasionally it is useful.

$var = 'foo'; $foo = 'bar'; print $var; # Will print "foo" print $$var; # Will print "bar"
Also, you can use curly braces around a variable when it might be confusing to the compiler what you mean.
$foo = 'foo'; print "$food"; # Will print nothing (no scalar $food is defined) print "${foo}d"; # Will print 'food' as expected

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://924470]
[james28909]: who isnt confused?
[james28909]: lol
[james28909]: my wife isnt confused... she knows everything

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (10)
As of 2017-12-15 13:14 GMT
Find Nodes?
    Voting Booth?
    What programming language do you hate the most?

    Results (432 votes). Check out past polls.