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

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


Comment on Re: variable constructs that I do not understand
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://924470]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others making s'mores by the fire in the courtyard of the Monastery: (5)
As of 2014-07-25 00:32 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    My favorite superfluous repetitious redundant duplicative phrase is:









    Results (167 votes), past polls