Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things
 
PerlMonks  

Re^7: Perl Idioms Explained - keys %{{map{$_=>1}@list}}

by Roy Johnson (Monsignor)
on Mar 02, 2005 at 16:11 UTC ( #435898=note: print w/replies, xml ) Need Help??


in reply to Re^6: Perl Idioms Explained - keys %{{map{$_=>1}@list}}
in thread Perl Idioms Explained - keys %{{map{$_=>1}@list}}

I would not have expected #3's behavior. Would you? I think it merits an "undef is not a listop" warning. The correct way to undef the values is: @h{qw|a b c|} = ();
The correct way to autovivify them but leave them unmodified if they already exist is () = \@h{qw(a b c)};

Caution: Contents may have been coded under pressure.

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://435898]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others avoiding work at the Monastery: (7)
As of 2016-10-01 23:27 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    How many different varieties (color, size, etc) of socks do you have in your sock drawer?






    Results (9 votes). Check out past polls.