Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling
 
PerlMonks  

Re: Finding a hash key from the value (reverse lookup)

by davorg (Chancellor)
on Jan 22, 2001 at 19:03 UTC ( #53498=note: print w/ replies, xml ) Need Help??


in reply to Finding a hash key from the value (reverse lookup)

The reverse method only works if your values are unique. If they are and you will be doing a lot of reverse lookups then it's worth building a reverse lookup hash. This is far simpler than it sounds:

my %rev_hash = reverse %hash;
--
<http://www.dave.org.uk>

"Perl makes the fun jobs fun
and the boring jobs bearable" - me


Comment on Re: Finding a hash key from the value (reverse lookup)
Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://53498]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others meditating upon the Monastery: (14)
As of 2015-07-06 18:42 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 (80 votes), past polls