Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw
 
PerlMonks  

Re: the if statement

by broomduster (Priest)
on Sep 27, 2008 at 22:11 UTC ( #714066=note: print w/ replies, xml ) Need Help??


in reply to the if statement

This looks like homework, so here are some hints.

(keys %hash) is a list of the keys for %hash. The scalar assignment $input = (keys %hash) puts the number of keys into $input (which is probably not what you want to do). OTOH, to compare $input to each of the keys, you need to loop through the keys, comparing $input to each key. Since the keys (and the user input) are strings, you use eq to do the comparison.

Updated: Scrub the stupidity; no need to check everything; this is a hash, after all.


Comment on Re: the if statement
Select or Download Code
Re^2: the if statement
by FunkyMonk (Canon) on Sep 27, 2008 at 22:50 UTC
    you need to loop through the keys, comparing $input to each key
    That's what exists is for. In this case if ($hash{$input}) { ... } is probably good enough.
Re^2: the if statement
by eyepopslikeamosquito (Canon) on Sep 28, 2008 at 02:27 UTC

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://714066]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others studying the Monastery: (13)
As of 2014-12-26 17:29 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    Is guessing a good strategy for surviving in the IT business?





    Results (174 votes), past polls