dynamically picking up Hashes or variables based on argument passed.

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Greetings Wise Monks, I have a novice question. I would like to do the following but seems like I am missing something minor.

my $temp_2 = "foo";
my $temp_3 = "bar";

for ($i = 2; $i < 4; $i++) {
    print ${"temp_$i"},"\n";
}
[download]

Is this possible, and how can I make it work? Thanks for your help in advance!

Comment on dynamically picking up Hashes or variables based on argument passed. Download Code

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Re: dynamically picking up Hashes or variables based on argument passed. by FunkyMonk (Bishop) on Nov 19, 2007 at 21:20 UTC
The best way is to use a hash: `my %temps = ( temp_2 => "foo", temp_3 => "bar" ); for my $i ( 2 .. 3 ) { print $temps{"temp_$i"}, "\n"; }` [download] Notice that I changed your for loop into something a little more perlish. untested: my Perl box broke :(	[reply] [d/l] [select]
Re^2: dynamically picking up Hashes or variables based on argument passed. by Anonymous Monk on Nov 19, 2007 at 22:48 UTC
Thanks everyone! The link was helpful too!	[reply]
Re: dynamically picking up Hashes or variables based on argument passed. by Corion (Patriarch) on Nov 19, 2007 at 21:14 UTC
See Why it's Stupid to use a Variable as a Variable Name. You want to use a hash that has your variable names as keys and references to the variables you use. Update: Link fixed, thanks to Roy Johnson	[reply]
Re: dynamically picking up Hashes or variables based on argument passed. by Roy Johnson (Monsignor) on Nov 19, 2007 at 21:15 UTC
You can't use symbolic references on `my` variables. And you probably don't need to. Use a hash. See Why it's stupid to `use a variable as a variable name'. Caution: Contents may have been coded under pressure.	[reply] [d/l]