On 3/2/07, Kevin Viel <[EMAIL PROTECTED]> wrote:
Greetings,
I have been struggling with this one for a while. How can I create a
variable name composed of two or more variables? I suspect I have to I
have to use a reference:
my $var1 = "part" ;
my $var2 = "2" ;
my $compound = $var1_$var2 ;
snip
Generally it is a mistake to try to do this. There is most likely a
better/simpler way to achieve what you are trying to do. Look more
closely at the data structures available to you (hashes, arrays, and
combinations thereof). A good starting point is perldoc perldsc or
the online version http://perldoc.perl.org/perldsc.html. If you
explain why you want to do this to the list we may be able to point
you in the right direction.
But to answer your question (though I hope you choose a better
solution to your problem) you can use the string variant of the eval
function:
#!/usr/bin/perl
use strict;
my $part_2 = "Not a good idea";
my $var1 = "part";
my $var2 = "2";
my $compound = eval "\$${var1}_$var2";
print "$compound\n";
There are three important things to note about this:
1. it is a really bad idea
2. the first $ must be escaped to avoid the first evaluation (the
interpolation into the string)
3. $var1 must be in the form of ${var1} because $var1_ is a valid variable name
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