There is nothing elegant, or smart about doing this, but because we're playing with Perl, it is possible:

$a[3] = "Hello";
$b = 'a';
$c = '[3]';
$d = eval "\$$b$c";
print "$d\n";

[download]

Output: Hello. Hopefully the fact that this violates strict 'refs', strict 'vars', and requires string eval should be enough warning flags to dissuade using the construct.

Here's how it works. First, we assign a value to $a[3]. Then we construct a string that looks like "$a[3]" using a component that looks like "a", and a component that looks like [3]. Then we evaluate that string as if it were code. The code is an expression returning the value stored in @a's fourth element.


Dave

In reply to Re: Combining 2 variable? by davido
in thread Combining 2 variable? by Krillian

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