[wplug] novice question on perl assignment operator

[Juan Zuluaga]

Dear wplug people, 

I got bitten by something very very basic, 

#!/usr/bin/perl -w
use strict;

my $a = "a";
my $b = "b";
my $concat = $a . $b;
print "$concat\n";
   $b = "newb";
print "$concat\n";  # prints  ab instead of anewb ! 

how should i define $concat to make it respond to
changes in its constituents? (what would be technical
terms for this ?) 

http://socioenlinea.blog.lemonde.fr/socioenlinea/
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