Hi cgmd,

It's because the value of $baseball{mets} is not defined at the point you're trying to use it.

Note how the warning goes away with something like: 

my $yanks = $baseball{yankees} || "";
my $mets  = $baseball{mets}    || "";
if ( $baseball{yankees} = $yanks.$mets )  {
    foreach $_ (keys %baseball) {
        print "$_ => $baseball{$_}\n";
    }
}

[download]

You could also do it this way: 

if ( $baseball{yankees}=($baseball{yankees} || ""). ($baseball{mets} |
+| "") )  {
    foreach $_ (keys %baseball) {
        print "$_ => $baseball{$_}\n";
    }
}

[download]

This is all assuming, of course, that you really mean to do the assignment $baseball{yankees}=$baseball{yankees}.$mets.

If instead you are doing a comparison, you'd probably want to use eq (for string comparisons) rather than == (for numerical comparisons).

s''(q.S:$/9=(T1';s;(..)(..);$..=substr+crypt($1,$2),2,3;eg;print$..$/

In reply to Re: problem unless I use ".=" by liverpole
in thread problem unless I use ".=" by cgmd

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