- or download this
$time{2016}{November}{03}{sales} = 2500;
- or download this
if(!defined $hash_ref->{$block}->{$libName}) {
print "This is a test\n";
}
- or download this
if(exists $hash_ref{$block} and !defined $hash_ref{$block}{$libName})
+{
print "This is a test\n";
}