I wan to write a sub return true or false if the var was initialized.
We can do that, but I really don't think we need a sub for it, since there is a built-in.
Can someone correct this sub or is it good?
No, I wouldn't call it good.
...
if(isNULL($x) { print "it is null\n");
if ( ! defined $x ) { ... }
else { print "it is NOT null\n"); ...
sub isNULL { return $_[0] =~ //
This Regex doesn't do what you think. It reuses the last successful match.
You don't want a Regex here anyway, you meant:
$_[0] eq '';
Since I could set a variable to the empty string though, that doesn't really answer your question.
Hope that helps.
James
}
thanks, -rkl
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