Re: passing a scalar to a function

Arguments to subroutines are passed in the array @_, not in $_.

You could do something like this:

sub mycheck {
   my $db = shift || "";
}
# or
sub mycheck2 {
   my $db = @_ ? $_[0] : "";
}
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Re^2: passing a scalar to a function by linuxer (Curate) on May 19, 2008 at 11:07 UTC
I want to point out, that we should be aware of the difference in those two solutions: The first solution will set $db to "", when the argument evaluates to FALSE. This will happen, when the argument is undef, empty string or 0 [zero]). So if undef and zero are wanted and valid values, the second solution should be used.	[reply]
Re^2: passing a scalar to a function by nsupathy0 (Initiate) on May 19, 2008 at 13:02 UTC
Thank you for your wisdom. That was really helpful. $_ was a typo. I thought there was a "perl" way of doing this. The idiom `@_ ? $_[0] : ""` was a better one.	[reply] [d/l]