Re: Short form (ternary) if else

I think what you're looking for is this:

my $vxdg = exists $vxdg{$node}{$disk} ? $vxdg{$node}{$disk} : '';
[download]

Also, in your if/else statement, if you declare $vxdg inside the if/else like you are doing, it goes out of scope by the time you get out of the if/else block.

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Re^2: Short form (ternary) if else by gg48gg (Sexton) on Feb 08, 2012 at 20:29 UTC
Yes, that works beautifully! Thank you! I realize the scope issue as well. So, what I understand is that ternary form is only for use after an assignment (=) operator? Is that correct?	[reply]
Re^3: Short form (ternary) if else by tobyink (Canon) on Feb 09, 2012 at 11:18 UTC
No, it doesn't have to be used in conjunction with assignment. Consider: `printf("X is %s\n", defined $X ? $X : 'undefined');` [download] Or: `sub get_name { # ... return wantarray ? ($firstname, $middlename, $lastname) : "$firstname $lastname"; }` [download]	[reply] [d/l] [select]
Re^3: Short form (ternary) if else by DStaal (Chaplain) on Feb 09, 2012 at 21:40 UTC
Yes and no... It is typically at it's most useful after an assignment, and it's use is that it generates a value, but that doesn't necessarily mean it needs to be used in an assignment. Others have given examples, but the essential thing to remember is that the ternary operator returns a value. `if` does not: It is a flow-control operator. So, where it does need to be used is where Perl would expect a value. Assignments are one common case of that.	[reply] [d/l]