Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation
 
PerlMonks  

Re^4: What operator should perl5porters use for safe dereferencing?

by Jenda (Abbot)
on May 31, 2012 at 14:33 UTC ( #973538=note: print w/ replies, xml ) Need Help??


in reply to Re^3: What operator should perl5porters use for safe dereferencing?
in thread What operator should perl5porters use for safe dereferencing?

I doubt there exists a situation where I would want to ignore all exceptions.

There do exist situations in which I will want to catch and log any exception and move on to the next task though, but this is a different thing. There's a huge difference between being able to shorten

my $age = do { my $boss = $company->boss(); my $wife = $boss ? $boss->wife() : undef; $wife ? $wife->age() : undef };
to just
my $age = $company~>boss()~>wife()~>age();
and just ignoring anything that might happen while getting that info. Because, you know, if the company has no boss or the boss has no wife, then the age is actually undefined. On the other hand if there was a problem loading the data from the database or where ever, I want to know, because then the value is not undefined. It could not be "computed".

Jenda
Enoch was right!
Enjoy the last years of Rome.


Comment on Re^4: What operator should perl5porters use for safe dereferencing?
Select or Download Code
Re^5: What operator should perl5porters use for safe dereferencing?
by Anonymous Monk on Jun 01, 2012 at 02:53 UTC

    Because, you know, if the company has no boss or the boss has no wife, then the age is actually undefined.

    Dare I suggest a Null wife?

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://973538]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others imbibing at the Monastery: (7)
As of 2014-09-20 18:52 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    How do you remember the number of days in each month?











    Results (160 votes), past polls