Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine
 
PerlMonks  

Re: OOP Confusion

by Bloodnok (Vicar)
on Mar 22, 2014 at 12:07 UTC ( #1079385=note: print w/replies, xml ) Need Help??


in reply to OOP Confusion

To a certain degree, I share your confusion - ordinarily you wouldn't expect the result of a database query to be stored within an object, however this may be the author's attempt at memoization whereby the results of a previous query are stored for efficiency reasons.

That being said, the code snippet gives no clues as to the rationale behind the existence of the method e.g. why is the result of a get_sites() invocation not implemented within the constructor since it always returns a list of all sites i.e. takes no arg(s) that might constrain the result set in some way - unless it's available purely and simply to refresh the result set.

Of course, as has been said elsewhere, the memoization directly raises it's own problems e.g. caching, and so is not a really sensible way of working; The method should, IMO, merely return the result set from the query, letting the caller determine to what use it should be put - by doing so it would provide the necessary degree of abstraction between the structure of the query on the backend DB and the data returned from the query - a la the GoF Facade Pattern.

A user level that continues to overstate my experience :-))

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://1079385]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others making s'mores by the fire in the courtyard of the Monastery: (6)
As of 2022-05-16 09:53 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Do you prefer to work remotely?



    Results (62 votes). Check out past polls.

    Notices?