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Re: OOP: How to construct multiple instances of a class at once

by sundialsvc4 (Abbot)
on Nov 14, 2012 at 16:52 UTC ( #1003859=note: print w/replies, xml ) Need Help??

in reply to OOP: How to construct multiple instances of a class at once

When dealing with situations like this, I like to make my objects “lazy.”   They don’t actually fetch information unless and until they have to.   One strategy is to send the constructor a hashref of known-good data that you might have obtained from the current row in your query; certain keys are obligatory.   The (trusting...) object initializes itself partially with them ... suspiciously checking the values, and using the “setters” if such things exist so that all necessary side-effects take place.   But it knows that it hasn't done all of the fetching that it might conceivably need to do ... and, if the need to do so never arises, it never will.   “Lazy.”   Therefore, efficient.

Your “list of users” is, initially, just a list of blessed-hashes.   But they are all smart enough to know when, and if, and what, additional information must be obtained or manipulated to do everything that they are designed by you to do.

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[marto]: good morning all
[Corion]: Hi marto!
[Corion]: The fun show at $work continues, as The Big Project is now in its second week of frantic live-bugfixing and weekend releases where nobody knows what went live. Nothing has been tested anyway.
erix mutters cantankerously under his breath
Corion watches from the sidelines. Or rather, from behind, as my system only gets output from that process and my programs adhere strictly to the GIGO design principle.
[erix]: ah, that's nice to hear Corion :)

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