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Why don't I see cleanup class?
Message
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Divers
Thread ID:
00671062
Message ID:
00671148
Vues:
16
Hi Nick,
One other thing that a Cleanup Class does:
If there is an error between "Set Talk On/Off" and "Set Talk &lcTalk", the settings don't get reset, if your On('Error') routine does "Return to Master" or something similar.
With the Cleanup Class, when "Return to Master" is issued the local variable goes out of scope triggering the Destroy() which cleans up.


>And then I need to remember the name of this class, how to call it, etc. What if somebody wants the class which sets/restores TALK ON instead of OFF? Create another class, or add two methods to SETTALK class (or one method and pass the parameters), remember methods names, etc... Sure you can do things this way, but for such simple cases, IMHO, it is not worth it. But that's just me... :)
>
>>Hi Nick,
>>The advantage is: you don't have to remember to cleanup. When the procedure/method ends, the variable goes out of scope and the destroy() cleans up for you.
>>
>>>I personally do not see very big advantages in having the class for such cases. Those 3 lines are clear and self-sufficient. You will replace them with two lines. What's the big deal? :)
>>>
>>>>Every time I see code written by someone else I always see things like:
>>>>
>>>>Procedure ??
>>>>  lcTalk = Set('Talk')
>>>>  Set Talk Off
>>>>  .........
>>>>  Set Talk &lcTalk
>>>>EndProc
>>>>
Bill Morris
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