Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>The best solution for the situation I found is to use a Double-Dispatch/Visitor pattern. I describe a situation where base class A is abstract, and concrete classes B and C inherit from A. Also, by making the DoBehavior method in the base class A abstract, we are forcing ourselves to make an implementation for it wherever we would need it, so if we expand this to add more types, we won't forget to add it's DoBehavior methods (seems unlikely that one would forget, but this behavior may be insignificant to the rest of the new type you add, and may be overlooked - especially if there are many of these behavior patterns)</p> <pre><code>interface IVisitor { void DoBehavior(B item); void DoBehavior(C item); } abstract class A { abstract void DoBehavior(IVisitor visitor); } class B : A { override void DoBehavior(IVisitor visitor) { //can do some internal behavior here visitor.DoBehavior(this); //external processing } } class C : A { override void DoBehavior(IVisitor visitor) { //can do some internal behavior here visitor.DoBehavior(this); //external processing } } class Manager: IVisitor //(or executor or whatever. The external processing class) { public static void ProcessAll(List&lt;A&gt; items) { foreach(A item in items) { item.DoBehavior(this); } } void DoBehavior(B item) { } void DoBehavior(C item); { } } </code></pre> <p>Thanks for contributing, everyone. Learnt a lot and got some good ideas from you all (it's worth it to read all the answers if you face a similar situation).</p>
    singulars
    1. This table or related slice is empty.
    1. POOptimally and elegantly performing certain behaviors based on types in a hierarchy
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USDenzil
    1. USDenzil
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POOptimally and elegantly performing certain behaviors based on types in a hierarchy
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. CONote you can mark your own answer as the best answer :)
      singulars
      1. PO
      1. USJulien Lebot
    2. COI can only do that in 2 days for some reason. Thanks though. Following on what you did and reading up really helped me get to this final solution, and your own solution and earlier mistakes solidified my understanding of method overloading and OOP in general.
      singulars
      1. PO
      1. USDenzil
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload