C# - Tree / Recursion in Get and Set Accessors? -

-

i have tree (a list<t>) contains number of itemtype classes (see code below); class has properties overridediscount (which null, indicating use defaultdiscount (which null, indicating use parent itemtype's calculateddiscount))

so see need recurse tree (which incidentally list<itemtype>) parent's calculateddiscount, because null, means need parent's parent's calculateddiscount , on...

is bad idea put code in get accessor?

how handle it?

just sidenote, data comes via sqldatareader database in no particular order, after children property list populated looping through tree , adding children list appropriate. parents unaware of children until after set accessor has been called, ruling out putting useful in set accessor (e.g. setting children's calculateddiscount in set accessor). unless i've missed other way of doing (very possible, recursion fries brain sometimes).

thanks in advance

the class far:

    public class itemtype     {         public int id;         public int? parentid;         public list<itemtype> children;          public double? defaultdiscount;          public double? overridediscount;          public double calculateddiscount         {                         {                 if (overridediscount != null)                 {                     return (double)overridediscount; //+ autospec qty                 }                 else                 {                     if (defaultdiscount != null)                     {                         return (double)defaultdiscount;                     }                     else                     {                          //i need itemtype's parent's discount                          //here recursing tree...is bad idea?                     }                 }             }         }     }

instead of storing id of parent item, store complete object. make lot easier (i convert public variables properties):

public class itemtype {     public int id { get; set; }     public itemtype parent { get; set; }     public list<itemtype> children; { get; set; }      public double? defaultdiscount { get; set; }     public double? overridendiscount { get; set; }      public double calculateddiscount     {                 {             return (double)(overridendiscount ??                              defaultdiscount ??                              (parent != null ? parent.calculateddiscount : 0));         }     } }

Comments

Post a Comment

Popular posts from this blog

Javascript line number mapping -

-
magically formatted comments change reported line number of javascript errors in browsers; this: //@line n "f" n line number , f file name. unfortunately, //@line appears ungoogleable. know there documentation on feature, , browsers support it? (i found references here , here .) from can find available in mozilla based browsers. it using js_setoptions command can turn these options on or off depending on values passed. https://developer.mozilla.org/en/js_setoptions
Read more

c# - Is it possible to remove an existing registration from Autofac container builder? -

-
something along lines: builder.registertype<mytype>().as<itype>(); builder.registertype<mytype2>().as<itype>(); builder.deregistertype<mytype>().as<itype>() var container = builder.build(); var types = container.resolve<ienumerable<itype>>(); assert.istrue(types.count == 1); assert.istrue(types[0].gettype == typeof(mytype2)); scenario: go through bunch of assemblies , go register types want make sure have 1 implementation of given type. need before create container. track on own nice if autofac me bit. this cannot done directly using containerbuilder , unless start on new one. mind you, having first built container should able construct new container filtering away unwanted types , reusing registrations first container. this: ... var container = builder.build(); builder = new containerbuilder(); var components = container.componentregistry.registrations .where(cr => cr.activator.limittype != typ...
Read more

php - Mysql PK and FK char(36) vs int(10) -

-
i have read mysql can handle indexes , searches better if tables keys integers rather char(36) uuid's. is worth converting int(10)? note: use 1 server , have have plans use multiple databases concurrently therefore removing 1 of big reasons using uuid. our tables innodb if makes difference. thanks in advance. usually rdbms can handle integer keys pk more efficient, other datatypes. reason how build index column, yes: long dont require string (or other typed) keys, should use integers. however: char(36) , int(10) far away being equal, because int(10) much smaller, char(36). dont know, if require many different keys, should keep in mind. update, complete last paragraph: int(10) 32-bit, char(36) 36 - ^byte^ (= 288-bit). not mean, int consumes less space, means, char(36) has 4 times more different keys.
Read more