NewsForumsCodeLogsGallerySpecsSearch

Something like Dynamic List ?

Monkey Forums/Monkey Programming/Something like Dynamic List ?

Darky(Posted 2013) [#1]
Hello :)

I write my first game in monkey and stuck on a problem ...

i need to create a custom Type/Structure like this.... :
Class Character
 Field X:Int
 Field Y:Int 
end class


Now i would to create a list of characters and access this :
Global Chars:List<Character>

How i now add Items to this list... is this possible ?

like this ...


T:Charater = New Character
 Character.X=10
 Character.Y=20
Chars.AddLast T


Is this possible anyway ?


Xaron(Posted 2013) [#2]
Sure. First you have to create that new list (because you only have the declaration done but no instance of that list object yet!):

Chars = New List<Character>


Then you can create your characters and add them:

Local c:Character = New Character()
c.X = 10
c.Y = 20
Chars.AddLast( c )



Darky(Posted 2013) [#3]
Wow! Thanks :D

I Love Monkey ;P Really Powerfull !


Can i Place a method in the Class for Scanning for the highest ?

like this ...

 Class Character
 Field X:Int
 Field Y:Int 

 Method FindHighest()
  ' ... Here Scans the List for the Highest X or something...
 end method 
end class


what i mean is ... can i crawl the list from out the class self ?

thats where very nice :D


rIKmAN(Posted 2013) [#4]
Use EachIn to iterate through the list, and return the highest value found once you've gone through the whole list.


ziggy(Posted 2013) [#5]
what i mean is ... can i crawl the list from out the class self ?

Yes:
Class CharacterList Extends List<Character>
   Method FindHighest:Character()
      For Local Ch:Character = EachIn Self
         '''do comparison etc here, store the highest
      Next
      ''' return the result of the find operation
   End
End

That's how object oriented works. Need a list that has to do something special? Get the list class, and extend it with the functionality you need
Now:
Global Chars:CharacterList
Chars = New CharacterList



Darky(Posted 2013) [#6]
uhhh great thanks .... i seee i have a much to learn in monkey =) ( coming from purebasic :-/ )

Wow and i see ... OOP is really very powerfull ;D


Darky(Posted 2013) [#7]
:(

Dont unterstand ...


Class My
	Field Y:Int
	
	Method New(y:Int)
		Y=y
	End 
End 

Class xMy Extends List<My>
	Public Method PrintMe:My()
		Print Self.Y
	End Method 
End Class

'Global A:List<My>=New List<My>
Global A:xMy=New xMy
Global c:My


Function Main()
	A.AddLast(New My(22))
	A.AddLast(New My(33))
	A.AddLast(New My(13))
	For c = Eachin A
		c.PrintMe()
	Next 
End



whats wrong ? :-/


Jesse(Posted 2013) [#8]
I can easily give you the answer but I rather make you think about it.

does class "My" have a method PrintMe?

doe the class "xMy" have a "Y" field?

in your case "List<My>" allows you to store " abjects of "My" to "xMy" class(extended List).

in order to access the objects from the "xMy"(extended List) in your case you use the For/EachIn so the objects to access are of type "My" that you now placing in "c" but "My" does not have a method "PrintMe" so why are you trying to access "PrintMe" from a class that does not contain the method "PrintMe"?

class "xMy" does not have a "Y" field so when you use "Self.Y" you are saying to access the variable(Field) Y from the class "xMy" but xMy does not contain a variable(Field) Y. Think it through and see if you can figure it out.

also public and private are not part of methods or functions they just separate public code from private code. you can use one Public for all of your Public methods and functions with in a class and one Private for all of your private methods and functions with in a class. I sugest it's best not put it in the same line with a method.


Samah(Posted 2013) [#9]
Darky, I think this is what you're trying to do:
[monkeycode]Class My
Field Y:Int

Method New(y:Int)
Y=y
End

Method PrintMe()
Print Self.Y
End
End

Global A:List<My> = New List<My>

Function Main()
A.AddLast(New My(22))
A.AddLast(New My(33))
A.AddLast(New My(13))
For c := Eachin A
c.PrintMe()
Next
End[/monkeycode]
You don't need to extend List in this situation because you're adding functionality to My, not List. Also notice the colon I added in the For statement. This tells Monkey that you want the variable c to be declared as whatever type of object is in A (in this case, My).



@Jesse: ...you can use one Public for all of your Public methods and functions with in a class and one Private for all of your private methods and functions with in a class...

You can use multiple. I normally do that to separate fields and methods.
[monkeycode]Class Foo
Private
' private fields
Public
' public fields
Private
' private methods
Public
' properties
' constructors
' public methods
End[/monkeycode]