Keeping an array/list-length

BlitzMax Forums/BlitzMax Programming/Keeping an array/list-length

eindbaas

(Posted 2006) [#1]

What's a good way of keeping an array (or a list of numbers) a given length? for example: i want to have a list of 8 numbers and when i add a new one, all entries should shift in place and the last one should be removed.

ListAddFirst seems to be a nice way to do this, but for removing the last item, i need a reference to that one and B3D-style (something like last:Item = last Item) doesn't seem to work in Bmax.

What's an efficient way to do this?

fredborg

(Posted 2006) [#2]

Type bob
	
	Global list:TList = New TList

	Field bla:Int

	Method New()
		
		list.AddFirst Self
		If list.Count()>8
			list.Remove list.Last()
		EndIf
		
		bla = Rand(0,100000)
		
	EndMethod

EndType


For Local k:Int = 0 Until 100
	Local b:bob = New bob
	Print "bobs: "+bob.list.count()	
Next

eindbaas

(Posted 2006) [#3]

thanks a lot, that is *exactly* the info i need.

another question arises: where could i've found the availability of functions like list.Remove and list.Last() myself? The list-section in the Bmax-IDE help doesn't seem to mention them at all. Or am i looking in the wrong place? (help>modules>lists)

fredborg

(Posted 2006) [#4]

If you look in the help, you will see it described in the TList type section. Actually there is a RemoveLast() method as well.

eindbaas

(Posted 2006) [#5]

thanks again. i assumed the elements in the tree-view were all that would be discribed in the full TList-page. overlooked the methods completely