Creating Lists, How many ways?

BlitzMax Forums/BlitzMax Beginners Area/Creating Lists, How many ways?

Amon	(Posted 2006) [#1]

How many ways are there of creating a list in Bmax?

Currently I'm using the following method:

Local OjectList:TList = CreateList()

I've seen code where a list is created but stored in a type. I hope I'm making sense.

I was wondering if storing the list in the type is better than creating it outside the type?

Type TObject
Field List:TList
etc..
etc..
End Type

I don't know how to get the second method of using lists working. How do you do it?

Regular K

(Posted 2006) [#2]

Type TObject
Global ObjectList:TList=CreateList()
...
End Type

That works.

Grey Alien

(Posted 2006) [#3]

I prefer:

Type TMyListWithKnobsOn extends TList
    Field blah
    Method foo()
    End Method
End Type

This way you can treat it just like a list with AddLast etc + you can add in your own extra commands. Maybe this isn't what you want but I use it in my framework for bullet and alien lists amongst other things.

Eric	(Posted 2006) [#4]

Grey,

Explain that a little more. Are you saying that just by extending TList.

I could...Using your example above

For Local Test:TMylistWithKnobsOn= Eachin MylistWithKnobsOn

Print Test.Blah

Next

or Maybe

For Local Test:TMylistWithKnobsOn= Eachin Self

Print Test.Blah

Next

Hmm...I'm going to have to test this.

Grey Alien

(Posted 2006) [#5]

Eric: hmm, sorta but not quite. To print blah (there's only one blah for the entire list!) you would just do this:

Local test:TMylistWithKnobsOn
test.blah  = 100
print test.blah

Or make a method in TMylistWithKnobsOn called print, and then call Test.Print() (this is better as you can alter it do what you want).

As for looping, well it depends what object you add to the list. For example:

Type TMyThing
    Field X
End Type

Local test:TMylistWithKnobsOn
Local A:TMyThing
A.X = 1
Local B:TMyThing
B.X = 2

test.AddLast(A)
test.AddLast(B)

'here's the loop
For temp:TMyThing = eachin TMylistWithKnobsOn
   Print temp.X 'tada!
Next

Although in the above example, it would be cool if you made a method in TMylistWithKnobsOn called PrintAll() and it could loop through the list and do the printing so in your maincode all you do is Test.PrintAll().

I haven't written the above in the IDE (I just typed it now) so hopefully the sytax is correct.