table[1]=a and table:1=a

[sintwins]

What is the difference between these do they do the same thing? For example what would another way of doing this be?

NPC:Spawn()

[Overv]

Other ways of doing the above:
[lua]NPC.Spawn( NPC )
NPC["Spawn"]( NPC )[/lua]
: simply means the object before the : is passed as the first argument.

[sintwins]

Ok thanks. So self:spawn is the same as spawn(self)?

[Overv]

No, that would be the same as self.spawn( self ).