Lua table question ?

[Neolitik]

hello ,

i'have a question , i m a noob in lua , it' s a terrible language !

exemple :

Code: Select all

Add=function(self)
	table.insert(self.Bul,	{x=Me.x,
				         y=Me.y})
end,
	
Update=function(self)
	table.foreach(self.Bul,    i want  make here Bul.y=bul.y+2) 
end,

i dont know how i can increment y of my table with table.foreach()
if there are any solution ?

thank for all !

[Sardtok]

First of all, you're not supposed to use table.foreach (it's deprecated, and is going to be removed from Lua).
You might want to have a look at:
http://lua-users.org/wiki/ForTutorial

So something like this:

Code: Select all

for key,bullet in pairs(selv.Bul) do
bullet.y = bullet.y + 2
end

I've never coded Lua, so I'm not 100% sure about the above code.
And I'm also guessing that Bul is short for bullet, but you can call the key value pairs whatever you want.

PS:
WTF? No += operator in Lua?

[Robin]

Mind if I clean up a bit code of both of you? I think having good code here will only help Neolitik and other Lövers.

Code: Select all

function Me:Add()
   table.insert(self.Bul,   {x=self.x,
                     y=self.y})
end

function Me:Update()
   for key,bullet in pairs(self.Bul) do
      bullet.y = bullet.y + 2
   end
end

Disclaimer: I may be horribly wrong about this...

[Neolitik]

thank a lot !


i m understand now "pairs" . It s ok.
i' old qbasic programmer lol , lua is amazing ! Love more !

Code: Select all

	Update=function(self)
		    for key,B in pairs(self.Bul) do
     	 	if B.y < 10 then
     	 	table.remove(self.Bul,key)
     	 	end
     	 	B.y = B.y - 2
   		end

Code used here :