A few more questions about Lua...

[spykr]

Hey all,
It's me. Again.
I'm having some trouble with tables. There's just something about them that I'm not getting. If y'all knew of any good tutorials for tables used in conjunction with for loops, please let me know.
Also, is using lua less RAM-efficient than compiling an EBOOT file using C/C++?
If so, how much?

Thanks for all the help, y'all,
spykr


(I just had to fit that smilie in here somewhere. Haha.)

[bumuckl]

Whats your Problem with tables?

white = Color.new(255,255,255)
table = {"h","a","l","l","o"}


while true do
for i=1, table.getn(table) do
screenrint(10,10*i,tabl e[i],white)
end
screen.flip()
screen.waitVblankStart()
end

[EminentJonFrost]

Originally Posted by bumuckl

Whats your Problem with tables?

white = Color.new(255,255,255)
table = {"h","a","l","l","o"}


while true do
for i=1, table.getn(table) do
screenrint(10,10*i,tabl e[i],white)
end
screen.flip()
screen.waitVblankStart()
end

Just gonna explain that a bit more.

table.getn(table)

That means the # of variables in table "table"

The For loop repeats the instructions for all the values starting from 1 to the number of variables in the table.

screen:print(10,10*i,table[i],white)

So it will print the 1st letter at (10, 10), then the 2nd letter at (10, 20) (see the "10*i" in the Y coordinate?), 3rd at (10, 30), so on.

The result will look like this:

h.........a.........l.... .....l.........o (pretend the periods aren't there)

[Judas]

Don't forget that tables can contain multiple dimensions and any type.

table = {}
table[1] = "First Entry In Table"
table[2] = 492.19

table[3] = {}
table[3][1] = "Table[3] is a table on it's own"
table[3][2] = Image.load("Image.png")

table[3][3] = {}
table[3][3][1]"As many dimensions as you want"
table[3][3][2] = Color.new(255,0,0)

table[3][3][3] = {}
table[3][3][1] = "They get confusing after they get so big though"
table[3][3][2] = table[2] * 42

-= Double Post =-
Oh, and yes, Lua usually takes up more RAM, as it's loading every function Lua can handle, even if you're not using it.

[TurtlesPwn]

http://lua-users.org/wiki/TutorialDirectory

[spykr]

Originally Posted by Judas

Don't forget that tables can contain multiple dimensions and any type.

table = {}
table[1] = "First Entry In Table"
table[2] = 492.19

table[3] = {}
table[3][1] = "Table[3] is a table on it's own"
table[3][2] = Image.load("Image.png")

table[3][3] = {}
table[3][3][1]"As many dimensions as you want"
table[3][3][2] = Color.new(255,0,0)

table[3][3][3] = {}
table[3][3][1] = "They get confusing after they get so big though"
table[3][3][2] = table[2] * 42

-= Double Post =-
Oh, and yes, Lua usually takes up more RAM, as it's loading every function Lua can handle, even if you're not using it.

Ah! now I see. I just couldn't get my mind around the concept for some reason. What I really needed is a multi-level table that contains the positions of each object to be printed to the screen.

And would it be worth it to rewrite my code in c/c++ for the extra RAM? Because I'm afraid that this program will take up too much of the mem.