Code: [Select]

Bar = class(Foo)
So this will also call Foo:init() after it assigns the table of Bar? That's interesting.

No, this is not what I've written :

What's the difference then ? Foo() will call Foo:init() after the copy (the constructor).

class() does not call init().

@adriweb: Yeah I've seen it, I understand the actual definition even less. Sorry.
http://ourl.ca/11717/354363

@Levak: Yeah I don't know what I was going on back there.  We were looking at
foo = Foo()
and
Bar = class(Foo)

EDIT: I changed some things because I changed my understanding...

Quote from: Jonius7 on July 29, 2013, 08:45:42 am

So clarification,

Code: [Select]

ball = class() -- creates a class called ball using the class function that is predefined
function ball:init(speed, size) -- initialises the class, it can be called by just ball() elsewhere in the code
   self.speed = spd -- these are added to the table, ball?
   self.size = size
end


Yes (and it's 'speed' not 'spd').

I am so confused, which parts in initialising self.blah variables have to match the arguments? In this case, speed and size? I thought only the blah part in self.blah had to match the arguments.

I thought there was no restrictions, i.e. doing this wouldn't give any errors when executing the code.

Taking some code from my (currently) secret project

function Units:init(plr, x, y, str, move, opt) -- player, xy position on map, strength, movement, options
self.plr = uplr
self.x = ux
self.y = uy
self.str = ustr
self.move = umove
self.opt = {}
end
Is this valid at all? EDIT OVERRIDE: No, it is not valid code. I think because uplr, ux, uy aren't defined? Hence self.plr, self.x sel.y ... are assigned values of nil. That's why I'm not getting an error, even when calling the function. It's only when I tested trying to gc:drawstring() ustr that it got a nil error.

So if I just change it to

function Units:init(plr, x, y, str, move, opt) -- player, xy position on map, strength, movement, options
self.ran = plr
self.dom = x
self.hah = y
self.yea = str
self.ble = move
self.see = {}
        self.new = 10
end
That would be valid, except I probably wouldn't name those self. variable like that, of course

I'm still not sure what all these things do. And what would be the output if I were to call Units and/or Units() ?

I'm also using this to get my head around it as well: http://ourl.ca/12291/231625

As said on my custom title: whyda slow progress in programming? Imma struggle beyond basic concepts...

Yep I edited my posts and talked about the uplr, because uplr hasn't been defined yet.
I edited my post several times, so I may have started to answer my own questions

your parameters must be equil to your variable.

as in? The arguments in the function?

I really don't understand why you're struggling with scoped-variables-overriding.

What I mean :
local foo = 42
{ -- new scope, it can a function, for, while, etc ..
    local foo = 69
    print(foo) -- prints 69
}
print(foo) -- prints 42
Is that a new concept for you ?

Because here, "self" is the object itself, it won't colide with current scope variables.

Thus, this is valid :
Foo = class()
function Foo:init(x, y, z)
  self.x = x
  self.y = y
  self.z = z
end

And this is invalid :
Foo = class()
function Foo:init(xx, yy, zz)
  x = xx
  y = yy
  z = zz
end


But obviously, this is also valid :
Foo = class()
function Foo:init(xx, yy, zz)
  self.x = xx
  self.y = yy
  self.z = zz
end


wheneva i lookz at someone'z lua source code it haz a bunch of trigz and I'z juz like omgz what the crudz doez all this meanz it'z so weirdz
No spamming/trolling intended, I just want to know why you'd wanna use trig in a lua code. I'm not very skilled at programming (YET). Someday, I wanna be the very best. That no one ever was. But anyways, no spamming/trolling intended.

Yes I'm guessing that trigonometry is essential if I want to learn to program games. I learned basic trig in Geometry, how can I apply that to programming? It's something I've been wondering for a very long time, as i want to program my first game in lua, on the nspire.
EDIT:
Not actually ON the nspire, just for it.

Trig is necessary for everything that involves rotation or turning.