11 replies to this topic

[Pyuu]

I've been in CC for a while now, but I've never really figured out where local variables can be accessed from.
Such as:

local A = 1

for i=1, 20 do
if A == 1 then -- Is A nil or 1?
blah()
end
end

function b () if A == 1 then
-- is A nil or 1?
end
end

function c ()
local B = 2
end
c()
if B == 2 then
-- Is B nil or 2?
end

It's quite a confusing mess honestly of where local variables can be called.

I've seen a few people do this:

local A = 1
function B ()
local A
if A == 1 then
-- A is 1?
end
end

It's confusing. Anyone got any good information about this?

[Lemmmy]

This may be a good read for you.

If you redefine a variable inside a function, it will of course keep its new definition within the scope of the function. For your final case, A will be nil, not 1.

[Dragon53535]

Tutorial

[Lemmmy]

Dragon53535, on 17 January 2016 - 01:39 AM, said:

Tutorial

I didn't know there was a scope tutorial here, that's definitely a good read too! I definitely recommend that Mayushii reads the PIL too, of course.

[Pyuu]

It's sad that the tutorial doesn't have more replies

[Lemmmy]

Yeah. Is there a master board for tutorials?

Edit: like an index of them.

Edited by Lemmmy, 17 January 2016 - 01:45 AM.

[Dragon53535]

Here In the spoiler

[Lemmmy]

We should have a better, more nicely formatted, easily findable and stickied post for it.

[Pyuu]

Lol there is a master board, but I haven't seen local variables in Ask a pro.

[Lemmmy]

I also just realised, the post you linked doesn't actually have anything regarding Lua programming in general.

[Dragon53535]

Yeah, it's more of a computercraft focused list.

[Lemmmy]

Dragon53535, on 17 January 2016 - 02:00 AM, said:

Yeah, it's more of a computercraft focused list.

I'll bring it to Forum Discussion.