Lua chatbox

[Bearbear76]

Still not work @Ølsken

Is the flag an animation or static?
If static you forgotgetFrame([number]).

So

Code: Select all

flag1 = Draft.getDraft("Aosflag4"):getFrame(1)
-- or
Drawing.drawImage(flag1:getFrame(1), x, y)

An animation it works well if i exclude the rank condition but i dont want it to be like that

Ah I see City.getRank() returns 2 values (https://doc.theotown.com/modules/City.html#getRank)

This is why it doesn't work rank is a draft

Code: Select all

rank = City.getRank() -- returns first value

--> rank: draft = [draft]

Try out one of these:

Code: Select all

_, rank = City.getRank() -- returns draft for "_" and number for "rank"

--> _: draft = [draft]
--> rank: number = [number]

Code: Select all

rank = select(2, City.getRank()) -- returns second value

--> rank: number = [number]

[Lobby]

@rjroldan1

I'd say more like that:

Code: Select all

local _,rank

function script:update()
  _,rank = City.getRank()
end

• You have to define rank as local outside of script:update() if you want to use it in another function (it's nil there otherwise)
• City.getRank() does return the rank index as second return value, therefore the strange variable _ here

[Hadestia]

@rjroldan1

I'd say more like that:

Code: Select all

local _,rank

function script:update()
  _,rank = City.getRank()
end

• You have to define rank as local outside of script:update() if you want to use it in another function (it's nil there otherwise)
• City.getRank() does return the rank index as second return value, therefore the strange variable _ here

This really answers my questions

[Hadestia]

So if i don't include "_," thing, my variables turns to global variable?

[ian`]

Wait, what the rank and new lua functions is available on older version than 1884?

[Bearbear76]

So if i don't include "_," thing, my variables turns to global variable?

Anything that doesn't have local in front of it is a global value in Lua.
_ is just a variable name like rank since Lua allows alphanumeric and _ for variable names (cannot start with a number though)
_ in Lua is a common placeholder variable. (usually a variable you won't use)
You can use whatever as long as it sounds like it's going to not be used like:

• ghost
• blackhole
• temp
• junk

If you're working on the code by yourself use whatever you want get creative (as long as you can tell what it is).
But, make you won't go "hmm what is stardust??" after revisiting your code after a week or so.
If you're working with a group using _ might be a better idea.

Code: Select all

magic_number = 12 -- ok
_LUARESERVED = "dont write like this Lua uses this" -- ok
base64 = "QmVhcmJlYXI2NQ==" -- ok
8bit = "00001100" -- error: malformed number near '8b'
$name = "Olsken" --error: unexpected symbol near '$'

So any variables after local will be declared as a local value

Code: Select all

local x, y, z = 1, 2, 3

--> local x: number = 1
--> local y: number = 2
--> local z: number = 3

Also try to avoid global values as much as possible!

[Bearbear76]

Wait, what the rank and new lua functions is available on older version than 1884?

yes, If I understood correctly.

[Lobby]

No, the new Lua functions (like City.getIncome()) are only available with version 1.8.84 and newer. However, City.getRank() does exists for a while, now

[Hadestia]

So if i don't include "_," thing, my variables turns to global variable?

Anything that doesn't have local in front of it is a global value in Lua.
_ is just a variable name like rank since Lua allows alphanumeric and _ for variable names (cannot start with a number though)
_ in Lua is a common placeholder variable. (usually a variable you won't use)
You can use whatever as long as it sounds like it's going to not be used like:

• ghost
• blackhole
• temp
• junk

If you're working on the code by yourself use whatever you want get creative (as long as you can tell what it is).
But, make you won't go "hmm what is stardust??" after revisiting your code after a week or so.
If you're working with a group using _ might be a better idea.

Code: Select all

magic_number = 12 -- ok
_LUARESERVED = "dont write like this Lua uses this" -- ok
base64 = "QmVhcmJlYXI2NQ==" -- ok
8bit = "00001100" -- error: malformed number near '8b'
$name = "Olsken" --error: unexpected symbol near '$'

So any variables after local will be declared as a local value

Code: Select all

local x, y, z = 1, 2, 3

--> local x: number = 1
--> local y: number = 2
--> local z: number = 3

Also try to avoid global values as much as possible!

Its basically like java custom variable rule

[Hadestia]

Anyway i add new function to call before it initiate the condition , hope this work

Screenshot_20200621-204754.png

[Lobby]

Code: Select all

...
local _, rank, var2

function script:update()
  _, rank = City.getRank()
end

local var = function()
  var2 = rank * 1
end
...

I you define a variable as local in a function it won't be accessible from outside of that function

[Hadestia]

Code: Select all

...
local _, rank

function script:update()
  _, rank = City.getRank()
end
...

I try this but it gives me an issue that like "expected 'then at line (where the condition are) " even it has already

[Lobby]

Yes, because your var2 was also declared as local within a function

[Hadestia]

Yes, because your var2 was also declared as local within a function

Im clueless what should i do

[Lobby]

Please upload your whole code as text so I can edit it

[Hadestia]

Please upload your whole code as text so I can edit it

Together with json?

[Hadestia]

Code: Select all

local flag1 = Draft.getDraft("AoSflag1") 
local flag2 = Draft.getDraft("AoSflag2") 
local flag3 = Draft.getDraft("AoSflag3") 
local flag4 = Draft.getDraft("AoSflag4") 

function script:update() 
local rank = City.getRank()
end

local var = function ()
 local var2 = rank * 1
end

function script:draw(tileX, tileY) 
Drawing.setTile(tileX, tileY, 17, -40) 
Drawing.setColor(255,255,255) 
Drawing.setAlpha(1.0) 

var()
 if rank1 == 0 then 
   Drawing.drawImage(flag1) 
 elseif var2 == 1 then 
   Drawing.drawImage(flag2)
 elseif var2 == 2 then
   Drawing.drawImage(flag3)
 elseif var2 == 3 then
  Drawing.drawImage(flag4)
 end 
Drawing.reset() 
end 
 

Here lobby sorry i think im lacking of IQ maybe it because of sodium foods

[Hadestia]

Code: Select all

...
local _, rank, var2

function script:update()
  _, rank = City.getRank()
end

local var = function()
  var2 = rank * 1
end
...

I you define a variable as local in a function it won't be accessible from outside of that function

Oh ok i get it this is just like getting the 2nd return info. To store at second variable

[Bearbear76]

Hmm a lot of misplaced locals.

Local variables are local to their block no one can access them outside.
These are the basic blocks:

Code: Select all

if condition then
  -- If block
end

for i = 1, 100 do
  -- For block
end

while condition do
  -- While block
end

function foo()
  -- Function block
end

For example:

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local a = 12

if condition then
  local b = 13
end

local c = 20
function foo()
  c = 50
end

--> local a: number = 12
--> nil
--> local c: number = 50

As you can see the variable b cannot be accessed because it's only visible to it's own block (if statement).
But we can see c as it was declared outside of any block, though it was re-declared inside a block it still is local to the original declaration.

[Hadestia]

It works well now Thanks for your help also

Hope this conversation would help others too