declare global variable inside of functions? Thread - TrAInsported

ok, my code looks like this:

function ai.init(map,money)
   map1=map
   ---more script
end

for i=1, map1.height, 1 do
   ---some script
end

Now the error is, that map1 is only a local variable, and the error says, that 'map1' is a nil value.

Is there a way to bring the map variable outside the functions?

If i later do a

function ai.enoughMoney(money)
	buyTrain(random(map.width),random(map.height))
end

it works perfectly without an error, but why?

The way you declare it, map1 is a global value, just like you want it to be. The error is not in the creation but, if I see it right, then the for loop isn't just outside the ai.init function - it's outside of ALL functions.

If you have code outside of functions that code will be run when the file is first loaded, which happens before ai.init is called. This means that the for loop will be run when map1 is still unknown to Lua.

So make sure the for loop is inside a function (any function should do, as long as it's not called before the map1=map line is being run.
Example:

function ai.init(map,money)
   map1=map
   ---more script

   for i=1, map1.height, 1 do
      ---some script
   end
end

Or:

function ai.init(map,money)
   map1=map
   ---more script
end

function ai.chooseDirection()
   for i=1, map1.height, 1 do
      ---some script
   end
end

ah, i can see. Hm, i thought, when I could do my maths outside the function, I wouldn't fail at the time limit for ai.init()

ok, thank you for your answer

you can put the math in an extra function.

function doSomething()
do some math
end

yeah, but if i call a function from the ai.init(), the ai.init() will wait for my doSomething() function to end, so it still takes too long..

then you should think about optimizing
Or doing less stuff...

yea, guess I have to... thanks for the answer