global variable array problem

[drarem]

After I've initialized the array using a function, I can do this:

 

globals.myarray[1][1] = 0

 

and it works, but if I do this:

 

local fx=globals.reti

local fy=globals.retj

 

System:Print(...) ..

fx, fy are now equal to 1,1

 

This won't work:

globals.myarray[fx][fy] = 0

 

I get this error: 253 : attempt to index a nil value

 

What is going on?

 

thanks

[shadmar]

This will create a multi-dimensional array of 10 x 10 with every value set to zero:

 

myarray = {}
for f=1, 10 do
   myarray[f] = {}
   for g=1, 10 do
       myarray[f][g] = 0
   end
end

[drarem]

It's odd, that's what I have but when I access it in another function (after it has been initialized and called), then crashes with a 'nil' like it has gone out of scope. BUT if I hardcode the numbers, it works.

 

 

myarray[fx][fy] = 0 -- nil error

 

myarray[3][1] = 0 -- works

[macklebee]

We will probably need to see all of the code that initializes the array and then accesses it in another function to determine the problem. But if I had to guess is that you are setting the 'fx' & 'fy' variables local to a function other than the function you are accessing the array with so those are not defined in the access function. Again without seeing your full code example, its hard to troubleshoot.

[Genebris]

fx or fy is a nil value. Make sure you set them to numbers you need.

[drarem]

Many thanks, after thinking about the 'fx and fy' variables and some testing, I realized those were a string value instead of numeric. I converted them to a number using tonumber(fx) and tonumber(fy), and it works as expected.