Lets say I have menu.lua containing:

myName = "Tom';

I then use Director to go to screen 1 and want:

print(myName);

This will show nil. I can however use:

_G.myName = "Tom";

to set the variable in menu.

But why doesn't the first example work. I thought everything not local in lua went into _G?

In short, if I set: myName = "Tom'; on a file, why isn't it accessible forever by all other pages?

Thanks

Tom

a global variable declared inside a file is global local to that file... so if that variable is not declared in that file you should use _G to get the real global global. :)
is it confusing ?

this sample will give you a better idea

main.lua

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local file2 =require("file2")
--global variable a
a = 10
 
file2:fn1()
--prints 10 -- we din't set _G.a in fn1
print(a)
 
 
file2:fn2()
 
--prints 25-- we set _G.a in fn2
print(a)