Lua: Variables stored in array

Question

I'm trying to iterate over many variables at once, which are stored in a long array. To initialise them, I'm using a loop which goes over each of them, setting every variable to 0. By default, e.g. using: array[count] = 0 it will only change the value of the table's index. How do I set this variable from inside the table, as in getting the variable stored inside and changing it, not just the table's value at the given index?

I didn't understand what are you talking about. Some examples? — Egor Skriptunoff
– Egor Skriptunoff, Commented Oct 11, 2017 at 7:02
There are no reference types in Lua like in, e.g. C++ int &a = b. So once you copy something into the table it “forgets” where it came from and loses every connection to the original variable. — Henri Menke
– Henri Menke, Commented Oct 11, 2017 at 9:35
@HenriMenke Oh, well then is there an alternative way to iterate over variables? — sirsnow
– sirsnow, Commented Oct 11, 2017 at 13:41
@EgorSkriptunoff I have a table like so: arr = { var1, var2, var3 }, and I can't set them with arr[1] = 0 — sirsnow
– sirsnow, Commented Oct 11, 2017 at 13:41

lhf · Accepted Answer · 2017-10-11 14:11:51Z

2

You probably want to store fields in a Lua table:

a = { current = 4, first = 2, last = 10 }

Then you can set

a.current = 6

and also traverse all fields:

for k,v in pairs(a) do
   print(k,v)
end

or clear them with

for k in pairs(a) do
   a[k]=0
end

answered Oct 11, 2017 at 14:11

lhf

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