Math Is Fun Forum

i already asked this question on stackoverflow and accepted an answer i think i did not really understand the answer and i got some more question, im embarrassed to necro it so im posting it here

im learning lua and got to metatable part, in this example

 local tb = {}
local meta = {}

function tb.new(s)
local super = {}
super.s = s

setmetatable(super,meta)

return super
end

function tb.add(s1,s2)

return s1.s..s2.s

end

meta.__add = tb.add

f= tb.new("W")
t= tb.new("E")

print(f+t)

when compiler gets to

 f = tb.new("W") 

i think this happens

 function tb.new("W")  super.W = W return super end 

so

print(f+t) 

looks like

print(super+super) 

how does

 tb.add(s1,s1) 

find the fields of super table using

 return s1.s..s2.s

also as the

 tb.new

function is called twice and

setmetatable(super,meta) 

happens twice is there any difference between the first and second iteration? if any of the above are incorrect please correct me.

i have thought for a while and found my mistake in the first step when i did 16/7 i placed 2 on top of 1.why is 2 placed on top of 6? bc its a 1 digit number so we place it on ones place which is 6? pls correct me if im wrong