[Question] How Do We Use Table.insert And Table.remove Correctly?

So, the title explain it i guess, but here's why i came with this question: I am currently making a touchscreen password(yup another <_</>).

--That's just for information


key = {}
  key.digit = {}
	key.digit[1] = {1; x; y}
	key.digit[2] = {2; (x * 2); y}
	key.digit[3] = {3; (x * 3); y}
	key.digit[4] = {4; x; (y * 2)}
	key.digit[5] = {5; (x * 2); (y * 2)}
	key.digit[6] = {6; (x * 3); (y * 2)}
	key.digit[7] = {7; x; (y * 3)}
	key.digit[8] = {8; (x * 2); (y * 3)}
	key.digit[9] = {9; (x * 3); (y * 3)}


-- Check for the mouse click position
local function checkPosition(btn, nmb)
  b = 1
  for a = 1, 9 do
	if mouseW == key.digit[b][2] and mouseH == key.digit[b][3] and btn == 1 then
	  mon.write("key pressed"..key.digit[b][1])
	  table.insert(password, key.digit[b][1])
	  mon.write("pass :"..tostring(password[nmb]))
   end
  b = b + 1
end
end

I am using it correctly?

If you need the rest of the code just tell me and i'll post it

Thx Crackroach

Reverse the variables in the function. The table you want to insert into is the first argument and the thing you're inserting is the second argument.

local sometable = {}
table.insert(sometable, "Index1")
table.remove(sometable, 1)
print(#sometable) --# Outputs 0

You can also specify an index to third argument. Then it will insert at that index and not the end.

Ok thanks to both of you.

key={
digit={
{1,x,y},
{2,x*2,y},
{3,x*3,y},
{4,x,y*2},
{5,x*2,y*2},
{6,x*3,y*2},
{7,x,y*3},
{8,x*2,y*3},
{9,x*3,y*3},
}
}

you might also want to form tables like this