'PACI

if not tonumber(line) and not bAllLines then  return end

I've seen a similar function made like 2/3 years ago (can even tell you that some var names are equal), but yours seems better. Nice one

Just a tip.

if type(tonumber(line)) ~= "number" and not bAllLines then  return end

The tonumber() function tries to convert the arg into a number, if it can't do that, it'll return a nil value, so you can do this instead:

if not tonumber(line) and not bAllLines then  return end