tab2file

tab2file = function(tab,path) -- using: tab2file(t, "file") where t is a table with values, "file" is file name
  local f = fs.open(path,"w")
  for k,v in pairs(tab) do
    f.writeLine(k.." = "..v)
  end
  f.close()
end

file2tab = function(path) -- using: t = file2tab("file") where t is a table to store all values, "file" is file name
  tab = {}
  local f = fs.open(path,"r")
  local s, k, v
  while true do
    s = f.readLine()
    if s == nil then break end
    _,_,k,v = string.find(s,"^%s*([_%w]+)%s*=%s*([_%w]+)")
    -- ^ is a "start of the line" character
    -- (if there are any other characters like # in target string, it won't work. Use it for comments.
    -- %s* is any amount (or zero) of space characters
    -- [_%w]+ is any amount or alphanumeric characters and/or "_"
    -- () represent a capture of this
    if k ~= nil then -- if it isn't a blank string, or comment, or something else
      tab[k] = v
    end
  end
  f.close()
  return tab
end