LÖVE

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-- this is for import map to string
function map2string(maptable,typeser)
  local sz = ''
  for y = 0, map.height do
    local row = {}
    for x = 0, map.width do
      local c = typeser[maptable[x][y]]
      c = (c ~= nil) and c or ' '
      if not tostring(c):len() == 1 then
        error("non-ANSI character on:" .. x .. ',' .. y)
      end
      row[x] = c
    end
    sz = sz .. table.concat(row) .. '\n'
  end
  return sz
end
-- this is for import string to map
local x, y = 0, 0
for l in string.gmatch(love.filesystem.read(file), "(.-)\n") do
  for c in string.gmatch(l, ".") do
    if map_signloader[c] ~= "nil" and x < map.width+1 then
      map_level[x][y] = map_signloader[c]
    end
    x = x + 1
  end
  x, y = 0, y + 1
end