How to load map from txt file

[Verfin]

I'm making this tilemap thingie when the problem struck me. I used this code to save the map

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for y = 1 , mapheight do
		file:write("\n")
	for x = 1, mapwidth do
		if x == 1 then
		file:write(map[x][y][0])
		else
		file:write("," .. map[x][y][0] )
		end
	end
end

and the text it generates looks like this: 0,0,1,4,2 etc...
So the problem is, how I can tell the program to read the items in the lines ie. read one item, store it to the map table read the next etc..
I'm so new to the lua

[Jasoco]

If you save it with the correct format for tables in standard Lua syntax:

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map = {
  { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
  { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }
}

You should be able to use:

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love.filesystem.load("map1.lua")()

To load it. The extra () at the end makes sure it's executed like Lua.

I think you can alternatively replace that map = with return and then just use

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map = love.filesystem.load("map1.lua")

Without the extra () at the end to return it as a table into a variable? Maybe? I haven't tested the second method.

[Ellohir]

Add a "return {" at the beggining and a "}" at the end. That way you can simply execute the file and get the matrix.

If you want to store it as a string I use this magic piece of code that I don't understand from kikito ( https://github.com/kikito/love-tile-tutorial/wiki ):

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    tileTable = {}
    local width = #(tileString:match("[^\n]+")) 
    for x = 1,width,1 do tileTable[x] = {} end

    local rowIndex,columnIndex = 1,1
    for row in tileString:gmatch("[^\n]+") do
      assert(#row == width, 'Map is not aligned: width of row ' .. tostring(rowIndex) .. ' should be ' .. tostring(tiles.w) .. ', but it is ' .. tostring(#row))
      columnIndex = 1
          for character in row:gmatch(".") do
              tiles.tileTable[columnIndex][rowIndex] = character
              columnIndex = columnIndex + 1
          end
       rowIndex=rowIndex+1
    end

It reads a string 'tileString' and makes it into a matrix 'tileTable'. It doesn't use commas, though.

[coffee]

Good help already but also my complete load/save routine could help

viewtopic.php?f=4&t=4582#p41171

[Taehl]

Or use TSerial, or LON / JSON... This kind of problem is called serialization, and you will find no shortage of solutions for it.

[Verfin]

Thank you for these replies! Guess I just had wrong keywords when I tried to search.

[waraiotoko]

You could save everything to a .lua file and just load it with the built in Lua functions.

EDIT: Nevermind, didn't read enough replies. TSerial seems like what you need.