How do you read from a file?

[deadsource]

Hey. How do you read form a file in Love? Quite a newbie question but I just can't figure it out. Also tried searching but didn't seem to find an answer.
An example how to read a file into a two dimensional array would be nice

[Azhukar]

You can directly load lua files and use those as data storage.

main.lua

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local level1 = love.filesystem.load("level1.lua")()
print(level1[2][1]) --prints 2

level1.lua:

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local leveldata = {
	{1,1,1,1},
	{2,0,0,1},
	{1,1,1,1},
}

return leveldata

[deadsource]

Well it seems I didn't search hard enough. Thanks

[Automatik]

You can directly load lua files and use those as data storage.

main.lua

Code: Select all

local level1 = love.filesystem.load("level1.lua")()
print(level1[2][1]) --prints 2

level1.lua:

Code: Select all

local leveldata = {
	{1,1,1,1},
	{2,0,0,1},
	{1,1,1,1},
}

return leveldata

Bad idea. If the user download the file from an untrusted source, it might contain malware.
I think you should do this, if you want to get the raw text from a file:

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text = love.filesystem.read('level.txt')

If you want to put more complicated stuff like arrays, you can use Json( http://json.luaforge.net/ ) to transform text into objects and vice versa.(Json can't contain code)

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object = json:decode(love.filesystem.read('level.json'))

level.json

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[
[0,0,0,1],
[0,1,0,1],
[0,2,0,1],
[1,1,1,1]
]

[Azhukar]

Bad idea.

No.

If the user download the file from an untrusted source, it might contain malware.

Yes.

[Automatik]

No.

Ok, sure, if you don't plan on putting a level editor or custom levels or anything like that, it's a fine option.

[Azhukar]

Ok, sure, if you don't plan on putting a level editor or custom levels or anything like that, it's a fine option.

Even if you do. It's simple to sandbox a lua chunk.

[Robin]

On the other hand, you can still get stuck in an infinite loop, even with sandboxing.

[slime]

On the other hand, you can still get stuck in an infinite loop, even with sandboxing.

http://lua-users.org/lists/lua-l/2013-01/msg00287.html seems pretty solid.

[kikito]

I will leave this here in case it is useful...

https://github.com/kikito/sandbox.lua