Reading a file

[onper]

Hi!

I have this small problem when reading the lines of a text document using the following code.

Code: Select all

for line in love.filesystem.lines("questions.txt") do
		if line ~= "" or line ~= "a" then
			table.insert(canvas_questions, line)
		end
		
		print(line) -- for debugging purposes
	end

The text file, as an example

Code: Select all

Raggadish

Dunadump
a
Ropperish

The problem is that the code adds the line to the table even if it contains an empty space or an a. I have a feeling that this could be caused by the "new line" unicode, but I haven't made any progress there, which I'm asking you to help me.

I know I can probably solve this by checking the line with a string function to see it's first character matches a etc.

Thank you for the help!

[Nixola]

Try

Code: Select all

if line ~= "\n" or line ~= "a\n" then

[Robin]

No.

Replace or by and.

If you do "a ~= b or a ~= c" (with b ~= c) then whatever the case, it always returns true. Think about it.

[Nixola]

...Right. Thanks, even if I'm not the OP

[onper]

Thanks for getting back with solutions so quickly!

It worked perfectly fine with replacing or with and, now I kind of feel stupid about that mistake...

[onper]

Another question while I'm at it

I'm a little experienced with Java and when you're increasing an int, you can type

Code: Select all

i++

While in lua you have to do

Code: Select all

i = i +1

is there some way to do it in lua like the java example?

[Petunien]

As far as I know there's no possibility to increment a number like in java or elsewhere.

You have to do:

Code: Select all

i = i +1

[Roland_Yonaba]

Well, it is not possible to do such a thing in Lua, by default.
But, you may use Meta...