File handling

[NightLitch]

Here is a little simple guide how to read / write / append to files

-------------------------------------------------------------------------------
-- Lua 5 File Handling Guide / By NightLitch
-------------------------------------------------------------------------------

--// Simple Reading File

function ReadFile(filename)
	io.input(filename)
	for line in io:lines() do
		-- todo code here
	end
	io.input()
end

--// Simple Create File and Write:

function CreateFile(filename)
	io.output(filename)
	io.write("what ever you want to be saved")
	io.output()
end


-- Diff. Mode functions

--// Append mode

function AppendToFile(filename)
	local file = io.open(filename, "a+") -- "a+"
	file:write("appending this text to file "..filename.."\r\n")
	file:write("continuing appending / writing text to file\r\n")
	file:close()
end

--// Read mode

function ReadFromFile(filename)
	local file = io.open(filename, "r") -- "r" read
	for line in file:lines() do
		-- todo code here
	end
	file:close()
end

--// Write mode

function WriteToFile(filename)
	local file = io.open(filename, "w+") -- "w" write
	file:write("write stuff to file...")
	file:close()
end

-- reference:

local file_to_read = io.input(filename)  -- file is the file handler
for line in file_to_read:lines() do -- use created file handler to lines()
end
file_to_read:close() -- use created file handler to close file

local file_to_write = io.output(filename) -- file is the file handler
file_to_write:write("string to write") -- use created file handler to write
file_to_write:close() -- use created file handler to close file

Cheers / NL

[Herodes]

very hlpfl nl .. good going .. ;)

[bastya_elvtars]

Thx, NL, you made my white areas colourful. :)

[UwV]

" i was looking but this, but i forgot to look here.. "
  almost posted a request for this how to ..

 so thanks again..

[bastya_elvtars]

function savefile(table,file)
[color=#FF0000]--	io.output(file)
--		for a,b in table do
--			io.write(a.."\n")
--		end
--	io.output()[/color]
	local f=io.open(file,"w")
		for a,b in table do
			f:write(a.."\n")
		end
	f:close()
end

The red part did not write content to files that were already created. Is this normal?

[Dessamator]

function savefile(table,file)
        io.output(file)
	for a,b in table do
		io.write(a.."\n")
                 [COLOR=blue] io.close()[/COLOR] 
	end
	io.output()
end

indeed its normal when u forget to close the file, i.e add the line in blue

[bastya_elvtars]

Originally posted by Dessamator

function savefile(table,file)
        io.output(file)
	for a,b in table do
		io.write(a.."\n")
                 [COLOR=blue] io.close()[/COLOR] 
	end
	io.output()
end

indeed its normal when u forget to close the file, i.e add the line in blue

Damn, ok thank you, I haven't done scripting for 2 months and never knew LUA5 very well... thx for helping me out... :)

[Dessamator]

ur welcome, i dont know lua 5 that well either, just learnt it by "trial and error":)