Lua Input Problem

Question

I'm new to the Lua I/O, but have been using Lua elsewhere for almost two years now. I have this line:

for line in io.lines("myfile.txt") do

but it always results in a "No such file or directory" error. "myfile.txt" is in the same directory as the Lua file.

Where should I put the file "myfile.txt"?

Alexander Gladysh · Accepted Answer · 2011-05-07 22:25:21Z

3

for line in io.lines(assert(io.open("myfile.txt"))) do

-- The lines function accepts a file in its argument, while on the other hand, open accepts a string and returns the file.

edited May 7, 2011 at 22:25

Alexander Gladysh

41.8k33 gold badges111 silver badges166 bronze badges

answered May 7, 2011 at 19:30

Blab

461 bronze badge

Sign up to request clarification or add additional context in comments.

2 Comments

pighead10 Over a year ago

Wait, now it gives me "Bad argument #1 - string expected, got userdata."

pighead10 Over a year ago

Nevermind - I used io.lines() and set the default input before with io.input("myfile.txt").

danday74 · Accepted Answer · 2015-07-23 10:53:58Z

0

I had same problem but fixed it with the following code - This code demonstrates iteration with io.open ...

function getHostnameFromHostFile(ip)
    local hostName = "unknown";
    local hostFile = io.open("/etc/hosts");

    for line in hostFile:lines() do
        if line and string.find(line, ip) then
            hostName = line:match("[a-zA-Z][a-zA-Z0-9]+");
        end
    end
    return hostName;
end

edited Jul 23, 2015 at 10:53

answered Jul 23, 2015 at 10:47

danday74

58.1k56 gold badges273 silver badges337 bronze badges

Collectives™ on Stack Overflow

Lua Input Problem

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related