How to get list of directories in Lua

Question

I need a list of directory in LUA

Suppose I have a directory path as "C:\\Program Files"

I need a list of all the folders in that particular path and

Answer 1

I don't like installing libraries either and am working on an embedded device with less memory power then a pc. I found out that using 'ls' command lead to an out of memory. So I created a function that uses 'find' to solve the problem.

This way it was possible to keep memory usage steady and loop all the 30k files.

function dirLookup(dir)
   local p = io.popen('find "'..dir..'" -type f')  --Open directory look for files, save data in p. By giving '-type f' as parameter, it returns all files.     
   for file in p:lines() do                         --Loop through all files
       print(file)       
   end
end