cty41

https://stackoverflow.com/questions/19269545/how-to-get-a-number-of-random-elements-from-an-array

cty41

https://mattwarren.org/2016/12/14/Why-is-Reflection-slow/

cty41

https://poga.github.io/lua53-notes/introduction.html

cty41

local lfs = require('lfs')

local deletedir
deletedir = function(dir)
    for file in lfs.dir(dir) do
        local file_path = dir..'/'..file
        if file ~= "." and file ~= ".." then
            if lfs.attributes(file_path, 'mode') == 'file' then
                os.remove(file_path)
                print('remove file',file_path)

cty41

find . -exec touch {} \;

cty41

if next(myTable) == nil then
   -- myTable is empty
end