lua hex <= => string

gistfile1.lua

function string.fromhex(str)
    return (str:gsub('..', function (cc)
        return string.char(tonumber(cc, 16))
    end))
end

function string.tohex(str)
    return (str:gsub('.', function (c)
        return string.format('%02X', string.byte(c))
    end))
end

is that a separate file to my lua file ? how can i attach that code please explain to me thanks

simple copy this piece code into your code

very nice !

good job!