function split(s, delim)

    if type(delim) ~= "string" or string.len(delim) <=  then

        return

    end

    local start =

    local t = {}

    while true do

    local pos = string.find (s, delim, start, true) -- plain find

        if not pos then

          break

        end

        table.insert (t, string.sub (s, start, pos - ))

        start = pos + string.len (delim)

    end

    table.insert (t, string.sub (s, start))

    return t

end