Simple separator/explode function for Lua

String separator.lua

function explode(input, separator)
	if input:len() == 0 then return {} end
	if input:len() == 1 then return { input } end
	separator = type(separator) == "string" and separator:sub(1, 1) or tostring(separator)

	local results = {}
	local lastPos = 1 -- Note: in Lua, '1' is the start of everything, including strings

	for i = 1, input:len() do -- or: for i = 1, string.len(input) do
		if string.sub(input, i, i) == separator then -- or: if input:sub(i, i) == separator then
			table.insert(results, string.sub(input, lastPos, i - 1))
			lastPos = i + 1 -- Not set to 'i' because that would be the comma itself
		end
	end
	
	if string.len(input) ~= lastPos then
		table.insert(results, string.sub(input, lastPos)) -- This is to get the very last argument
	end

	return results
end

for i, v in pairs( explode("hello,world,how,are,you") ) do
	print(v)
end

Just importing old pastebin scripts to my gist