-- gets all fields from a hash as a dictionary
local hgetall = function (key)
  local bulk = redis.call('HGETALL', key)
	local result = {}
	local nextkey
	for i, v in ipairs(bulk) do
		if i % 2 == 1 then
			nextkey = v
		else
			result[nextkey] = v
		end
	end
	return result
end

-- gets multiple fields from a hash as a dictionary
local hmget = function (key, ...)
	if next(arg) == nil then return {} end
	local bulk = redis.call('HMGET', key, unpack(arg))
	local result = {}
	for i, v in ipairs(bulk) do result[ arg[i] ] = v end
	return result
end


-- setup a redis hash
redis.call('HMSET', 'myhash',
	'field1', 'value1',
	'field2', 'value2',
	'field4', 'value4',
	'field5', 'value5',
	'field3', 'value3');

-- put the redis hash into a dictionary table
local mytable = hgetall('myhash')
local mytable2 = hmget('myhash', 'field4', 'field5')


-- print key -> value for mytable
print('mytable:')
for k, v in pairs(mytable) do
	print('    ' .. k .. ' -> ' .. v)
end

-- print key -> value for mytable
print('mytable2:')
for k, v in pairs(mytable2) do
	print('    ' .. k .. ' -> ' .. v)
end