Ruby script for a Redis zpop

zpop.rb

require 'redis'

get_and_rem_script = <<EOF
  local resp = redis.call('zrangebyscore', KEYS[1], '-inf', '+inf', 'LIMIT', '0', '1');
  if (resp[1] ~= nil) then
    local val = resp[# resp]
    redis.call('zrem', KEYS[1], val)
    return val
  else
    return false
  end
EOF

r = Redis.new(:port => 6379)
r.del('test')
r.zadd('test', [0, 'foo'], [1, 'bar'])
puts r.eval(get_and_rem_script, [:test1])
puts r.zrange('test', '0', '10')