Use global or constant variable in Ruby/Rails? -

say have connection memcache or redis... style preferred , why?

memcache = memcache.new(...) redis = redis.new(...)

$memcache = memcache.new(...) $redis = redis.new(...)

you might want use redis.current more info here

for example, in initializer:

redis.current = redis.new(host: 'localhost', port: 6379)

and in other classes:

def stars   redis.smembers("stars") end  private  def redis   redis.current end

Funaction