decrement

# File activesupport/lib/active_support/cache/mem_cache_store.rb, line 114
      def decrement(key, amount = 1) # :nodoc:
        log("decrement", key, amount)
        response = @data.decr(key, amount)
        response == Response::NOT_FOUND ? nil : response
      rescue MemCache::MemCacheError
        nil
      end