试图让 aerospike ruby 客户端在 1.8 下工作
ruby 1.8 中这些调用的等价物是什么?
https://github.com/aerospike/aerospike-client-ruby/blob/master/lib/aerospike/utils/buffer.rb#L65
https://github.com/aerospike/aerospike-client-ruby/blob/master/lib/aerospike/utils/buffer.rb#L95