remoteSelf:1>hset website google "www.google.com"
"1"
remoteSelf:1>hget website
"ERR wrong number of arguments for 'hget' command"
remoteSelf:1>hget website google
"www.google.com"
remoteSelf:1>hset website baidu "www.baidu.com"
"1"
remoteSelf:1>hget website baidu
"www.baidu.com"
remoteSelf:1>hget website google
"www.google.com"
website相当于map的名字
google相当于map website中的key,"www.google.com"是key google的value
remoteSelf:1>hlen website
"2"
remoteSelf:1>hkeys website
1) "google"
2) "baidu"
remoteSelf:1>hvals website
1) "www.google.com"
2) "www.baidu.com"
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