ZADD
Initial
Play 1
Play 2
Play 3
Play 4
ZADD key score member [score member ...]
ZADD myzip 4 "New York"
ZADD myzip 2 "Seoul"
ZADD myzip 3 "Beijing"
ZADD myzip 1 "New Delhi"
myzip
1
New Delhi
2
Seoul
3
Beijing
4
New York
INDEX
REVERSE
INDEX