What are the related commands for redis ordered collections?

The related commands of redis ordered collection are: 1. "ZADD", call the ziplistInsert function, insert the members and scores into the compressed list as two nodes respectively; 2. "ZCARD", call the ziplistLen function, Get the number of nodes contained in the compressed list; 3. "ZCOUND" command, etc.

Implementation method of ordered set command

Command	ziplist encoding implementation method	zset encoding implementation method
ZADD	Call ziplistInsert function , insert members and scores into the compressed list as two nodes respectively	First call the zslInsert function to add the new element to the jump table, and then call the dictAdd function to associate the new element to the dictionary
ZCARD	Call the ziplistLen function to get the number of nodes contained in the compressed list, divide this number by 2 to get the number of set elements	Access the jump table data structure length attribute, directly accessing the number of collection elements
ZCOUND	Traverse the compressed list and count the number of nodes with scores within a given range	Traverse the jump table and count the number of nodes with scores within a given range
ZRANGE	Traverse the compressed list from the head to the end of the table and return the given index range All elements in	Traverse the jump table from the head to the end of the table, and return all elements within the given index range
ZREVRANGE	Tail of the table Traverse the compressed list toward the head and return all elements in the given index range	Traverse the jump table from the end of the table to the head and return all elements in the given index range
ZRANK	Traverse the compressed list from the head to the end of the table, find the given member, and record the number of nodes passing through it along the way. When a given member is found, the number of nodes along the way is the number of elements corresponding to the member. Ranking	Traverse the jump table from the head to the end of the table, find the given member, and record the number of nodes passing through it along the way. When a given member is found, the number of nodes along the way is the ranking of the element corresponding to the member
ZREVRANK	Traverse the compressed list from the end of the table to the head, find the given member, and record the number of nodes passing through along the way. When the given member is found, the nodes along the way The number is the ranking of the element corresponding to the member.	Traverse the jump table from the end of the table to the head, look for the given member, and record the number of nodes passing through along the way. When the given member is found, the number of nodes along the way It is the ranking of the element corresponding to the member
ZREM	Traverse the compressed list, delete all nodes containing the given member, and the score nodes next to the deleted member node	Traverse the jump table and delete all jump table nodes that contain the given member. And disassociate the member and score of the deleted element in the dictionary
ZSCORE	Traverse the compressed list, find the node that contains the given member, and then take out the member node The element score saved by the score node next to it	Get the score of the given member directly from the dictionary

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