Ordered set

Q: How deeply does Amazon Web Services in Action, Third Edition: An in-depth guide to AWS cover ordered set?

Explains automatic score-based ordering and fast retrieval, but not sorted-set internals.

As explained in Amazon Web Services in Action, Third Edition: An in-depth guide to AWS

A sorted set is a collection of unique members maintained in order according to an associated score or ordering value.

A sorted set stores unique members in score order. Redis orders entries automatically when they are inserted, making sorted sets useful for fast leaderboard reads. section 11.0

Game leaderboard

Store player scores in a Redis sorted set to serve leaderboard reads from memory instead of repeatedly querying and sorting the relational database. section 11.0

ZREVRANGE "player-scores" 0 9

This Redis command shows a range query against the player-scores leaderboard. section 11.0

How Amazon Web Services in Action, Third Edition: An in-depth guide to AWS covers it

Cover of Amazon Web Services in Action, Third Edition: An in-depth guide to AWS

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Also explained in

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Java Persistence with Spring Data and Hibernate epubSortedSet is the Java collection interface for a set whose elements are ordered according to a specified comparator or their natural ordering.
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Clojure: The Essential Referencesorted-set is a Clojure function that creates a set whose elements are maintained according to a comparator-defined ordering.

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Related concepts

hash-setalternative to · hash-set is a Clojure function that creates an unsorted set from zero or more values, retaining only one value for each equality class.
Redisused by · Redis is an open-source, in-memory data-structure store that provides network-accessible data operations and supports persistence.
model bindingproduced by · Model binding is the process of locating incoming data, converting it to appropriate types, and assigning it to application objects or handler parameters.
comparison functionuses · A comparison function or strategy compares two values and indicates their relative ordering, and sometimes whether they are equivalent.
sorted collectionkind of · A sorted collection is a collection whose elements are maintained or presented according to a defined ordering relation.

This explainer was generated by Manning's knowledge graph from the text of Amazon Web Services in Action, Third Edition: An in-depth guide to AWS. The section links point to the parts of the book it draws on.