A complete guide to null safety in Kotlin

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Use JSON, querying, time series, and other capabilities provided by Redis Stack.Antonello Zanini Follow I'm a software engineer, but I prefer to call myself a technology bishop.

Write your own Redis module using the modules API or check out the community-supported modules.

Write your own custom server-side functions in Lua.

To extend the features provided by the included data types, use one of these options: The Redis HyperLogLog data structures provide probabilistic estimates of the cardinality (i.e., number of elements) of large sets. Redis bitfields efficiently encode multiple counters in a string value.īitfields provide atomic get, set, and increment operations and support different overflow policies. Redis bitmaps let you perform bitwise operations on strings.

Redis geospatial indexes command reference.

Redis geospatial indexes are useful for finding locations within a given geographic radius or bounding box. Streams help record events in the order they occur and then syndicate them for processing. Redis sorted sets are collections of unique strings that maintain order by each string's associated score.Ī Redis stream is a data structure that acts like an append-only log. Redis hashes are record types modeled as collections of field-value pairs.Īs such, Redis hashes resemble Python dictionaries, Java HashMaps, and Ruby hashes.

With a Redis set, you can add, remove, and test for existence O(1) time (in other words, regardless of the number of set elements). Redis sets are unordered collections of unique strings that act like the sets from your favorite programming language (for example, Java HashSets, Python sets, and so on).

Redis lists are lists of strings sorted by insertion order. Redis strings are the most basic Redis data type, representing a sequence of bytes.

If you'd like to try a comprehensive tutorial, see the Redis data types tutorial. Overview of data types supported by RedisĪt its core, Redis provides a collection of native data types that help you solve a wide variety of problems, from caching to queuing to event processing.īelow is a short description of each data type, with links to broader overviews and command references.

Kotlin list of strings