Command builders for Redis set operations.

This module provides pure functions that build Redis SET command lists. Sets are unordered collections of unique strings, useful for membership tracking, tagging, and computing intersections, unions, and differences across collections.

Every function returns a plain list of strings (a command). To execute a command, pass the result to Redis.command/2; to batch several commands in a single round trip, use Redis.pipeline/2.

Examples

Adding members and retrieving a set:

iex> Redis.command(conn, Redis.Commands.Set.sadd("tags", ["elixir", "redis", "otp"]))
{:ok, 3}

iex> Redis.command(conn, Redis.Commands.Set.smembers("tags"))
{:ok, ["elixir", "redis", "otp"]}

Set operations -- intersection and union:

iex> Redis.pipeline(conn, [
...>   Redis.Commands.Set.sadd("set:a", ["1", "2", "3"]),
...>   Redis.Commands.Set.sadd("set:b", ["2", "3", "4"]),
...>   Redis.Commands.Set.sinter(["set:a", "set:b"]),
...>   Redis.Commands.Set.sunion(["set:a", "set:b"])
...> ])
{:ok, [3, 3, ["2", "3"], ["1", "2", "3", "4"]]}

Removing members:

iex> Redis.command(conn, Redis.Commands.Set.srem("tags", ["otp"]))
{:ok, 1}