ARLASTITEMS - Upstash Documentation

Use ARLASTITEMS to read the values written most recently, without knowing where the cursor currently sits. The command walks backward from the append cursor, wrapping to the end of the array when it passes index 0, and collects up to <count> values. That wrapping is what makes it the natural reader for a ring built with ARRING: it returns the current window in write order regardless of where the ring has wrapped to. On a plain array appended to with ARINSERT, it returns the tail. By default the values come back oldest-first, which is the order they were written in. REV reverses that, returning the newest value first. Slots that are empty come back as null, and <count> is capped at the number of values the array holds. See the array command overview for the data model these commands share.

Syntax

ARLASTITEMS <key> <count> [REV]

Arguments

Argument	Required	Repeatable	Description
`<key>`	Yes	No	Array key targeted by the command.
`<count>`	Yes	No	Maximum number of values to return. Capped at the number of values stored.
`REV`	No	No	Return the newest value first instead of last.

Response

The reply reports the result of the operation. Error replies have the same shape in RESP2 and RESP3 and are surfaced as exceptions by the SDKs below.

Protocol	Reply
RESP2	Array of bulk strings and null bulk strings
RESP3	Array of bulk strings and nulls

Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.

Examples

TCP examples use the TLS REDIS_URL from the Upstash console. REST examples use UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN.

Redis CLI

ARLASTITEMS my-array 10

@upstash/redis

This command is not supported yet in @upstash/redis.

upstash_redis

This command is not supported yet in upstash_redis.

ioredis

import Redis from "ioredis";

const redis = new Redis(process.env.REDIS_URL!);
const result = await redis.arlastitems("my-array", 10);
console.log(result);

node-redis

import { createClient } from "redis";

const client = await createClient({ url: process.env.REDIS_URL })
  .on("error", console.error)
  .connect();
const result = await client.arLastItems("my-array", 10);
console.log(result);

redis-py

import os
import redis

client = redis.from_url(os.environ["REDIS_URL"])
result = client.arlastitems("my-array", 10)
print(result)

go-redis

package main

import (
    "context"
    "fmt"
    "os"

    "github.com/redis/go-redis/v9"
)

func main() {
    opts, err := redis.ParseURL(os.Getenv("REDIS_URL"))
    if err != nil {
        panic(err)
    }
    client := redis.NewClient(opts)
    result, err := client.ARLastItems(context.Background(), "my-array", 10, false).Result()
    if err != nil {
        panic(err)
    }
    fmt.Println(result)
}

jedis

import java.net.URI;

import redis.clients.jedis.Jedis;

try (Jedis jedis = new Jedis(new URI(System.getenv("REDIS_URL")))) {
  Object result = jedis.arlastitems("my-array", 10);
  System.out.println(result);
}

redis-rs

fn main() -> redis::RedisResult<()> {
    let url = std::env::var("REDIS_URL").expect("REDIS_URL is not set");
    let client = redis::Client::open(url)?;
    let mut connection = client.get_connection()?;

    let mut command = redis::cmd("ARLASTITEMS");
    command.arg("my-array");
    command.arg("10");
    let result: redis::Value = command.query(&mut connection)?;
    println!("{result:?}");
    Ok(())
}

​Syntax

​Arguments

​Response

​Examples

Syntax

Arguments

Response

Examples