cs

A Redis list is an ordered collection of elements stored under a single key.

Elements maintain their insertion order and can be added or removed from either side of the list.

Lists are commonly used to implement:

• queues
• stacks
• background job systems
• messaging pipelines

Example list:

tasks → ["task1", "task2", "task3"]

Adding Elements

LPUSH

Adds an element to the left side of the list.

LPUSH tasks "task1"

RPUSH

Adds an element to the right side.

RPUSH tasks "task2"

After these operations:

tasks → ["task1", "task2"]

Removing Elements

LPOP

Removes the first element.

LPOP tasks

RPOP

Removes the last element.

RPOP tasks

Reading Elements

LRANGE

Retrieves elements within a range.

LRANGE tasks 0 -1

0 represents the first element.
-1 represents the last element.

List Length

LLEN tasks

Returns the number of elements in the list.

Queue Example

A simple job queue can be implemented using:

RPUSH jobs "send_email"  
RPUSH jobs "generate_report"

Workers then process jobs using:

LPOP jobs

This creates a FIFO queue (First In First Out).

Related: [[Redis]] [[Redis - Strings]] [[Redis - Sets]] [[Redis - Hashes]] [[Redis - Sorted sets]]