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Lists

#redis #data-types

1. Lists

  • Ordered collection of Strings
  • Duplicated are allowed
  • Elements can be adde and removed at Left or Right
  • Elements can be inserted relative to another
  • Used to implement Stacks and Queues
  • Are no nested
  • Implemented as a linked list

redis-list.excalidraw.png

2. LPUSH, LLEN, LRANGE

> LPUSH orders:4x100m-womens-final jane:4 bill:8 charlie:6 
(integer) 3

> LLEN orders:4x100m-womens-final
(integer) 3

> LRANGE orders:4x100m-womens-final 0 -1
1) "charlie:6"
2) "bill:8"
3) "jane:4"

redis-list-2.excalidraw.png

3. Push, Pop Works with Queue & Stack Internally

4. LINDEX, LINSERT, LSET, LREM

LINDEX key index
LINSERT key BEFORE|AFTER pivot value
LSET key index value
LREM key count value

5. Lists Use Cases

  • Activity Stream
  • IPC - Producuer-Consumer Queue
Last update: May 16, 2023
Created: May 16, 2023