Using Redis Sets
Sets have 2 main differences with lists:
- sets are not ordered
- sets only hold an item once
Create a set using
SADD <setkey> <value>
The same command is used to add more items to the set.
SADD names "Flavio" SADD names "Roger" SADD names "Tony" "Mark" "Jane"
Get all the items in a set using
Find out if a value is in a set with
SISMEMBER names "Flavio"
To know how many items are in a set, use
Get (without removing) an item from the set, randomly:
Extract (and remove) an item from the set, casually ordered:
You can extract multiple items at once:
SPOP names 2
Remove an item from a set by value:
SREM names "Flavio"
Get the items contained in 2 different sets, exclusing elements only included in one with
SINTER set1 set2
See all the sets commands here.
THE VALLEY OF CODE
THE WEB DEVELOPER's MANUAL
You might be interested in those things I do:
- Learn to code in THE VALLEY OF CODE, your your web development manual
- Find a ton of Web Development projects to learn modern tech stacks in practice in THE VALLEY OF CODE PRO
- I wrote 16 books for beginner software developers, DOWNLOAD THEM NOW
- Every year I organize a hands-on cohort course coding BOOTCAMP to teach you how to build a complex, modern Web Application in practice (next edition February-March-April-May 2024)
- Learn how to start a solopreneur business on the Internet with SOLO LAB (next edition in 2024)
- Find me on X