Use Redis from Node.js Module #63

Question 1

How is Redis Installed?

Answer 1

npm intit -y (add “type”: “module” to your package.json file) Then: npm install redis

Question 2

How is the redis object created?

Answer 2

const redis = require(“redis”)

OR

import redis from ‘redis’

Question 3

Next the client needs to get set up, how to do this?

Answer 3

const client = redis.createClient( )

Question 4

How are values stored ?

Answer 4

client.set( “keyname”, “value” )

Question 5

How are keys returned using JavaScript in Redis?

Answer 5

.get( ) method

client.get( “name”, ( err, res ) => {
console.log( res )//’Flavio”
} )

Async functions are not allowed so we use callbacks. Res = Result which is being logged

Question 6

How can we delete a key?

Answer 6

client.del( “names” )

Question 7

If we need to create a regular list how is that done?

Answer 7

client.lpush.( ‘names’, ‘Flavio’)

creates a list and adds Flavio to the top of that list

Question 8

What if we wanted to create a list and push the new entry to the bottom?

Answer 8

client.rpush( ‘rname’, ‘roger’ )