rocktimsaikia

List of all of my fav youtube shorts/videos

https://www.youtube.com/shorts/uWEIaF0PNGg

Python optimization trick. Reassign global varibale in local scope specially in loops inside a function.

rocktimsaikia

Connect Apple AirPods to Linux (Ubuntu)

# 1. Open the below file with vim
sudo vim /etc/bluetooth/main.conf

# 2. Change the value of this field to bredr
ControllerMode = bredr

# 3. Save and Exit from Vim.

rocktimsaikia

Tabs

New Tab

• :tabnew - new blank tab
• :tabedit [file] - open file in tab

Cursor Movement

• gt (:tabn) - next tab

rocktimsaikia

Tmux cheatsheet

ctrl+b+" = Splits the window horizantally
ctrl+c+% = Splits the window vertically
ctrl+d = Drop the current pane
ctrl+b+<arrows> = to switch between pages
ctrl+b+z = Zoom in and out in the current pane
ctrl+b+c = Create a new window
ctrl+b+p = Go to the previous window
ctrl+b+n = Go to the next window \

rocktimsaikia

const uptime = new Date(Math.floor(process.uptime()) * 1000).toISOString().substr(11, 8)

rocktimsaikia

Keybase proof

I hereby claim:

• I am rocktimsaikia on github.
• I am rocktimcodes (https://keybase.io/rocktimcodes) on keybase.
• I have a public key ASAuQYTNFSXBEjGqCDGvRT2LVEDf48FlHEvoVSBnk1I_ggo

To claim this, I am signing this object:

rocktimsaikia

// Inverts the integers of an array
const invert = arr => arr.map(n => -n);

invert([2,-5]); //=> [-2,5]

rocktimsaikia

🔥 Here is how to paginate in MongoDB using mongoose :

// Here it is hardcoded for example but 
// generally the `pageNum` should come from request query param
const pageNum = 2;
const pageSize = 10;

// pagination formula
const paginate = (pageNum - 1) * pageSize; 

rocktimsaikia

Common mongo shell commands/methods

show dbs : Show all the databases.
use <database> : switch/move into a database.
show collections : Show all the collections in that database.
db.<collection>.find() : Show all documents in the collection.
db.<collection>.help() : Show help on collection methods.
db.<collection>.drop() : Drops or removes completely the collection.
db.<collection>.deleteMany() : Delete documents from the collection.
db.dropDatabase(): Deletes a database.

rocktimsaikia

Initialize Git: git init

et everything ready to commit: git add .

et custom file ready to commit: git add index.html

ommit changes: git commit -m "Message"

ommit changes with title and description: git commit -m "Title" -m "Description..."