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..."

rocktimsaikia

Installing nodejs in Windows Subsystem for Linux (WSL) ⚡

Assuming that you already have WSL installed in your windows.

Steps

1. update Ubutu to it's latest version. Don't if you already have.

sudo is equivalent to running as administrator

sudo apt-get update