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Keychron K2 Manual

Connect Bluetooth

On the side of the keyboard, switch the toggle to Bluetooth. Press fn+1 ^{3 seconds} and pair with device named Keychron K2.

• fn+1 connect to 1st device

• fn+2 connect to 2nd device

• fn+3 connect to 3rd device

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// For https://cleartax.in/save/rent

// date of repayment against the receipt number
var dateOfPayments = {
    1: "Apr 02 2022",
    2: "May 01 2022",
    3: "Jun 02 2022",
    4: "Jul 04 2022",
    5: "Aug 03 2022",
    6: "Sep 04 2022",

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• JavaScript runs on browser in Browser's JavaScript engine(V8 in Chrome, Spidermonkey in firefox, etc)
• Somebody ported V8 engine and made it installable in server. This is what is Node.js.
• You can run JavaScript in node.js(instead of the browser)
• Even servers can be written in node.js(with libraries like express.js)
• With Node.js unlimited possibilities arose
• Thats how Node.js Packages were born(now known as npm packages)
• These are just some javascript files published into some registry(like a telephone registry but for js packages)
• npmjs.com is a good package registry widely used
• In node.js, then came the need to manage these packages(as people wanted to use packages written by other folks)
• so package managers like npm(by npmjs.com) and yarn(by facebook) was born (// These tools are similar to Maven in Java)

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Local Postgres

This gist is an example of how you can simply install and run and extended Postgres using docker-compose. It assumes that you have docker and docker-compose installed and running on your workstation.

Install

• Requires docker and docker-compose
• Clone via http: git clone https://gist.github.com/b0b7e06943bd389560184d948bdc2d5b.git
• Make load-extensions.sh executable
• Build the image: docker-compose build

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WTF

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sudo rm -rf /var/lib/apt/lists/*

sudo apt-get update -o Acquire::CompressionTypes::Order::=gz

sudo apt-get update && sudo apt-get upgrade

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Pipenv Cheat Sheet

Install pipenv

pip3 install pipenv

Activate

pipenv shell

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MySQL Cheat Sheet

Help with SQL commands to interact with a MySQL database

MySQL Locations

• Mac /usr/local/mysql/bin
• Windows /Program Files/MySQL/MySQL version/bin
• Xampp /xampp/mysql/bin

Add mysql to your PATH

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const request = require('request');
const cheerio = require('cheerio');
const fs = require('fs');
const writeStream = fs.createWriteStream('post.csv');

// Write Headers
writeStream.write(`Title,Link,Date \n`);

request('http://codedemos.com/sampleblog', (error, response, html) => {
  if (!error && response.statusCode == 200) {

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Docker Commands, Help & Tips

Show commands & management commands

$ docker

Docker version info