Salman Mahmud salmanx

MongoDB Cheat Sheet

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Optional - Set format on save and any global prettier options

npm i -D eslint prettier eslint-plugin-prettier eslint-config-prettier eslint-plugin-node eslint-config-node

Add gem 'rails_12factor' to your Gemfile. This will add error logging and the ability for your app to serve static assets.
bundle
Run RAILS_ENV=production rake db:create db:migrate db:seed
Run rake secret and copy the output
From the command line: export SECRET_KEY_BASE=output-of-rake-secret
To precompile your assets, run rake assets:precompile. This will create a folder public/assets that contains all of your assets.
Run RAILS_ENV=production rails s and you should see your app.

Remember to clobber your assets (rake assets:clobber) and re-precompile (rake assets:precompile) if you make changes.

	// basic uses

	// user component using useState
	const User = () => {
	const [userDetails, setUserdetails] = useState();
	const [loading, setLoading] = useState(false);
	const [error, setError] = useState();

	useEffect(() => {
	setLoading(true);

 // src/App.js
 import React from "react";
 const UserContext = React.createContext();
 export default function App() {
   const user = { name: "Reed" };
   return (

	### DigitalOcean Ubuntu 18.04 x64 + Rails 5 + Nginx + Unicorn + PostgreSQL9.6 + Capistrano 3

	SSH into Root

	$ ssh [email protected]

	Change Root Password

	$ passwd

	const arr = [1, 1, 12, 4, 4, true, false, true, null];

	const filteredArr = [...new Set(arrr)]

	// result: [1, 12, 4, true, false, null]

	import React, { Component } from 'react';
	import styled from 'styled-components';

	export default class Tab extends Component {
	constructor(props) {
	super(props);
	console.log(this.props);

	this.state = {
	activeTabIndex: 1