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PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

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echo '.env' >> .gitignore
git rm -r --cached .env
git add .gitignore
git commit -m 'untracking .env'
git push origin master

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[user]
	email = [email protected]
	name = Igor ESCHALIER

[alias]
	co = checkout
  br = branch
  sts = status --short
	last-log = log -5 --pretty --oneline
	who = shortlog -sn

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ESLint, Prettier & Airbnb Setup

1. Install ESLint & Prettier extensions for VSCode

Optional - Set format on save and any global prettier options

2. Install Packages

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

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Do not use forEach with async-await

TLDR: Use for...of instead of forEach in asynchronous code.

The problem

Array.prototype.forEach is not designed for asynchronous code. (It was not suitable for promises, and it is not suitable for async-await.)

For example, the following forEach loop might not do what it appears to do:

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tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

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import { useLayoutEffect, useCallback, useState } from 'react'

export const useRect = (ref) => {
  const [rect, setRect] = useState(getRect(ref ? ref.current : null))

  const handleResize = useCallback(() => {
    if (!ref.current) {
      return
    }

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Homebrew: Install an older version of a formula

kubernetes-cli (v1.10.3) taken as example

1. Downgrade Homebrew to the commit which upgrades the formula to the specific version that we want

$ cd "$(brew --repo homebrew/core)"
$ git log Formula/kubernetes-cli.rb

...