rauschma

What is new in the ES2021 edition of “JavaScript for impatient programmers”?

Free to read online: exploringjs.com/impatient-js/

• The exercises now run as native ESM modules on Node.js. Previously, they were run via the esm package.
• Material on new ES2021 features:
  • String.prototype.replaceAll()
  • Promise.any()
  • Logical assignment operators
• Underscores (_) as separators in number literals and bigint literals

katepapineni

const ids = [];
const data = ['139', '576'];

data.map(id => ids.push(Math.max(...id)));

// What's the output?
console.log(ids);

emmabostian

HTML
- Semantic HTML
- Event delegation
- Accessibility / ARIA

CSS
- Specificity
- Pseudo-elements
- Pseudo-selectors
- Combinators

zcaceres

Articles for the New JS Dev

A list of the gists that have proved most useful to new JS devs on GitHub.

• Express: A Gentle Overview
• Setting Up Express
• Error Handling Patterns in Express
• Nested Routers in Express
• Basic Routing in Express
• Middleware With Express

cecilemuller

How to create an HTTPS certificate for localhost domains

This focuses on generating the certificates for loading local virtual hosts hosted on your computer, for development only.

Do not use self-signed certificates in production ! For online certificates, use Let's Encrypt instead (tutorial).

elitan

import React, { Component } from 'react';

import { withRouter } from 'react-router-dom'; // <--- import `withRouter`. We will use this in the bottom of our file.

class ContactForm extends Component {

  submitForm (e) {
    e.preventDefault()
    this.props.history.push('/thank-you'); // <--- The page you want to redirect your user to.
  }

juliovedovatto

// for browser using, this code requires javascript 1.7+

var arr = [
  { foo: 'bar', lorem: 'ipsum' },
  { foo: 'bar', lorem: 'ipsum' },
  { foo: 'bar', lorem: 'ipsum dolor sit amet' }
];

arr = arr.map(JSON.stringify).reverse() // convert to JSON string the array content, then reverse it (to check from end to begining)
  .filter(function(item, index, arr){ return arr.indexOf(item, index + 1) === -1; }) // check if there is any occurence of the item in whole array

zenorocha

1. Get your IP Address

echo `ifconfig $(netstat -nr | grep -e default -e "^0\.0\.0\.0" | head -1 | awk '{print $NF}') | grep -e "inet " | sed -e 's/.*inet //' -e 's/ .*//' -e 's/.*\://'`

2. Modify your hosts file

stevekinney

Module 1

• Semantic markup
• HTML standards mode and quirks mode
• HTML fundamentals
  • Classes and IDs
• CSS fundamentals
  • Selectors
  • Resets and normalizers
  • The box model

foosel

lsusb lists the fingerprint reader in the x240 as follows:

Bus 002 Device 003: ID 138a:0017 Validity Sensors, Inc.

There exists experimental driver support for this in a fork of libfprint for vfs5011 sensors, however you'll need to compile the driver yourself. To get the fingerprint sensor to work for lightdm login, su etc, follow these steps.

1. Install fingerprint-gui:

   sudo add-apt-repository ppa:fingerprint/fingerprint-gui