staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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sebmarkbage

import { Component } from "React";

export var Enhance = ComposedComponent => class extends Component {
  constructor() {
    this.state = { data: null };
  }
  componentDidMount() {
    this.setState({ data: 'Hello' });
  }
  render() {

samwgoldman

/* @flow */

var React = require("react")
var Immutable = require("immutable")

// In order to use any type as props, including Immutable objects, we
// wrap our prop type as the sole "data" key passed as props.
type Component<P> = ReactClass<{},{ data: P },{}>
type Element = ReactElement<any, any, any>

insin

var Col = require('react-bootstrap/lib/Col')
var PageHeader = require('react-bootstrap/lib/PageHeader')
var React = require('react')
var Row = require('react-bootstrap/lib/Row')
var {connect} = require('react-redux')
var {reduxForm} = require('redux-form')

var DateInput = require('./DateInput')
var FormField = require('./FormField')
var LoadingButton = require('./LoadingButton')

diegoconcha

###Redux Egghead Video Notes###

####Introduction:#### Managing state in an application is critical, and is often done haphazardly. Redux provides a state container for JavaScript applications that will help your applications behave consistently.

Redux is an evolution of the ideas presented by Facebook's Flux, avoiding the complexity found in Flux by looking to how applications are built with the Elm language.

####1st principle of Redux:#### Everything that changes in your application including the data and ui options is contained in a single object called the state tree

joepie91

By the way, I'm available for tutoring and code review :)

Table of contents

1. What Promises library should I use?
2. How do I create a Promise myself?
3. How do I use new Promise?
4. How do I resolve a Promise?
5. But what if I want to resolve a synchronous result or error?
6. [But what if it's at the start of a chain, and I'm not in a .then callback yet?](https://gist.github.com/joepie91/4c3a10629a4263a522e3bc4839a28c83#6-but

aortbals

With the introduction of GitHub's Squash and Merge feature, this has become less prevelant, however it's still useful in scenarios where GitHub's interface is unavailable.

Let's talk through two ways to do a squash and merge on the command line.

Take 1: Interactive Rebase

When to use it

• When you have not merged main into your feature branch
• There are no merge conflicts

the0neWhoKnocks

Jest Testing Examples

• Common Use Cases
  • Testing a function was called with a specific Object property
  • Testing a function was called with a bound callback
  • Setting props on window.location
  • Working with History
  • Time travel
  • Testing exceptions
• Check if an Object contains multiple keys