## React News Friday, June 22

### FREE! Advanced React.js Lectures – Ryan Florence – Medium

• Advanced React.jsLectures – Weve been teaching our Advanced React.js patterns workshop for well over two years now.
• Weve done our best to give vocabulary to these patterns and help people understand when to use them.
• Earlier this year we released our Advanced React.js online course that took all the patterns from the workshop and put them online.
• Today, were making all of the Advanced React.js lectures free!
• We encourage you to purchase the course to get access to the exercises and solution videos, thats where youll really level up.

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### A simple data analysis in python

• After printing the mean values for the rows and columns, the next part of this program will plot those values in a two dimensional axis.
• After plotting the graph, the last part of this program will sort the calculated mean values in ascending order and print those values as the output.
• Code from line 24 to 38 will first create a list for the mean values and then start comparing the values to sort all the numbers in ascending order and then print the sorted mean row values as the output.
• Code from line 40 to 54 will do the same sorting but for the mean column values, and print the sorted values as the output, as well.
• Code for this program – – import numpy as np – import matplotlib.pyplot as plt – x = np.array([[15, 18, 15], [21, 12, 6],[35, 14, 18]]) – print(Original of each column:) – print of each for the mean values of row and row values in ascending order:) – def selectionSort(nlist):…

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### Create a website blocker with Python

• Our application will use file manipulation methods of Python to open this file and put these lines of code in this file.
• with open(hosts_file,’r+’) as file: – content=file.read() – – Now we will iterate over the websites list and check whether the websites are present in our host file.
• So now we have to produce a Python code that removes the list of blocked social media websites from the hosts file so that we can enjoy using our favorite social media websites.
• file.seek(0) – for line in content: – if not any(website in line for website in website_list): – file.write(line) – – And then we truncate the file to avoid for loop entering multiple blocks of text in the file.
• Source code: – – import time – from datetime import datetime as True: – if dt.now() with open(hosts_file,’r+’) as file: – content=file.read() – for website in website_list: – if website in content: – pass – else: – file.write(local+ + website+n) – else: – with open(hosts_file,’r+’) as file: – content=file.readlines() -…

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### Fetching Data Using Web API In React

• In this article, I’m going to display (Fetching) data using ASP.net web API in React JS.
• And in the below project templates list select Add folders and core references for: e.g. Web Form, MVC & Web API etc.
• For this error we need to add some code in web.config of web API project – – Now we can enable access web API from front end inside React .
• Simply create a BabelBundle containing any number of JSX or regular JavaScript files: (source: react) – – Add main bundle as per mentioned above in to _Layout.cshtml page – – Now Run the Web API project and after that run the ASP.NET MVC + React Application.
• And finally run both applications and display expected result from http get request with ASP.NET MVC + React JS + AXIOS.

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### Complex App Logic With Redux And Redux Saga: Write an Authentication Monitor

• function* generator() { – yield 1 – yield 2 – yield 3 – }const gen = generator()gen.next() – // { value: 1 }gen.next() – // { value: 2 }gen.next() – // { value: 3, done: true }The generator code should be straightforward except the yield keyword.
• function* fibGenerator(limit) { – let current = 0 – let next = 1 – let temp for (let i = 0; i limit; i++) { – temp = current – current = next – next = temp + next – yield current – } – }const fib = fibGenerator(3)fib.next() -…
• const ignoreActionTypes = [‘TOKEN_REFRESH’]function monitorableAction(action) { – return action.type – .
• function* monitor(monitoredAction) { – console.log(‘started monitoring’, monitoredAction.type) – const { fail } = yield race({ – success: fail: }) …There is no need to do anything if the process succeeds so there is only a check for a failure which is a result of an invalid token.
• …if (fail fail.payload fail.payload.code === 401) { – console.log(‘detected 401, refreshing token’) – yield put(userTokenRefreshRequest()) const { success } = yield race({ – success: fail: }) if (success) { – console.log(‘token refreshed, retrying’, monitoredAction.type) – yield put(monitoredAction) – } else { – console.log(‘token refresh failed, logging out user’) – yield…

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### Sunsetting React Native – Airbnb Engineering & Data Science – Medium

• This is the fourth in a series of blog posts in which we outline our experience with React Native and what is next for mobile at Airbnb.
• Although many teams relied on React Native and had planned on using it for the foreseeable future, we were ultimately unable to meet our original goals.
• Failing to Reach OurGoals – Move Faster – When React Native worked as intended, engineers were able to move at an unparalleled speed.
• It is not allbad – Although we werent able to achieve our goals with React Native, engineers who used React Native generally had a positive experience.
• Every company that uses React Native will have an experience that is a unique function of their team composition, existing app, product requirements, and maturity of React Native.

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### Top React Courses

#### Modern React with Redux (86,762 students enrolled)

By Stephen Grider

• Build amazing single page applications with React JS and Redux
• Master fundamental concepts behind structuring Redux applications
• Realize the power of building composable components
• Be the engineer who explains how Redux works to everyone else, because you know the fundamentals so well
• Become fluent in the toolchain supporting React, including NPM, Webpack, Babel, and ES6/ES2015 Javascript syntax

#### The Complete React Native and Redux Course (53,888 students enrolled)

By Stephen Grider

• Create real-world native apps using React Native
• Make truly reusable components that look great
• Understand the terminology and concepts of Redux
• Prototype and deploy your own applications to the Apple and Google Play Stores
• Get up to speed with React design principles and methodologies
• Discover mobile design patterns used by experienced engineers

#### Advanced React and Redux (35,016 students enrolled)

By Stephen Grider

• Build a scaleable API with authentication using Express, Mongo, and Passport
• Learn the differences between cookie-based and token-based authentication
• Figure out what a Higher Order Component and how to use it to write dramatically less code
• Write Redux middleware from scratch to uncover what is happening behind the scenes with Redux
• Set up your own testing environment with Mocha and Chai
• Realize the power of building composable components

#### React Redux React-Router: From Beginner to Paid Professional (11,715 students enrolled)

By Leonardo Daniel

• Building your amazing web applications with React JS and Redux
• Getting a high-paying job as a front-end developer
• Getting experience through doing many exercises. Re-enforcing your knowledge of ES6, advanced JavaScript, Redux, React through attempting a lot of quizzes. Practice makes perfect.
• Becoming familiar with the technologies supporting React, including NPM, Webpack, Babel, and ES6/ES2015.

#### React Native: Advanced Concepts (16,058 students enrolled)

By Stephen Grider

• Make compelling applications using expert-level features of React Native
• Create amazingly smooth and performant animations
• Build new React Native apps with Expo
• Understand the latest Navigation options for new React Native apps
• Handle your users going offline with Redux Persist

#### React JS and Redux – Mastering Web Apps (54,299 students enrolled)

By David Katz

• Develop entire React JS and Redux applications from scratch.
• Build applications that deal with APIs and web requests.
• Discuss ES6 and advanced JavaScript.
• Create web apps with full authentication, and real-time database.

#### React basic in just 1 hour (22,331 students enrolled)

By Leo Trieu

• Taste of how to build your very first React component.
• How to handle event in components.
• Understand two key concepts of React: State and Props.
• How to reuse and nest components.
• How to transfer data between Parent, Child components.
• How to work with Array, Form

#### Meteor and React for Realtime Apps (7,889 students enrolled)

By Stephen Grider

• Create interactive web apps amazingly fast
• Build amazing single page applications with Meteor and React JS
• Master fundamental concepts behind structuring Meteor applications
• Learn the true purpose of Meteor in a modern application
• Be the engineer who explains how Meteor works to everyone else, because you know the fundamentals so well
• Build and prototype interesting personal projects in a weekend

#### GraphQL with React: The Complete Developers Guide (14,683 students enrolled)

By Stephen Grider

• Build amazing single page applications with React JS and GraphQL
• Master fundamental concepts behind structuring GraphQL servers
• Realize the power of building flexible data schemas
• Be the engineer who explains how GraphQL works to everyone else, because you know the fundamentals so well
• Become fluent in the ecosystem supporting GraphQL, including the differences between Apollo and Relay

#### Essentials in JavaScript ES6 – A Fun and Clear Introduction (40,155 students enrolled)

By David Katz

• Create ES6 applications from the ground up.
• Use the terminal/command-line application and a code editor to code.
• Look at ES6 code and understand keyword and concepts.
• Create live development servers with Webpack.

#### The Full JavaScript & ES6 Tutorial – (including ES7 & React) (55,808 students enrolled)

By David Katz

• Code in JavaScript like a pro.
• Code in es6 comfortably, using all the new features.
• Build es6 projects from the ground up using tools like webpack and babel.
• Create a basic ReactJS application from scratch.