Sumit Wadhwa swport

Async Operations with `useReducer` Hook

9 March, 2019

We were discussing with @erusev what we can do with async operation when using useReducer() in our application. Our app is simple and we don't want to use a state management library. All our requirements are satisfied with using one root useReducer(). The problem we are facing and don't know how to solve is async operations.

In a discussion with Dan Abramov he recommends Solution 3 but points out that things are fresh with hooks and there could be better ways of handling the problem.

Problem

I have two Github accounts: oanhnn (personal) and superman (for work). I want to use both accounts on same computer (without typing password everytime, when doing git push or pull).

Solution

Use ssh keys and define host aliases in ssh config file (each alias for an account).

How to?

Generate ssh key pairs for accounts and add them to GitHub accounts.

	import axios from 'axios';

	const addToast = (message: string, type: 'success' \| 'error') => {
	/// add logic to show toast
	};

	// hook to know if there are network requests currently running
	// and how many are running
	export const useAxiosLoader = () => {
	const [counter, setCounter] = React.useState(0);

	import React, {
	createContext,
	useEffect,
	useReducer
	} from 'react';

	const lStorage = require('store'); // store.js library

	export const CartContext = createContext();

	<?php
	/*
	* USAGE:
	*
	* // this is where I define all my dependencies in case if they are not directly instantiable (resolvable)
	* $deps = array(
	* 'DependentClass' => array(
	* 'depclass' => 'DependencyClass'
	* )
	* );

	<?php
	// this will read in all the speakers, sort them by date, then store in a file for use later
	$speakerList = [
	'speaker-file',
	];

	$speakers_all = [];
	foreach($speakerList as $speaker) {
	$speakers_all[$speaker] = include_once("./speakers/{$speaker}.php");
	$speakers_all[$speaker]['bullet-points'] = text2bullets($speakers_all[$speaker]['bullet-points']);

	// First Register the Tab by hooking into the 'woocommerce_product_data_tabs' filter
	add_filter( 'woocommerce_product_data_tabs', 'add_my_custom_product_data_tab' );
	function add_my_custom_product_data_tab( $product_data_tabs ) {
	$product_data_tabs['my-custom-tab'] = array(
	'label' => __( 'My Custom Tab', 'woocommerce' ),
	'target' => 'my_custom_product_data',
	'class' => array( 'show_if_simple' ),
	);
	return $product_data_tabs;
	}

	# One liner
	wget --recursive --page-requisites --adjust-extension --span-hosts --convert-links --restrict-file-names=windows --domains yoursite.com --no-parent yoursite.com

	# Explained
	wget \
	--recursive \ # Download the whole site.
	--page-requisites \ # Get all assets/elements (CSS/JS/images).
	--adjust-extension \ # Save files with .html on the end.
	--span-hosts \ # Include necessary assets from offsite as well.
	--convert-links \ # Update links to still work in the static version.

	{
	"name": "webpack-sass",
	"version": "1.0.0",
	"scripts": {
	"start": "webpack-dev-server --open --mode development",
	"build": "webpack -p"
	},
	"devDependencies": {
	"babel-core": "^6.26.0",
	"babel-loader": "^7.1.4",

	<?php
	// public/cliserver.php (router script)

	if (php_sapi_name() !== 'cli-server') {
	die('this is only for the php development server');
	}

	if (is_file($_SERVER['DOCUMENT_ROOT'].'/'.$_SERVER['SCRIPT_NAME'])) {
	// probably a static file...
	return false;

Sumit Wadhwa swport

Async Operations with useReducer Hook

Problem

Problem

Solution

How to?

Async Operations with `useReducer` Hook