Pana Pana

Here's how you could create custom error classes in Node.js using latest ES6 / ES2015 syntax.

I've tried to make it as lean and unobtrusive as possible.

Defining our own base class for errors

errors/AppError.js

Create your own Ethereum private network

Introduction

Used nodes:

Linux raspberrypi 4.9.41-v7+ #1023 SMP Tue Aug 8 16:00:15 BST 2017 armv7l GNU/Linux

Linux localhost.localdomain 4.14.5-200.fc26.x86_64 #1 SMP Mon Dec 11 16:29:08 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

JSConf Slides, Codes and Notes

These are all the JSConf 2014 slides, codes, and notes I was able to cull together from twitter. Thanks to the speakers who posted them and thanks to @chantastic for posting his wonderful notes.

Modular frontend with NPM - Jake Verbaten (@Raynos)

Ben Acker (@nvcexploder / Walmart) - Node in Production

Impetus: Walmart wanted a mobile presence. They built an application that looked like it was created by a giant retail operation--SOAP services, etc.
Started looking for other options: native apps,
Started with services team (worked on original app, spinning out to other mobile apps)--all of a sudden had loads of different clients consuming the services. Converting old soap/XML into something mobile-friendly?
High volume days (black Friday) start taking services down, and services team already distracted by mobile projects
Time to start building better services
Brought Eran Hammer over from Yahoo and gave him the go-ahead to use anything he wanted to improve mobile services. He chose node.
Walmart's been open-source from the start
But how to maintain legacy services?

	const request = require('request');
	const { Conflux } = require("js-conflux-sdk");
	const cfx = new Conflux({
	url: "http://mainnet-jsonrpc.conflux-chain.org:12537"
	});

	function hex_to_ascii(str1) {
	var hex = str1.toString();
	var str = '';
	for (var n = 0; n < hex.length; n += 2) {

	ssh-keygen -t rsa -b 4096 -m PEM -f jwtRS256.key
	# Don't add passphrase
	openssl rsa -in jwtRS256.key -pubout -outform PEM -out jwtRS256.key.pub
	cat jwtRS256.key
	cat jwtRS256.key.pub

	'use strict';

	module.exports = function CustomError(message, extra) {
	Error.captureStackTrace(this, this.constructor);
	this.name = this.constructor.name;
	this.message = message;
	this.extra = extra;
	};

	require('util').inherits(module.exports, Error);

	/* *******************************************************************************************
	* THE UPDATED VERSION IS AVAILABLE AT
	* https://github.com/LeCoupa/awesome-cheatsheets
	* ******************************************************************************************* */


	// 0. Synopsis.
	// http://nodejs.org/api/synopsis.html

	# NPM CheatSheet.
	# Super easy intall: npm comes with node now.
	# To create your own npm package: https://www.npmjs.org/doc/misc/npm-developers.html
	# More: https://www.npmjs.org/doc/


	# 1. NPM Command Lines.
	# Local mode is the default.
	# Use --global or -g on any command to operate in global mode instead.

	// This script will boot app.js with the number of workers
	// specified in WORKER_COUNT.
	//
	// The master will respond to SIGHUP, which will trigger
	// restarting all the workers and reloading the app.

	var cluster = require('cluster');
	var workerCount = process.env.WORKER_COUNT \|\| 2;

	// Defines what each worker needs to run