Raymond Phu Nguyen rpn3319

Knowledge

More deeper understand about libuv, why it's run in 4 threads and how to config to improve NodeJS concurrency performance: https://www.sebastienvercammen.be/your-libuv-thread-pool-size-is-too-small/

nanoid, uuid: Unique string generator:
node-schedule: run jobs
concurrently: Run multi commands concurrently
live-server: run server with live reload capability, useful fast testing html files

Unit rem tip: Adding font size 62.5% to html to specify 1rem = 10px

Snippet

Set up
- install npm install -g ethereumjs-testrpc http-server
- install npm install solc [email protected]
Writing Smartcontract & deploying code
Building UI with html and js
Setting npm start script "start": "node deployContract.js && http-server .",
Run testrpc, then run npm start

	version: '3'

	networks:
	workspaces:
	driver: bridge

	services:
	zookeeper:
	image: confluentinc/cp-zookeeper:5.3.1
	restart: always

	package helper

	import (
	"math/rand"
	"time"
	)

	func Shuffle(arr []int) []int {
	for i := len(arr) - 1; i > 0; i-- {
	rand.Seed(time.Now().UTC().UnixNano())

	package helper

	func IndexOf(input []int, search int) int {
	if len(input) == 0 {
	return -1
	}

	for i, v := range input {
	if v == search {
	return i

	/**
	* Motivation
	*
	* We have a very big array need to be processed in order
	* with a async function and make sure that not blocking
	* other process
	*
	* Solution
	*
	* Using Timers functions of Node.js

	import * as winston from 'winston';

	const { combine, timestamp, prettyPrint, colorize, json } = winston.format;

	export const logger = winston.createLogger({
	format: combine(colorize(), json(), timestamp(), prettyPrint()),
	transports: [
	new winston.transports.Console({
	format: winston.format.simple(),
	level: 'info',

	console.time(__filename);
	const { default: axios } = require('axios');
	const fs = require('fs');
	const { createInterface } = require('readline');

	const file = process.argv[2];
	const token = process.argv[3] \|\| 'all';
	const dateStart = process.argv[4]
	? new Date(`${process.argv[4]} 0:0:0`).getTime() / 1000
	: null;