chief 117

Run node app in background

Running a script in the background in linux can be done using nohup, using nohup we can run node application in the background

$ nohup node server.js > /dev/null 2>&1 &

nohup means: Do not terminate this process even when the stty is cut off
> /dev/null means: stdout goes to /dev/null (which is a dummy device that does not record any output)

Moved to git repository: https://github.com/denji/golang-tls

Generate private key (.key)

# Key considerations for algorithm "RSA" ≥ 2048-bit
openssl genrsa -out server.key 2048

# Key considerations for algorithm "ECDSA" ≥ secp384r1
# List ECDSA the supported curves (openssl ecparam -list_curves)

	import crypto from 'crypto'

	// WARNING: DO NOT CHANGE THESE WITH OPEN POSITIONS
	const PREFIX = 'X'
	const CHARSET = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZ'
	const RANDOM_LENGTH = 16
	const EXPRESSION = new RegExp(`^${PREFIX}-[0-9A-Z]{${RANDOM_LENGTH}}-\\d+$`)

	// UNIQ-SEQ
	export class PositionId {


	// HTTPS API
	import https from "https";

	/**
	* Executes an HTTP request
	* @param {string \| URL} url The url
	* @returns {Promise<any>} The response
	*/
	export default (url, { method, headers, data } = {}) => new Promise((res, rej) => {

	# let's keep things quiet
	touch .hushlogin

	# make sure everything is up to date
	sudo apt update
	sudo apt upgrade

	# cleanup
	sudo apt remove telnet
	sudo apt autoremove

	# https://play.golang.org/p/JxqibtHkuO-

	func chunkBy(items []string, chunkSize int) (chunks [][]string) {
	for chunkSize < len(items) {
	items, chunks = items[chunkSize:], append(chunks, items[0:chunkSize:chunkSize])
	}

	return append(chunks, items)
	}

	function weightedMean(arrValues, arrWeights) {

	var result = arrValues.map(function (value, i) {

	var weight = arrWeights[i];
	var sum = value * weight;

	return [sum, weight];
	}).reduce(function (p, c) {

	# The command finds the most recent tag that is reachable from a commit.
	# If the tag points to the commit, then only the tag is shown.
	# Otherwise, it suffixes the tag name with the number of additional commits on top of the tagged object
	# and the abbreviated object name of the most recent commit.
	git describe

	# With --abbrev set to 0, the command can be used to find the closest tagname without any suffix:
	git describe --abbrev=0

	# other examples