Erick Wendel ErickWendel

SOLID is FP!

So, I decided to write a little thing, only to practice writing, it's about SOLID being compared between class-based-OO and FP, and there will be grammar errors and there will be a lot of formatting errors, 'bear' with me as I type this as fast as I can. Also correct if I'm wrong. Warning, wall of text in English.

Single responsibility principle

" a class should have only a single responsibility "

A pure function is something with a single responsibility, turning its input into an output. What could be simpler?.

Umbrella Challenge

Given a number of people N and an array of integers, each one representing the amount of people a type of umbrella can handle, output the minimum number of umbrellas needed to handle N people.

No umbrella could have left spaces. Which means if a umbrella can handle 2 people, there should be 2 people under it.

If there's no solution, return -1.

Examples

Edit — February 2019

This gist had a far larger impact than I imagined it would, and apparently people are still finding it, so a quick update:

TC39 is currently moving forward with a slightly different version of TLA, referred to as 'variant B', in which a module with TLA doesn't block sibling execution. This vastly reduces the danger of parallelizable work happening in serial and thereby delaying startup, which was the concern that motivated me to write this gist
In the wild, we're seeing (async main(){...}()) as a substitute for TLA. This completely eliminates the blocking problem (yay!) but it's less powerful, and harder to statically analyse (boo). In other words the lack of TLA is causing real problems
Therefore, a version of TLA that solves the original issue is a valuable addition to the language, and I'm in full support of the current proposal, which you can read here.

I'll leave the rest of this document unedited, for archaeological

Download Franz for your distribution from MeetFranz.com
change into the same directory as the downloaded file, then sudo tar -xf Franz-linux-x64-0.9.10.tgz -C /opt/franz
(optional) wget "https://cdn-images-1.medium.com/max/360/1*v86tTomtFZIdqzMNpvwIZw.png" -O franz-icon.png then sudo cp franz-icon.png /opt/franz
(optional) sudo touch /usr/share/applications/franz.desktop then sudo vim /usr/share/applications/franz.desktop

paste the following lines into the file, then save the file:

[Desktop Entry]
Name=Franz
Comment=

	// anywhere
	import proxyquire from '....../proxyquire.js'

	// proxyquire.js
	// use rewiremock to mock proxyquire
	import rewiremock, { addPlugin, plugins, overrideEntryPoint } from 'rewiremock';
	import stackTrace from 'stack-trace';

	rewiremock.requireActual('babel-register');

	## Generate a key
	# openssl rand -base64 741 > mongodb-keyfile
	## Create k8s secrets
	# kubectl create secret generic mongo-key --from-file=mongodb-keyfile
	---
	apiVersion: v1
	kind: Service
	metadata:
	name: mongo
	labels:

	Notes to make IR shield (made by LinkSprite) work in Raspberry Pi 3 (bought from Amazon [1]).
	The vendor has some documentation [2] but that is not complete and sufficient for Raspbian Stretch.
	Following are the changes that I made to make it work.

	$ sudo apt-get update
	$ sudo apt-get install lirc

	# Add the following lines to /etc/modules file
	lirc_dev
	lirc_rpi gpio_in_pin=18 gpio_out_pin=17

	start(() => {
	while(true)
	{
	print("a");
	sleep(1000);
	}
	})

	while(true)
	{

	set daemon 30
	set logfile syslog
	set idfile /var/.monit.id

	####### MAIL CONF ######

	set mailserver email-smtp.us-east-1.amazonaws.com port 465
	username "***************"
	password "***************"
	using SSLV3 with timeout 30 seconds

	#!/bin/bash

	#################################################
	# Right now we are assuming you have already #
	# installed docker within your machine and your #
	# current user belongs to docker system group #
	#################################################

	#################
	# ELASTICSEARCH #