Candido Sales Gomes candidosales

ZeroMQ vs Redis

This document is research for the selection of a communication platform for robot-net.

Goal

The purpose of this component is to enable rapid, reliable, and elegant communication between the various nodes of the network, including controllers, sensors, and actuators (robot drivers). It will act as the core of robot-net to create a standardized infrastructure for robot control.

Requirements:

Hello, visitors! If you want an updated version of this styleguide in repo form with tons of real-life examples… check out Trellisheets! https://github.com/trello/trellisheets

Trello CSS Guide

“I perfectly understand our CSS. I never have any issues with cascading rules. I never have to use !important or inline styles. Even though somebody else wrote this bit of CSS, I know exactly how it works and how to extend it. Fixes are easy! I have a hard time breaking our CSS. I know exactly where to put new CSS. We use all of our CSS and it’s pretty small overall. When I delete a template, I know the exact corresponding CSS file and I can delete it all at once. Nothing gets left behind.”

You often hear updog saying stuff like this. Who’s updog? Not much, who is up with you?

Some books I've been studying to improve my skills as a SRE/System Engineer.

	# first:
	lsbom -f -l -s -pf /var/db/receipts/org.nodejs.pkg.bom \| while read f; do sudo rm /usr/local/${f}; done
	sudo rm -rf /usr/local/lib/node /usr/local/lib/node_modules /var/db/receipts/org.nodejs.*

	# To recap, the best way (I've found) to completely uninstall node + npm is to do the following:

	# go to /usr/local/lib and delete any node and node_modules
	cd /usr/local/lib
	sudo rm -rf node*

	class UserProfile < ActiveRecord::Base
	has_attached_file :picture,
	styles: {
	original: {geometry: '1000x0>'},
	thumb: '100x100#',
	large: '300x200>',
	},
	convert_options: {large: "-quality 80 -strip -interlace Plane"},
	default_url: "http://s3-ap-southeast-1.amazonaws.com/#{ENV["S3_BUCKET"]}/user_profiles/placeholder.png",
	path: (Rails.env == 'test' \|\| Rails.env == 'development') ? ":rails_root/public/images/:class/:id/:style/:filename" : "/:class/:id/:style/:filename",

	package com.stephen.demo;

	import android.Manifest;
	import android.annotation.TargetApi;
	import android.app.KeyguardManager;
	import android.content.Context;
	import android.content.pm.PackageManager;
	import android.hardware.fingerprint.FingerprintManager;
	import android.os.Build;
	import android.os.CancellationSignal;

	import time
	from selenium import webdriver
	# from urlparse import urlparse
	# from urlparse import parse_qs
	from selenium.webdriver.support.ui import WebDriverWait
	# from selenium.common.exceptions import NoSuchElementException
	# from selenium.webdriver.common.action_chains import ActionChains
	from selenium.webdriver.support import expected_conditions as EC
	from selenium.webdriver.common.by import By
	# from selenium.webdriver.common.keys import Keys

	import android.app.NotificationManager;
	import android.app.PendingIntent;
	import android.content.Context;
	import android.content.Intent;
	import android.support.v4.app.NotificationCompat;

	import com.squareup.picasso.Picasso;

	import java.io.IOException;

	// Multiplication and division rules... ((+)(+)=+) ((-)(-)=+) ((+)(-)=-) ((-)(+)=-)
	const multiply = (x, y) => {
	let r = Math.exp(Math.log(Math.abs(x)) + Math.log(Math.abs(y))).toFixed(2)
	return Number((x < 0 && y < 0) ? r : (x < 0 \|\| y < 0) ? -r : r)
	}

	const divide = (x, y) => {
	return (x === 0) ? 0 : multiply(((multiply(x, y) < 0) ? -1.0 : 1.0), Math.exp(Math.log(Math.abs(x)) - Math.log(Math.abs(y))))
	}

	import Sequelize from 'sequelize'
	import bcrypt from 'bcrypt-nodejs'
	import connection from '../config/db'

	require('sequelize-isunique-validator')(Sequelize)

	let User = connection.define('user', {
	firstName: {
	type: Sequelize.STRING(50),
	allowNull: false,