Akuma akuma

The introduction to Reactive Programming you've been missing

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

A few show tricks to find slow queries in mongodb

Enable profiling

First, you have to enable profiling

> db.setProfilingLevel(1)

Now let it run for a while. It collects the slow queries ( > 100ms) into a capped collections, so queries go in and if it's full, old queries go out, so don't be surprised that it's a moving target...

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

	function createObservable(subscribe) {
	return {
	subscribe,
	pipe: function(operator) {
	return operator(this);
	},
	};
	}

	const numberObservable = createObservable(function(observer) {

	skinparam Activity {
	ArrowColor
	ArrowFontColor
	ArrowFontName
	ArrowFontSize
	ArrowFontStyle
	BackgroundColor
	BarColor
	BorderColor
	BorderThickness

	@startuml
	' uncomment the line below if you're using computer with a retina display
	' skinparam dpi 300
	!define Table(name,desc) class name as "desc" << (T,#FFAAAA) >>
	' we use bold for primary key
	' green color for unique
	' and underscore for not_null
	!define primary_key(x) <b>x</b>
	!define unique(x) <color:green>x</color>
	!define not_null(x) <u>x</u>

	# Fix agent forwarding
	# https://gist.github.com/martijnvermaat/8070533
	# http://techblog.appnexus.com/2011/managing-ssh-sockets-in-gnu-screen/
	# See .ssh/rc for socket linking
	unsetenv SSH_AUTH_SOCK
	setenv SSH_AUTH_SOCK $HOME/.ssh/ssh_auth_sock.$HOSTNAME

	#!/bin/bash

	MONGO_DATABASE="your_db_name"
	APP_NAME="your_app_name"

	MONGO_HOST="127.0.0.1"
	MONGO_PORT="27017"
	TIMESTAMP=`date +%F-%H%M`
	MONGODUMP_PATH="/usr/bin/mongodump"
	BACKUPS_DIR="/home/username/backups/$APP_NAME"

	$('form').validate(
	{
	rules: {
	numero: {
	required: true
	},
	descricao: {
	minlength: 3,
	email: true,
	required: true