Evaldo Bento InFog

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

Serving Flask under a subpath

Your Flask app object implements the __call__ method, which means it can be called like a regular function. When your WSGI container receives a HTTP request it calls your app with the environ dict and the start_response callable. WSGI is specified in PEP 0333. The two relevant environ variables are:

SCRIPT_NAME
The initial portion of the request URL's "path" that corresponds to the application object, so that the application knows its virtual "location". This may be an empty string, if the application corresponds to the "root" of the server.

I was hesitant as to whether or not to publish this, but in an act to create awareness in a community where some people, including me, are left uncomfortable and no one notices, I decided to go ahead. Feel free to share your experiences too, to further spread awareness in our community, because awareness is the first step.

I noticed that I started being more and more reserved the more events I went to rather than the other way around. This worried me and I was up until late hours thinking, why is that?

What happens at the events may be part of that, so here I'm sharing to create awareness. Bear in mind that this is only a handful of things that happened to me at conference socials, to give you an idea as to why I'm nowadays inclined to only hangout with the people I know, or skip the conference socials all together.

When you notice that behaviour from me remember that: It's not you, it's me, feel free to say hi but please understand why I may be a bit shy at first.

Disclaimer: I didn’t repor

PHP Conferences Fall 2015

Conference	WebSite	City	Country	Date
PHP SouthCoast	http://2015.phpsouthcoast.co.uk	Portsmouth	UK	18/07
Laracon US	http://laracon.us	Luisville, KY	US	11-12/08
NorthEastPHP	http://2015.northeastphp.org	Boston, MA	US	22-23/08
Laracon EU	http://laracon.eu/2015/	Amsterdam	Netherlands	25-26/08
WeCamp	http://weca.mp/2015/	De Kluut (Island)	Netherlands	25-29/08
PHP Summer Camp	http://2015.phpsummercamp.com	Rovinj	Croatia	26-29/08

Procedural PHP Manifesto

We are web site developers (a.k.a. webmasters) and we just want to get stuff done. We don't need Object Orientation and we don't need Design Patters and other boring and not easy to learn and understand stuff to get in our way to get our sites up and running.

And that's why our values are:

Procedural Code over Object Orientation

No one actually needs OO to develop web applications
Classes with only static functions are ok, since it's just a way to keep functions in one place. And is still procedural

Explicitly load what you need over autoloaders

	# coding: utf-8
	from urllib.request import urlopen
	from xml.etree import ElementTree


	class Budget(object):
	'''2014 World Cup budget parser.'''

	def __init__(self, data_url):
	'''Parses XML from data_url.'''


	function fuck() {
	killall -9 $2;
	if [ $? == 0 ]
	then
	echo
	echo " (╯°□°）╯︵$(echo $2\|flip &2>/dev/null)"
	echo
	fi
	}


	hello:
	@echo "Hello! use other targets!"

	deploy:
	git reset --hard -q
	git pull -q
	rm -rf bin/
	php composer.phar install --no-progress --no-dev -o --quiet
	rm -rf app/cache/*

	// Just before switching jobs:
	// Add one of these.
	// Preferably into the same commit where you do a large merge.
	//
	// This started as a tweet with a joke of "C++ pro-tip: #define private public",
	// and then it quickly escalated into more and more evil suggestions.
	// I've tried to capture interesting suggestions here.
	//
	// Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_,
	// @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant,

	<?php
	function it($m,$p){echo ($p?'✔︎':'✘')." It $m\n"; if(!$p){$GLOBALS['f']=1;}}function done(){if(@$GLOBALS['f'])die(1);}