Fabio Ribeiro faabiosr

There are three easy to make mistakes in go. I present them here in the way they are often found in the wild, not in the way that is easiest to understand.

All three of these mistakes have been made in Kubernetes code, getting past code review at least once each that I know of.

Loop variables are scoped outside the loop.

What do these lines do? Make predictions and then scroll down.

func print(pi *int) { fmt.Println(*pi) }

byte-size tuts

by alexander white ©

golang tutorials

Non-Fluent Respect\Validation

Hi! I'm one of the developers of Respect\Validation and other less known Respect components. Feel free to ask any questions here or on reddit.

There are many micro-frameworks that rely on magic methods. We don't. In this article I'm gonna explore the Respect\Validation API without fluent interfaces or magic methods. I'll use a traditional dependency injection approach.

The following validator was inspired by one of our README examples:

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

Custom rules on Respect/Validation

You may not know that [the most awesome validation engine for PHP][1] out there is [Respect/Validation][2]. If you do, this is tailored for you!

All rules on [Respect/Validation][2] are meant to be used together, composing a more complex validation rule that is closer to the domain of your application than the existing ones, let's try an example:

	#!/bin/bash
	if [ $EUID != 0 ]; then
	echo 'Você precisa ser root para instalar certificados.'
	exit $?
	fi

	# Diretório onde os certificados serão instalados
	cert_path=`openssl version -d\|sed 's/.\"\(.\)\"/\1/g'`/certs

	# Path para o certificado da Cielo

	# Hello, and welcome to makefile basics.
	#
	# You will learn why `make` is so great, and why, despite its "weird" syntax,
	# it is actually a highly expressive, efficient, and powerful way to build
	# programs.
	#
	# Once you're done here, go to
	# http://www.gnu.org/software/make/manual/make.html
	# to learn SOOOO much more.

	<?php

	use Behat\Behat\Context\Context;
	use Behat\Behat\Hook\Scope\BeforeScenarioScope;

	class FeatureContext implements Context {
	private $subContext;

	/** @BeforeScenario */
	public function gatherContexts(BeforeScenarioScope $scope)

	#/bin/bash

	##########################################################
	### INTRODUCTION
	##########################################################
	: '
	Install and configure R (Redis) + ELK server from scratch on CentOS 6.5.

	* Logstash version 1.4.2
	* Elasticsearch version 1.3.2

	# /etc/init/my-go-service.conf
	# My go service

	description "My go service"

	env DAEMON=/usr/local/bin/my-go-service
	env NAME=my-go-service

	start on filesystem or runlevel [2345]
	stop on runlevel [!2345]