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sauloperez / gist:5788542
Created June 15, 2013 15:51
Latex graphicx package configuration to allow figures span two columns
\ifCLASSINFOpdf
\usepackage[pdftex]{graphicx}
% declare the path(s) where your graphic files are
\graphicspath{{../pdf/}{../jpeg/}{./image/}}
% and their extensions so you won't have to specify these with
% every instance of \includegraphics
\DeclareGraphicsExtensions{.pdf,.jpeg,.png,.jpg}
\else
% or other class option (dvipsone, dvipdf, if not using dvips). graphicx
% will default to the driver specified in the system graphics.cfg if no
@sauloperez
sauloperez / signal_catching.rb
Last active November 11, 2020 11:25
How to catch SIGINT and SIGTERM signals in Ruby
# Signal catching
def shut_down
puts "\nShutting down gracefully..."
sleep 1
end
puts "I have PID #{Process.pid}"
# Trap ^C
Signal.trap("INT") {
@sauloperez
sauloperez / gist:7026493
Created October 17, 2013 15:01
JavaScript WebSockets adapter
// WebSocket Adapter
// -------------------
// It forwards all WebSocket events to the application
// event aggregator (or event bus). The intention of
// this is to decouple the specific websockets implementation
// from the application's use of it.
var WSAdapter = function(options) {
if (options && !options.eventBus) {
@sauloperez
sauloperez / https
Created February 4, 2014 09:13
Test HTTPS connection from Ruby
#!/usr/bin/env ruby
# Usage: $ https <host> [path]
require 'net/https'
h = Net::HTTP.new(ARGV[0], 443)
h.use_ssl = true
h.ssl_version = :SSLv3
h.verify_mode = OpenSSL::SSL::VERIFY_PEER
@sauloperez
sauloperez / gist:8971804
Created February 13, 2014 08:42
Get Rails callback names
User._destroy_callbacks.select { |cb| cb.kind.eql?(:before) }.collect(&:filter).each { |c| puts "#{c}\n" }
description "start passenger stand-alone"
# When to start the service
start on filesystem or runlevel [2345]
# When to stop the service
stop on runlevel [!2345]
# Automatically restart process if crashed
respawn
@sauloperez
sauloperez / gist:771cfba97cf6e2397e95
Created May 2, 2014 08:54
IEEE locally-assigned MAC addresses
# Generates IEEE locally-assigned MAC addresses
# @return [String] following the pattern [0-9A-Fa-f][26AEae][0-9A-Fa-f]{10}
def mac
mac = ('%0.2X' % rand(256))[0, 1] + %w(2 6 A E).sample
mac << (1..5).map { "%0.2X" % rand(256) }.join
end
# Some required stuff
sudo apt-get install -y git build-essential curl
# Install RVM and Ruby 2.1.2
gpg --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3
curl -sSL https://get.rvm.io | bash -s stable
source ~/.rvm/scripts/rvm
rvm install 2.1.2
rvm use --default 2.1.2
@sauloperez
sauloperez / toc.rb
Created October 21, 2016 10:44
Markdown TOC generator
#!/usr/bin/env ruby
FILENAME = ARGV[0]
File.open(FILENAME, 'r') do |f|
f.each_line do |line|
forbidden_words = ['Table of contents', 'define', 'pragma']
next if !line.start_with?("#") || forbidden_words.any? { |w| line =~ /#{w}/ }
title = line.gsub("#", "").strip
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sauloperez / beat_the_refactoring_blerch
Created April 20, 2017 12:20
Beat the refactoring blerch
Have you seen Matthew Inman's (The Oatmeal) comic about why he runs? It's
a classic. In it he talks about his inspiration for taking up long-distance
running. He imagines his tendency to slack off and sit on the couch as a little
creature he calls "The Blerch". It follows him around, tempting him to stop
moving and scarf down junk food.
I run too, though nothing close to the distances Inman runs. In my experience,
refactoring as a skill has a lot in common with running or any other athletic
sport. You can exercise your refactoring muscles, by deliberately working
through the steps with discipline, like we talked about in the last email. As