renato-zannon’s gists

renato-zannon / named_dynamic_methods.rb

Created September 20, 2011 13:53

A simple practice to help your fellow workers navigate your dynamic ruby code

	# It's common, while creating a bunch of very similar methods, to create
	# a loop to define them all at once. (Very simple) example follows:

	week_days = %w[sunday monday tuesday wednesday thursday friday saturday]

	week_days.each do \|day\|
	define_method("events_on_#{day}") do
	events.select { \|event\| event.day == day }
	end
	end

renato-zannon / gist:1290010

Created October 15, 2011 19:14

Inject alternate implementation

	module Inject
	class Injector
	def self.inject(*args, &block)
	options = args.last.kind_of?(Hash) ? args.pop : {}
	target = options[:receiver] \|\| block.binding.eval("self")

	modules = args

	modules.each { \|mod\| mod.before_inject(target) if mod.respond_to?(:before_inject)}
	return_value = new(modules).inject_into(target, &block)

renato-zannon / gist:1311185

Created October 25, 2011 03:09

	import Control.Monad

	data Tree a = EmptyTree \| Node a (Tree a) (Tree a)

	(<<) EmptyTree value = Node value EmptyTree EmptyTree
	(<<) (Node value left right) newValue = if newValue < value
	then Node value (left << newValue) right
	else Node value left (right << newValue)

	toArray EmptyTree = []

renato-zannon / xmonad-unity.desktop

Created January 13, 2012 13:18

Unity Panel + XMonad config

	# /usr/share/xsessions/xmonad-unity.desktop

	[Desktop Entry]
	Encoding=UTF-8
	Name=XMonad/Unity
	Comment=Xmonad+Unity
	Exec=gnome-session --session=xmonad_unity
	Icon=xmonad.png
	Type=Application

renato-zannon / user.rb

Created June 9, 2012 05:33

Strategy pattern to follow users

	class User < Struct.new(:username, :private)
	alias_method :private?, :private

	def follow
	follow_strategy.call
	end

	private

	def follow_strategy

renato-zannon / module.rb

Created September 4, 2012 04:07

Subclass module + use module_eval to define methods

	class AttributeAccessor < Module
	def initialize(name)
	@name = name
	module_eval { define_accessors }
	end

	private

	def define_accessors
	ivar = "@#{@name}"

renato-zannon / fiber-example.rb

Created February 2, 2013 18:31

	# Depends on gems eventmachine, em-http-request,
	# and em-resolv-replace (for # async DNS)

	require 'eventmachine'
	require 'em-http'
	require 'fiber'
	require 'em-resolv-replace'

	def make_request_to(url)
	connection = EventMachine::HttpRequest.new(url)

renato-zannon / nth_child.rb

Created May 13, 2013 14:42

renato-zannon / patch.rb

Created March 20, 2014 19:21

Fix rails 2.3 filter_parameter_logging for ruby 2.x

	# The filter_parameter_logging method, used to filter request parameters
	# (such as passwords) from the log, defines a protected method called
	# filter_parameter when called. Its existence is later tested using
	# respond_to?, without the include_private parameter. Due to the respond_to?
	# behavior change, the method existence is never detected, and parameter
	# filtering stops working.
	require 'action_controller'

	module ParameterFilterPatch
	def respond_to?(method, include_private = false)

renato-zannon / results

Created June 5, 2014 22:11

Rust: Semaphores vs channels

	running 2 tests
	test with_channels ... bench: 876410 ns/iter (+/- 655463)
	test with_semaphores ... bench: 513476 ns/iter (+/- 711503)

	test result: ok. 0 passed; 0 failed; 0 ignored; 2 measured

Renato Zannon renato-zannon