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def original_method(a, b)
  puts "Called with #{a} and #{b}"
  if block_given?
    puts "Calling the block"
    yield
  end
end

def wrapper1(*args) # WRONG: doesn't pass the block
  puts "Hi I'm wrapper1"

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This is my best try at transcribing of the lightning talk I gave at RUG::B on April 2016. Due to poor time management (LOL) the delivery was rushed and some examples were skipped, I hope having them posted here makes them more useful.

xargs

xargs is a small but very useful program that is installed in most if not all of your computers¹. Many of you probably know it. Those who don't will learn something really useful, but those who do will learn a couple of cool tricks, too.

Why xargs

You might have heard about the Unix philosophy:

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# Changing terminal color in MacOSX when SSHing (so you know at a glance that you're no longer in Kansas)
# Adapted from http://www.rngtng.com/2011/01/14/mac-os-x-terminal-visual-indication-for-your-ssh-connection/
# 1. Create a theme in your terminal setting with the name "SSH" and the desired colors, background, etc.
# 2. Add this to your .bash_profile (or .bashrc, I always forget the difference ;))
# 3. Optional but useful: in the terminal, go to Settings > Startup and set "New tabs open with" to
#    "default settings" (otherwise, if you open a new tab from the changed one, you get a local tab with
#    the SSH colors)

function tabc() {
  NAME=$1; if [ -z "$NAME" ]; then NAME="Default"; fi # if you have trouble with this, change

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New beginners group starting next Monday (2018-11-05 19:00)

Hi!

We're starting a new beginners group next Monday. Most people that already confirmed that they'll be part of it attended the last Rails Girls Berlin Beginners Workshop, but feel free to join too if you didn't, it doesn't matter. The group will study the basics of programming starting from scratch, and following this curriculum: http://ruby-for-beginners.rubymonstas.org/

The group meets every Monday at 19:00 in Friedrichschain: http://rubymonstas.org/location.html There's more info about the group at http://rubymonstas.org/

The meetup usually lasts until 21:30/22:00, with a break in between. Feel free to bring snacks!

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class RespondTo
  def initialize(method_name)
    @method_name = method_name
  end

  def ===(object)
    object.respond_to?(@method_name)
  end
end

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FROM ruby:2.4

ADD Gemfile /opt/
ADD Gemfile.lock /opt/
WORKDIR /opt

RUN bundle install

CMD bundle exec nanoc -v

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require 'sinatra/base'

class A < Sinatra::Base
  get '/this' do
    'this from A'
  end
end

class B < Sinatra::Base
  get '/that' do

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class CachedEnumerable
  include Enumerable

  def initialize(wrapped = nil)
    @enumerator = case wrapped
    when Enumerator
      wrapped
    when Enumerable
      wrapped.to_enum
    when NilClass

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No soy un experto crítico gastronómico pero estos sitios me gustan:

Alemanes

• Gugelhof (Alsaciano) https://foursquare.com/v/gugelhof/4adcda74f964a5207f4521e3
• Max & Moritz https://foursquare.com/v/wirtshaus-max-und-moritz/4af30e0ff964a52028ea21e3
• Imbiss 204 https://foursquare.com/v/imbiss-204/4be4465a2468c928ba85fe42
• Der Butt (Pescado, está en Potsdam) https://foursquare.com/v/der-butt/4e1705b6c65be9c55e8a79f1
• Schwarzwaldstuben https://foursquare.com/v/schwarzwaldstuben/4adcda72f964a5204b4521e3
• Die Henne https://foursquare.com/v/die-henne/4adcda77f964a520254621e3

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class A
  private

  def self.a
    :a
  end
end

class B
  class << self