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    // This function logs a message to the browser's Javascript console
    // Tested with latest flash debug player (11.3.300.257) and latest Chrome (20.0.1132.57)
    // see http://stackoverflow.com/questions/864155/see-trace-of-flash-when-running-in-browser for original function
    public static function log(msg:String, caller:Object = null) : void {
        var str:String = "";
        if (caller) {
            str = getQualifiedClassName(caller);
            str += ":: ";
        }
        str += msg;

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require 'rake/task'

namespace :samples do
  # find all sub folders in directory, each sub folder represents a sample project
  Dir.glob('path/to/samples/*').select do |file|
    if File.directory?(file)
      app_name = file.split('/').last
      desc "Run sample #{file}"
      task app_name do
        Rake::Task['code:compile'].invoke # some task to compile code & samples

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#!/bin/sh

set -e

/etc/init.d/elasticsearch stop
/usr/local/share/elasticsearch/bin/service/elasticsearch remove
rm -rf /usr/local/share/elasticsearch

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My git aliases

Most of the git aliases are standard abbrevations. Similar to other alias definitions I use a different output format (source).

On projects with more than a couple of authors it might be useful to show only commits by oneself: git lg-me

One alias that I found very useful especially when following the Github workflow is to check which pull requests got merged into the main development branch. It's also useful to see how many PRs were added inbetween releases / tags.

git log-grep v0.1.0..v.2.1

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# Defines the method say_hello on an instance object
# this is very similar to:
#   def say_hello
#     puts "Hello"
#   end
#
class Test
  define_method(:say_hello){ puts "Hello" }
end

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class Test
  def add_hello
    self.class.send(:define_method, :say_hello){ puts "Hello world" }
  end
end

t = Test.new
t.say_hello     # => NoMethodError: undefined method `say_hello'
t.add_hello     # => adds the function at runtime
t.say_hello     # => "Hello world"

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# Virtus example to overload an existing setter

require 'virtus'

module A
  include Virtus.module
  attribute :foo, String, default: 'FOO'
end

module B

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# using arrays
(1..100).each{|n|a=[n%3==0&&'fizz',n%5==0&&'buzz'].reject{|n|!n}.join;puts a.empty? ? n:a}
(1..100).each{|n|a=[n%3!=0?'':'fizz',n%5!=0?'':'buzz'].join;puts a.empty?? n:a}

# only strings
(1..100).each{|n|a=(n%3>0?'':'fizz')+(n%5>0?'':'buzz');puts a.empty?? n:a}

# using hashes
(1..100).each{|n|a=Hash["fizz",3,"buzz",5].map{|k,v|k if n%v==0}.join;puts a.empty?? n:a}

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# put the following content into ~/.vagrant/Vagrantfile
# install plugin vagrant-proxyconf: vagrant plugin install vagrant-proxyconf

VAGRANTFILE_API_VERSION = "2"

def get_proxy_url
  # Doesn't support different proxies for different protocols at present
  host_proxy = ENV['http_proxy'] || ENV['HTTP_PROXY'] || ENV['https_proxy'] || ENV["HTTPS_PROXY"]
  if host_proxy
    uri = URI(host_proxy)

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HOSTS:
  centos-7-x64-master:
    roles:
      - master
      - agent
    platform: el-7-x86_64
    hypervisor: vagrant
    box: puppetlabs/centos-7.2-64-nocm
    vagrant_memsize: 2048   # increase memory or OutOfMemoryError will occur
    vagrant_cpus: 2         # to speed things up a little