briandoll

public void testSnappyHappy() {  
  Map snappy = null;  
  Map happy = new HashMap();  

  snappy = addToMap(snappy, "foo", "bar");  
  happy = addToMap(happy, "foo", "bar");  
}  

briandoll

# From Alex Chaffee
# http://pivotallabs.com/users/alex/blog/articles/865-monkey-patch-du-jour
# Add caller line number to sql logging
module ActiveRecord
  module ConnectionAdapters
    class AbstractAdapter
      def log_info(sql, name, ms)
        if @logger && @logger.debug?
          c = caller.detect{|line| line !~ /(activerecord|active_support|__DELEGATION__)/i}
          c.gsub!("#{File.expand_path(File.dirname(RAILS_ROOT))}/", '') if defined?(RAILS_ROOT)

briandoll

module RailsNamingConventions

  def file_name_to_class_name(file_name)
    file_name.split(".rb")[0].classify    
  end

end

briandoll

class Test::Unit::TestCase

  def assert_each(assertions)
    error_messages = ""
    assertions.each do |assertion, message, *variables|
      template = message.nil? ? "<?> is not true." : message
      if variables.empty?
        msg = build_message(nil, template, assertion)
      else
        msg = build_message(nil, template, *variables)

briandoll

The interesting world of the asterisk in Ruby:

Of course we can multiply with it and it's quite handy in a regex, but there are two other interesting uses.

First, variable arguments in the method signature:

def hmm(*args)
  first, *rest = *args
  puts first.inspect
  puts rest.inspect

briandoll

class ActiveRecord::Base
  def self.table_name_prefix
    "appname."
  end
end

class TransactionalBase < ActiveRecord::Base
  self.abstract_class = true
  establish_connection "#{RAILS_ENV}-transactional"
  

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class Hospital < AcitveRecord::Base
  has_many :hospital_doctors
  # Note: has_many_elsewhere is provided by the st-elsewhere gem
  has_many_elsewhere :doctors, :through => :hospital_doctors
end

class HospitalDoctor < ActiveRecord::Base
  belongs_to :hospital
  belongs_to :doctor
end

briandoll

# Posting XML using net/http in ruby

# This request will hang until it times out (defaulting to 60 seconds)
uri = URI.parse(SOME_SERVICE_URL)
response, data = Net::HTTP.start(uri.host, uri.port) do |h|
  h.post(uri.path, some_xml)
end

# This works as expected
uri = URI.parse(SOME_SERVICE_URL)

briandoll

#!/usr/bin/env bash
# commit-derby
# Display a list of committers with the number of commits they have made in the last 30 days
#

COMMITTERS=`git log --format='%an' --since='30 days ago' | sort | uniq`

echo "In the last month, we've seen:"
for COMMITTER in ${COMMITTERS}; do
  COMMITS=`git log --format='%an' --since='30 days ago' | sort | grep ${COMMITTER} | wc -l`

briandoll

# Ever forget the hostname of that server you logged into last week? 
# Quickly get a chronological listing of hosts you've come to know...

require 'rubygems'
require 'net/ssh'

def who_do_i_know?
  who = []
  known_host_files = Net::SSH::KnownHosts.hostfiles({})
  scanner = StringScanner.new("")