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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)

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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

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# 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)

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# 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("")

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# within your vhost...
RewriteEngine On

# create a variable called 'ps' which stores the original scheme
RewriteCond %{HTTPS} =on
RewriteRule ^(.+)$ - [env=ps:https]
RewriteCond %{HTTPS} !=on
RewriteRule ^(.+)$ - [env=ps:http]

# if the hostname (in this case, including the subdomain) does not match our desired hostname

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# is this not already provided somewhere?
# even_distribution?([50,49,53]) => true
# even_distribution?(50,33,70]) => false
def even_distribution?(array, slack = 0.1)
  exact_distribution = 1 / array.size.to_f
  slack_val = exact_distribution * slack
  ceil = exact_distribution + slack_val
  floor = exact_distribution - slack_val
  total = array.reduce{ |v,t| v + t }.to_f
  array.each do |element|

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#!/bin/bash

# domainavailable
#   Fast, domain name checker to use from the shell
#   Use globs for real fun:
#     domainavailable blah{1..3}.{com,net,org,co.uk}
# Inspired by foca / giles:
#   http://gilesbowkett.blogspot.com/2009/02/simple-bash-domain-availability.html

trap 'exit 1' INT TERM EXIT

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# From http://www.nitrxgen.net/factorialcalc.php

The resulting factorial of 4,000! is 12,674 digits long.
The result also contains 999 trailing zeroes (which constitutes to 7.88% of the whole number)

182880195151406501331474317557391904421737771073043921970645269542089597979731773648503702868704841073364430415692855717546724618615435573339426156179
569967167452848315973174988187609374828049804195765129487206105589281297880978006205934295377053267406244538842850917439517567461444473623787224694361
945759295799001142129733606589980739777146972612050486637259363374904040660979666371702540213488009442803422853559466496813162601634597438035771759033
947331700768417647790821668911845293242300334141454978018325982185184065522570973925300245827389829191044067821687088714956035019058673999662987985348
777479231791957914165044080548789747703086507071208788376249865760733404494148545783673833017157063581941274008498556040804733051968334824080794209642