a = {}
a["test"] = [] if a["test"].nil?
a["test"] << 5

f = { "user" => { "name" => "Tom", "message" => { "count" => 24, "last" => "2011-02-05" } } }
q = "user/message/last"
v = q.split("/")
...

openid_mapping = {
  :email => ["email", "http://axschema.org/contact/email"], 
  :name => ["fullname", "http://axschema.org/namePerson"]
...

# Initial attributes Hash
# 
attributes = {
...

pages.keys.each do |k|

      logger.debug "Pages for #{k} channel:"
...

so whats so magical about this Hash?
...

def get_roles()
    roles = []
    store = {}
...

# call-seq:
  #   StatisticsUtils.merge_sum(hash1, hash2, ...) -> merged_hash
  #
...

require 'hpricot'

class Parser
...

s = "The green hat is the twin of the green hat"
h = Hash.new(0)
s.split.each do |w|
...

class String
  def dasherize
...

class Array
  def to_h
    hash = {}
...

def translation_links
    lang = [
      %w[en english us], 
...

FIELDS = [ 'first', 'last',      'band' ]
DATA   = [['Kurt',  'Cobain',    'Nirvana'],
          ['Jimi',  'Page',      'Led Zeppelin'],
...

pools = {1 => [1,2,3], 2=> [3,4,5], 3=> [5,6,7]}
intersection = []
pools.each do |k,v|
...

times.each do |time|
      events.each do |event|
        if time.strftime("%I:%M %p") == event.datetime.strftime("%I:%M %p")
...

module Keys_to_Meths
  def method_missing(meth, *args)
    if meth.to_s[-1] == 61 #if last char is an equal sign
...

require 'net/http'
require 'rubygems'
require 'xmlsimple'
...

require 'erb'

# GOAL: render the template with the following vars
...

class Hash
  def fetch_all(key)
    results = []
...

<table class="charge">
  <tr>
    <td colspan="100%" class="mainHeader"><%=@label.label%></td>
...