"\none\n two\n  three".scan(/^( *)\w+/).flatten #=> ["", " ", "  "]

# chip away at the bonuses play through amounts
    bet_through_credit_remaining = self.wager
    self.user.bonuses.ranked.each do |bonus|
...

user_id = xx
users = [....]

...

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

input = [9,9,9,9,9,9,9,9,9,9,9,9]
input.uniq == 9

...

a = ["a", "b", "c", "d"]
b = [1, 0, 0, 1]

...

def disease_search(query)
    treatment_results = Array.new
    symptom_results = Array.new
...

def disease_search(query)
    treatment_results = Array.new
    symptom_results = Array.new
...

# http://www.ruby-forum.com/topic/163649
class Array
...

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

class Array
    
  def count_by(&block)
...

def array_to_params(param_name, params)
  unless params.is_a?(Array)
    result = "&#{param_name}[0]=#{params}"
...

grouped = [] 
arr = [#<Foo id: 1, status_id: 2, profile_id: 3>,#<Foo id: 2, status_id: 2, profile_id: 3>,#<Foo id: 3, status_id: 1, profile_id: 3>]
arr_copy = arr
...

User has_many Students
Student has_one ReportCard
ReportCard has_many Metrics
...

y_max = 10

arr_data.each do |arr|
...

tmp = reply.case.users.map(&:email)
tmp.delete(reply.created_by.email)
tmp.join(',')
...

def self.all_leaves
    leaves = []
    Category.roots.each do |category|
...

class Array
  # does a kind of ZIP compression for integer arrays
  # examples:
...

# sum an an array's elements
def sum_row(a)
  sum = 0
...

array_with_blank_strings.compact.reject(&:blank?)

>> array_with_blank_strings = ["Item 1", "Item 2", " ", "Item 3", nil]
...

def browser?(b)
    user_agents = {
      :ff   => /Firefox/,
...

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

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

artists = [1, 2, 3]
    column_1 = artists[0..artists.size/2]
    column_2 = artists[artists.size/2+1..artists.size]

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