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View flatten-it.rb
module ArrayUtils
def self.flatten(array, result=[])
array = Array(array)
array.each do |entry|
case entry
when Array
flatten entry, result
result << entry
View gist:9ace6a70370f6d1a1511,:b)
ss = [,2),,4)]
p{|a,b| "#{a} #{b}" }
# => ["#<struct S a=1, b=2> ", "#<struct S a=3, b=4> "]
class S ; def to_ary ; to_a ; end ; end
p{|a,b| "#{a} #{b}" }
# => ["1 2", "3 4"]
View reversible_queue.rb
# Works much like Ruby's native Queue, but provides an #undeq
# method, which Ruby's own Queue does not have.
class ReversibleQueue
def initialize
@queue_array = []
@threads_waiting = []
@mutex =
# Push an object onto the tail of the queue
View colortest
#!/usr/bin/env ruby
ColorNameSequence = %w[
View require_limit_for_mysql_text.rb
# == config/initializers/require_limit_for_mysql_text.rb ==
# Fail when an attempt is made to specify a MySQL text
# columnn in a migration without providing a :limit value.
# This helps to prevent accidentally defining a 64K column
# (default) when a 16MB or 4GB coumn is desired.
# Note that MySQL silently truncates the data when it is
# too long for the column, so problems are only apparent
# later when attempting to retrieve the data (if then).
View n-is-the-loneliest-number.txt
One is the loneliest number that you'll ever do
Two can be as bad as one, well it's the loneliest number since the number one
Three is really not so bad, but it can still be lonely, and that's really sad
Four is really no big deal, so if you think it's lonely, then you'd best get real
Five is practically a crowd, and if you're tryin' to think, it can seem really loud.
Five is the loneliest number
Five is the loneliest number
Five is the loneliest number since the number four dum dum-dum dum-dum
View yaml_value_extraction_benchmarks.rb
require 'yaml'
require 'benchmark'
def make_yaml_string(num_entries=500)
entry_nums = (0...num_entries).to_a
result = ''
entry_nums.each do |n|
result << "something_#{n}: #{Random.rand}\n"
View trinary.rb
class Trinary
class << self
def ~ ; ~new ; end
def -@ ; -new ; end
def +@ ; +new ; end
def initialize(digits=[])
@digits = digits
View deferred_uniqueness_validations.rb
# ./config/initializers/deferred_uniqueness_validations.rb
# This initializer adds support for deferred processing of
# ActiveRecord uniqueness validations. When a uniqueness
# validation is deferred using the :deferred => true option, it is
# not checked before save. Instead, if there is a uniqueness
# constraint defined for the column in the database, and if the
# save operation raises an ActiveRecord::RecordNotUnique
# exception, then the validation is performed so that the precise
# cause can be determined and the appropriate error information
View fiber_demo.rb
fib = do |val|
puts ' -- 2 --'
puts 'fiber started & got: ' + val
puts 'now yield with "1st yield"'
val = Fiber.yield('fiber yield 1')
puts ' -- 4 --'
puts '1st yield got: ' + val
puts 'now yield with "2nd yield"'