stevecj

module ArrayUtils
  def self.flatten(array, result=[])
    array = Array(array)
    array.each do |entry|
      case entry
      when Array
        flatten entry, result
      else
        result << entry
      end

stevecj

S=Struct.new(:a,:b)
ss = [S.new(1,2), S.new(3,4)]

p ss.map{|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 ss.map{|a,b| "#{a} #{b}" }
# => ["1 2", "3 4"]

stevecj

# 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           = Mutex.new
  end

  # Push an object onto the tail of the queue

stevecj

#!/usr/bin/env ruby

ColorNameSequence = %w[
  Black
  Red
  Green
  Yellow
  Blue
  Magenta
  Cyan

stevecj

# == 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).

stevecj

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

stevecj

require 'yaml'
require 'benchmark'

def make_yaml_string(num_entries=500)
  entry_nums = (0...num_entries).to_a
  entry_nums.shuffle!
  result = ''
  entry_nums.each do |n|
    result << "something_#{n}: #{Random.rand}\n"
  end

stevecj

class Trinary
  class << self
    def ~  ; ~new ; end
    def -@ ; -new ; end
    def +@ ; +new ; end
  end

  def initialize(digits=[])
    @digits = digits
  end

stevecj

# ./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

stevecj

fib = Fiber.new 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"'