levinalex

class Date
  def minus_with_date(other)
    if other.class == Date
      (self.minus_without_date(other)).days
    else
      minus_without_date(other)
    end
  end
  alias_method :minus_without_date, :-
  alias_method :-, :minus_with_date

levinalex

  # return the date at which the week with the given number starts
  # (ISO-8601)
  #
  #  Date.beginning_of_numbered_week(2003, 52)   # => 2003-12-22
  #  Date.beginning_of_numbered_week("2003W52")  # => 2003-12-22
  #
  def self.beginning_of_numbered_week(year, week = nil)
    if week
      year, week = year.to_i, week.to_i
    else

levinalex

''=~( '(?{' .('`' |'%') .('[' ^'-')
.('`' |'!') .('`' |',') .'"'. '\\$'
.'==' .('[' ^'+') .('`' |'/') .('['
^'+') .'||' .(';' &'=') .(';' &'=')
.';-' .'-'. '\\$' .'=;' .('[' ^'(')
.('[' ^'.') .('`' |'"') .('!' ^'+')
.'_\\{' .'(\\$' .';=('. '\\$=|' ."\|".( '`'^'.'
).(('`')| '/').').' .'\\"'.+( '{'^'['). ('`'|'"') .('`'|'/'
).('['^'/') .('['^'/'). ('`'|',').( '`'|('%')). '\\".\\"'.(
'['^('(')).

levinalex

module Enumerable
  def all_equal?
    inject { |a,b| break false unless a == b; b } != false
  end
end

levinalex

# 
# Rubyquiz #65 (Splitting the Loot)
# Levin Alexander <levin@grundeis.net>
#

module Enumerable
  def sum; inject { |a,b| a+b } end

  def all_equal?
    inject { |a,b| break false unless a == b; b } != false

levinalex

# print a sorted list of all classes in the ruby vm sorted by count
#
def object_statistics(minimum = 2)
  counts = {}
  ObjectSpace.each_object do |o| 
    counts[o.class] = (counts[o.class] || 0) + 1
  end
  counts.to_a.reject {|k,v| v < minimum}.sort_by { |k,v| -v }.each { |k,v| puts "%6d " % v + k.to_s }
  nil
end

levinalex

#!/bin/bash
#
# some oddities with rails constant lookup
#
# "Foo::Bar" will return the toplevel constant "Bar" the first time it is referenced
# and fail the second time.
#
# (if Foo is a class instead of a module, the second call will print a warning and 
# not raise a NameError)
#

levinalex

>> Foo = 3
=> 3
>> class Bar; end
=> nil
>> module Fred; end
=> nil
>> Fred::Foo
NameError: uninitialized constant Fred::Foo
	from (irb):4
>> Bar::Foo

levinalex

#!/usr/bin/env ruby
#
# burning_down_lighthouse
#
# very crude munin plugin that shows current open lighthouse tickets by milestone

require 'rubygems'
require 'lighthouse'
require 'yaml'

levinalex

#!/usr/bin/env ruby
#
# say a random word from the dictionary at least every ~n seconds
#
# uses "say" (comes with OSX) and growlnotify (comes with growl)

$f = File.open("/usr/share/dict/words")
$interval = ARGV[0].to_f || 0

$f.sort_by{rand}.each do |l|