jonelf

require 'rubygems'
require 'graphviz'

@min_level = 1
@max_level = 12
@max_depth = 10
start_level = 6

@g = GraphViz.new(:G, :type => "strict digraph" )

jonelf

# 2011-04-08 jonelf@gmail.com

require 'base64'

def caesar(text,n)
  alphas=('A'..'Z').to_a*2
  text.tr('A-Z', alphas[n..n+26].join)
end

def histogram(message)

jonelf

require 'base64'

def histogram(arr)
    arr.inject(Hash.new(0)) { |h, k| h[k] += 1; h}
end
              
def graph_histogram(h, skip_less_than)
   h.to_a.select{|v| v[1]>=skip_less_than}.sort_by{|kv| kv[1]*-1}.
     map{|a| "#{a[0]} |#{('+'*a[1])}#{a[1].to_s}\n"}.

jonelf

#!usr/bin/env ruby
# 2011-04-11 jonelf@gmail.com

# Sudoku solver refactored from Luddite Geek http://theludditegeek.com/blog/?page_id=92
# and that in turn is a translation from the Python solution by Peter Norvig
# http://norvig.com/sudoku.html

## Throughout this program we have:
##   r is a row,    e.g. 'A'
##   c is a column, e.g. '3'

jonelf

# Sudoku solver in CoffeeScript based on the Python solution by Peter Norvig
# http://norvig.com/sudoku.html
# 2011-04-19 jonelf@gmail.com
# 
# Throughout this program we have:
#   r is a row,    e.g. 'A'
#   c is a column, e.g. '3'
#   s is a square, e.g. 'A3'
#   d is a digit,  e.g. '9'
#   u is a unit,   e.g. ['A1','B1','C1','D1','E1','F1','G1','H1','I1']

jonelf

[i, o, n, e] = [0, '', prompt('Enter a number between 1 and 9998 whose digits are not all identical'), '']
while n!=6174
  n = e + n
  q = (n='0'+n if !n[3]) for x in [0..2]
  n ?= q
  o+=n+"\n" if i
  a = n.split(e).sort().join(e)
  n = a.split(e).reverse().join(e)
  o += n + ' - ' + a + ' = '
  n-=a

jonelf

# Searches for self-descriptive numbers
# http://en.wikipedia.org/wiki/Self-descriptive_number 

module Enumerable
  def all_with_index?
    each_with_index{|e,i| return false unless yield(e,i)}
    true
  end
end
    

jonelf

(import (javax.swing JFrame JPanel)
        (java.awt Color Dimension Graphics)
        (java.awt.image BufferedImage WritableRaster))

(defn construct-frame [width height panel]
  "Creates and displays a JFrame of the given dimensions with
  the panel added to it"
  (let [frame (JFrame.)]
      (.setPreferredSize panel (Dimension. width height))
      (doto frame

jonelf

# Ruby
# Suppose Mr. and Mrs. Smith tell you they have two children, one of 
# whom is a girl. What is the probability that the other is a girl?
# http://www.whydomath.org/Reading_Room_Material/ian_stewart/9609.html
1.upto(10) do |n|
  siblings = []
  # Create a bunch of randomized pairs of children
  1.upto(10000) do 
    child1 = rand(2) == 0 ? :boy : :girl 
    child2 = rand(2) == 0 ? :boy : :girl 

jonelf

# You've been told that the Larsson family has four children
# and that three of them are girls. What's that chance that
# the fourth one is also a girl?
# This is a brute force way to settle that.
sibling_count = 4

1.upto(10) do |n|
  families = []
  # Create a bunch of randomized families
  1.upto(sibling_count * 5000) do