melborne

class Filter
  class << self
    def filters
      @filters ||= {}
    end

    def add(name, &code)
      filters[name] = code
    end
  end

melborne

# Gviz sample:
# Graphviz Example: Undirected Graph Clusters | Graphviz - Graph Visualization Software
# http://www.graphviz.org/content/fdpclust
require "gviz"

Graph(:G, :graph) do
  global layout:'fdp'
  node :e
  subgraph(:clusterA) do
    route :a => :b

melborne

#election.rb
require "gviz"

header, *candidates = DATA.readlines.map(&:split)

Graph do
  global layout:'fdp'
  nodes shape:"plaintext", style:"filled", fillcolor:"white"
  node :election, shape:'doublecircle', label:"2014年\n東京都知事選挙", fillcolor:'orange'

melborne

require "RMagick"
include Magick

images = Dir.glob("*.png").sort_by { |n| n.sub(/\D+/,'').to_i }

anim = ImageList.new(*images)
anim.delay = 40
anim.write("anpan.gif")

melborne

# Batman equation for Gviz
# [geometry - Is this Batman equation for real? - Mathematics Stack Exchange](http://math.stackexchange.com/questions/54506/is-this-batman-equation-for-real 'geometry - Is this Batman equation for real? - Mathematics Stack Exchange')

def f1(x)
  Math.sqrt(1 - (x/7.0)**2) * 3
end

def f2(x)
  (x/2.0).abs - ((3*Math.sqrt(33)-7)/112.0)*x**2 - 3 + Math.sqrt((1 - ((x.abs - 2).abs - 1)**2).abs)
end

melborne

# Translate Let it Snow in the Terminal from Ruby to Ruby
#
# Original code:
#   ruby -e 'C=`stty size`.scan(/\d+/)[1].to_i;S=["2743".to_i(16)].pack("U*");a={}; \
#   puts "\e[2J";loop{a[rand(C)]=0;a.each{|x,o|;a[x]+=1;print "\e[#{o};#{x}H \
#   \e[#{a[x]};#{x}H#{S} \e[0;0H"};$stdout.flush;sleep 0.1}'
#
# Let it Snow in the Terminal of Mac OS X with This Command
# http://osxdaily.com/2013/12/06/snow-terminal-mac-os-x-command/
#

melborne

class F
  attr_reader :name, :path, :level
  def initialize(name, level=0)
    @name = File.basename(name)
    @path = File.expand_path(name)
    @level = level
  end

  def to_s
    "F: #{name}"

melborne

# Draw Ruby universe with gviz(graphviz wrapper in Ruby)
# try `gviz build [THIS_FILE]` at terminal

classes = ObjectSpace.each_object(Class)
                     .reject { |k| "#{k}".match /Gem|Thor|Gviz/ }

global layout:'fdp'
nodes style:'filled', colorscheme:'purd6'
edges color:'maroon'

melborne

# coding=utf-8

# This is an edited version of @ne_sachirou's String::INFINITY
# Range 'a' .. String::INFINITY (Ruby) - c4se記：さっちゃんですよ☆
# http://c4se.hatenablog.com/entry/2013/10/01/010305
# Diffs:
#   - Define StringInfinity#inspect
#   - Use Module#prepend
#   - Replace '==' to 'eqlual?' at #size to fix when last=='' passed
#   - Fix Range#size test

melborne

module AutoAttrSet
  def new(*args, &blk)
    obj = allocate
    obj.send(:initialize, *args, &blk)
    set_instance_variables(obj, args)
    obj
  end

  private
  def set_instance_variables(obj, args)