Rubyize this : 4th edition - RefactorMyCode.com

Welcome to the 4th edition of Rubyize this! (http://www.rubyfleebie.com/rubyize-this-4th-edition) I have an array of insects and I want to be able to display the name, the iq and the annoyance factor of every members of a certain type. This "solution" works but has a ruby rating of 0.5/5. Moreover, it only works for butterflies... which feels rather incomplete and limiting. Remove stuff, add stuff and move stuff around. This dumb code must get smart and pretty!

class Bug
	attr_accessor :type
	attr_accessor :name
	attr_accessor :iq
	attr_accessor :annoyance_factor	
	
	def initialize(name,type,iq,annoyance_factor)
		if !type
			@type="spider"
		else
			@type=type
		end
		
		if !name
			@name="unnamed"
		else
			@name=name
		end		
		
		if !iq
			@iq = 8
		else
			@iq = iq
		end
		
		if !annoyance_factor
			@annoyance_factor = 4
		else
			@annoyance_factor = annoyance_factor
		end	
	end	
end

def keep_butterflies(bugs)
	butterflies = Array.new
	bugs.each do |bug|
		if bug.type == "butterfly"
			butterflies.push(bug)
		end
	end	
	return butterflies
end

#create some bugs!
bugs = Array.new
bugs.push(Bug.new("ron","spider","4","2"))
bugs.push(Bug.new("don","spider","2","3"))
bugs.push(Bug.new("jake","ant","9","4"))
bugs.push(Bug.new("chris","ladybug","2","4"))
bugs.push(Bug.new("fred","cockchaffer","0","5"))
bugs.push(Bug.new("greg","butterfly","2","0"))
bugs.push(Bug.new("jason","butterfly","0","2"))

butterflies=keep_butterflies(bugs)

butterflies.each do |butterfly|
	puts "I am a butterfly and my name is #{butterfly.name}. I have an IQ of #{butterfly.iq} and an annoyance factor of #{butterfly.annoyance_factor}"
end

Refactorings

No refactoring yet !

Julio

October 23, 2007, October 23, 2007 13:30, permalink

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class Bug
  attr_accessor :type
  attr_accessor :name
  attr_accessor :iq
  attr_accessor :annoyance_factor	
	
  def initialize(name="unnamed",type="spider",iq=8,annoyance_factor=4)
    @annoyance_factor = annoyance_factor
    @type=type
    @name=name
    @iq = iq
  end

  def keep_butterflies(bugs)
    bugs.reject {|bug| bug.type != "butterfly" }
  end

  def create_bugs
    bugs = []
    bugs << Bug.new("ron","spider","4","2")
    bugs << Bug.new("don","spider","2","3")
    bugs << Bug.new("jake","ant","9","4")
    bugs << Bug.new("chris","ladybug","2","4")
    bugs << Bug.new("fred","cockchaffer","0","5")
    bugs << Bug.new("greg","butterfly","2","0")
    bugs << Bug.new("jason","butterfly","0","2")
    bugs
  end

  def print_butterflies
    keep_butterflies(create_bugs).each do |butterfly|
      puts "I am a butterfly and my name is #{butterfly.name}. I have an IQ of #{butterfly.iq} and an annoyance factor of #{butterfly.annoyance_factor}"
    end
  end

  print_butterflies

end

macournoyer

October 23, 2007, October 23, 2007 13:50, permalink

3 ratings. Login to rate!

Here's my take. Bug as no logic in it so we can use the Struct class.

class Bug < Struct.new(:name, :type, :iq, :annoyance_factor); end

#create some bugs!
bugs = [
  Bug.new("ron","spider","4","2"),
  Bug.new("don","spider","2","3"),
  Bug.new("jake","ant","9","4"),
  Bug.new("chris","ladybug","2","4"),
  Bug.new("fred","cockchaffer","0","5"),
  Bug.new("greg","butterfly","2","0"),
  Bug.new("jason","butterfly","0","2")
]

butterflies = bugs.select { |b| b.type == 'butterfly' }

butterflies.each do |butterfly|
	puts "I am a butterfly and my name is #{butterfly.name}. I have an IQ of #{butterfly.iq} and an annoyance factor of #{butterfly.annoyance_factor}"
end

jswanner

October 23, 2007, October 23, 2007 14:27, permalink

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class Bug
  attr_accessor :type, :name, :iq, :annoyance_factor

  def initialize(name="unnamed", type="spider", iq=8, annoyance_factor=4)
    @type = type
    @name = name
    @iq = iq
    @annoyance_factor = annoyance_factor
  end

  #works with keep_type or keep_types, things like keep_butterflies does not work
  def Bug.method_missing(name, args)
    name = name.to_s
    if (name =~ /^keep_([a-z]+?)s?$/i)
      bugs = args.select{ |bug| bug.type == $1 }
    end
  end
end

bugs = [
  Bug.new("ron","spider","4","2"),
  Bug.new("don","spider","2","3"),
  Bug.new("jake","ant","9","4"),
  Bug.new("chris","ladybug","2","4"),
  Bug.new("fred","cockchaffer","0","5"),
  Bug.new("greg","butterfly","2","0"),
  Bug.new("jason","butterfly","0","2")
]

butterflies = Bug.keep_butterfly(bugs)

butterflies.each do |b|
  puts "I am #{b.name}, a beautiful #{b.type}.  I have an IQ of #{b.iq} and an annoyance factor of #{b.annoyance_factor}"
end

FrankLamontagne

October 23, 2007, October 23, 2007 14:28, permalink

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class Bug
  attr_accessor :name,:type,:iq,:annoyance_factor
  def initialize(name="unname",type=:spider,iq=8,annoyance_factor=4)
	@name=name
	@type=type
	@iq=iq
	@annoyance_factor=annoyance_factor
  end  
end

class Bugs < Array
  def keep(type)
    self.reject! { |b| b.type != type }
  end
  
  def talk!
    self.each do |bug|
      puts "I am a #{bug.type.to_s} and my name is #{bug.name}. I have an IQ of #{bug.iq} and an annoyance factor of #{bug.annoyance_factor}"
    end
  end
end

bugs = Bugs.new([
  Bug.new("ron",:spider,4,2),
  Bug.new("don",:spider,2,3),
  Bug.new("jake",:ant,9,4),
  Bug.new("chris",:ladybug,2,4),
  Bug.new("fred",:cockchaffer,0,5),
  Bug.new("greg",:butterfly,2,0),
  Bug.new("jason",:butterfly,0,2)
])

bugs.keep(:butterfly)
bugs.talk!

Mike Woodhouse

October 23, 2007, October 23, 2007 15:07, permalink

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I'm wondering if I may have strayed away from refactoring and into code golf here...

class Bug
  attr_accessor(:bug_type, :name, :iq, :annoyance_factor)
  def initialize(name = "unnamed", bug_type = "spider", iq = 8, annoyance_factor = 4)
    @annoyance_factor, @bug_type, @name, @iq = annoyance_factor, bug_type, name, iq
  end
  def describe
    puts "I am a #{@bug_type} and my name is #{@name}. I have an IQ of #{@iq} and an annoyance factor of #{@annoyance_factor}"
  end
end

class Bugs < Array
  def describe_all(filter_type)
    each do |bug| 
      bug.describe if bug.bug_type == filter_type
    end
  end
end

BUGDEFS = [["ron","spider","4","2"],["don","spider","2","3"],
          ["jake","ant","9","4"],["chris","ladybug","2","4"],
          ["fred","cockchaffer","0","5"],["greg","butterfly","2","0"],
          ["jason","butterfly","0","2"]]
bugs = Bugs.new
BUGDEFS.each { |bug_def| bugs << Bug.new(*bug_def) }

bugs.describe_all "butterfly"

Panya

October 23, 2007, October 23, 2007 16:29, permalink

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class Bug
  attr_accessor :type, :name, :iq, :annoyance_factor
	
  def initialize(name='unnamed',type='spider',iq=8,annoyance_factor=4)
    @name, @type, @iq, @annoyance_factor = name, type, iq, annoyance_factor
  end

  def to_s
   "I am a #@type and my name is #@name. I have an IQ of #@iq and an annoyance factor of #@annoyance_factor" 	
  end
end

class Bugs < Array
  def keep(type)
    self.select{|bug| bug.type == type}
  end
end

#create some bugs!
bugs = Bugs.new([
  Bug.new("ron","spider","4","2"),
  Bug.new("don","spider","2","3"),
  Bug.new("jake","ant","9","4"),
  Bug.new("chris","ladybug","2","4"),
  Bug.new("fred","cockchaffer","0","5"),
  Bug.new("greg","butterfly","2","0"),
  Bug.new("jason","butterfly","0","2")
])
bugs.keep("butterfly").each{|butterfly| puts butterfly}

Mark Van Holstyn

October 23, 2007, October 23, 2007 17:09, permalink

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require 'rubygems'
require 'active_support'

class Bug < Struct.new(:name, :type, :iq, :annoyance_factor)
  def to_s
    "I am a #{type} and my name is #{name}. I have an IQ of #{iq} and an annoyance factor of #{annoyance_factor}"
  end
end

class Bugs < Array
  def method_missing(method_name, *args, &block)
    Bugs.new(select { |bug| bug.type.to_s == method_name.to_s.singularize })
  end
end

bugs = Bugs.new [
  Bug.new("ron",    :spider,       4,  2),
  Bug.new("don",    :spider,       2,  3),
  Bug.new("jake",   :ant,          9,  4),
  Bug.new("chris",  :ladybug,      2,  4),
  Bug.new("fred",   :cockchaffer,  0,  5),
  Bug.new("greg",   :butterfly,    2,  0),
  Bug.new("jason",  :butterfly,    0,  2)
]

puts *bugs.spiders

Mike Abney

October 23, 2007, October 23, 2007 23:22, permalink

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Nothing too special here, just felt like posting something. I like others' use of "method_missing", but it just seemed a bit more work than was necessary.

class Bug
	attr_accessor :type, :name, :iq, :annoyance_factor
	
	def initialize(name="unnamed", type="spider", iq=8, annoyance_factor=4)
			@type=type
			@name=name
			@iq = iq
			@annoyance_factor = annoyance_factor
	end
	
	def introduction
  	"I am a #{@type} and my name is #{@name}. I have an IQ of #{@iq} and an annoyance factor of #{@annoyance_factor}."
  end
end

class Bugs < Array
  def keep(type)
    Bugs.new(select { |bug| bug.type == type })
  end
  
  def keep!(type)
    select! { |bug| bug.type == type }
  end
  
  def introductions
    collect { |bug| bug.introduction}
  end
end

#create some bugs!
bugs = Bugs.new [
  Bug.new("ron","spider","4","2"),
  Bug.new("don","spider","2","3"),
  Bug.new("jake","ant","9","4"),
  Bug.new("chris","ladybug","2","4"),
  Bug.new("fred","cockchaffer","0","5"),
  Bug.new("greg","butterfly","2","0"),
  Bug.new("jason","butterfly","0","2")
]

puts bugs.keep("butterfly").introductions

Shalev

October 24, 2007, October 24, 2007 00:26, permalink

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Shortest complete solution. The struct solutions are good, but they don't allow for default values.

class Bug
  attr_accessor :name, :type, :iq, :annoyance_factor

  def initialize(name='unnamed', type='spider', iq=8, annoyance_factor=4)
    @name, @type, @iq, @annoyance_factor = name, type, iq, annoyance_factor
  end

  def to_s
    "I am a #{type} and my name is #{name}. I have an IQ of #{iq} and an annoyance factor of #{annoyance_factor}"
  end
end

puts [ ["ron","spider","4","2"],["don","spider","2","3"],
          ["jake","ant","9","4"],["chris","ladybug","2","4"],
          ["fred","cockchaffer","0","5"],["greg","butterfly","2","0"],
          ["jason","butterfly","0","2"] ].map {|args| Bug.new(*args)}.select {|bug| bug.type == 'spider'}

michiel

October 24, 2007, October 24, 2007 11:15, permalink

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Building on Mark Van Holstyn's solution, keeping the 'keep_spiders' syntax and cleaner syntax for entering bugs.

require 'rubygems'
require 'active_support'

MSG = "I am a %s and my name is %s. I have an IQ of %s and an annoyance factor of %s"

class Bug < Struct.new(:type, :desc)
  alias to_s desc
end

class Bugs < Array
  def method_missing(name, *_)
    return super unless name.to_s =~ /^keep_/
    Bugs.new(select { |bug| bug.type.to_s == name.to_s[5..-1].singularize })
  end
end

def make_bugs(bugs = Bugs.new)
  yield lambda {|*a| bugs << Bug.new(a[1], sprintf(MSG, *a)) }
end

bugs = make_bugs do |bug|
  bug["ron",    :spider,       4,  2]
  bug["don",    :spider,       2,  3]
  bug["jake",   :ant,          9,  4]
  bug["chris",  :ladybug,      2,  4]
  bug["fred",   :cockchaffer,  0,  5]
  bug["greg",   :butterfly,    2,  0]
  bug["jason",  :butterfly,    0,  2]
end

puts bugs.keep_butterflies

Calvin Yu

October 26, 2007, October 26, 2007 00:17, permalink

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class Bug
  attr_accessor :type, :name, :iq, :annoyance_factor	
	
  def initialize(name='unnamed',type='spider',iq=8,annoyance_factor=4)
    @name, @type, @iq, @annoyance_factor = name, type, iq, annoyance_factor
  end	

  def to_s
    "I am a #{type} and my name is #{name}. I have an IQ of #{iq} and an annoyance factor of #{annoyance_factor}"
  end

  def method_missing(method_name, *args, &block)
     method_name.to_s[-1] == ?? ? (@type == method_name.to_s[0..-2]) : super
  end
end

#create some bugs!
puts [
  %w( ron   spider      4 2 ),
  %w( don   spider      2 3 ),
  %w( jake  ant         9 4 ),
  %w( chris ladybug     2 4 ),
  %w( fred  cockchaffer 0 5 ),
  %w( greg  butterfly   2 0 ),
  %w( jason butterfly   0 2 )].map {|args| Bug.new(*args)}.select {|bug| bug.butterfly?}

Chris T

October 26, 2007, October 26, 2007 17:40, permalink

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Similar to above but the method missing on the Bug class

class Bug
  attr_accessor :type, :name, :iq, :annoyance_factor	
  
  def initialize(name = "unnamed",type = "spider",
      iq = 8, annoyance_factor = 4)
    @type= type 
    @name=name
    @iq = iq
    @annoyance_factor = annoyance_factor 
  end
  
  def method_missing(method_name, *args)
    #check for <type>?
    if method_name.to_string =~/\?\z/ 
      $` == @type
    else
      super.method_missing(method_name, *args)
    end
  end
end


#create some bugs!
bugs = [
  Bug.new("ron","spider","4","2"),
  Bug.new("don","spider","2","3"),
  Bug.new("jake","ant","9","4"),
  Bug.new("chris","ladybug","2","4"),
  Bug.new("fred","cockchaffer","0","5"),
  Bug.new("greg","butterfly","2","0"),
  Bug.new("jason","butterfly","0","2"), 
  ]

bugs.each do |bug|
  if bug.butterfly? then 
    puts "I am a butterfly and my name is #{bug.name}. I have an IQ of #{bug.iq} and an annoyance factor of #{bug.annoyance_factor}"
  end
end

Justin Jones

October 29, 2007, October 29, 2007 07:08, permalink

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Some pretty crazy method_missing stuff... too "clever", imo.

require 'rubygems'
require 'active_support'

class Bug
  attr_accessor :name, :type, :iq, :annoyance_factor

  def initialize(type=:spider, name='unnamed', iq=8, annoyance_factor=4)
    @name, @type, @iq, @annoyance_factor = name, type, iq, annoyance_factor
  end

  def to_s
    "I am a #{type} and my name is #{name}. I have an IQ of #{iq} and an annoyance factor of #{annoyance_factor}"
  end
end

class Bugs < Array
  class << self
    def swarm(bugs = Bugs.new, &block)
      yield(bugs)
    end

    def method_missing(method_name, *args, &block)
      return super unless method_name.to_s =~ /_swarm$/
      swarm(*args, &block).send("keep_#{method_name.to_s[0..-7]}")
    end
  end

  def method_missing(method_name, *args)
    if method_name.to_s =~ /^keep_/
      select { |bug| bug.type.to_s == method_name.to_s[5..-1].singularize }
    else
      self << Bug.new(method_name, *args)
    end
  end
end

all_bugs = Bugs.swarm do |bug|
  bug.spider('Ron', 4, 2)
  bug.spider('Don', 2, 3)
  bug.ant('Jake', 9, 4)
  bug.ladybug('Chris', 2, 4)
  bug.cockchaffer('Fred', 0, 5)
  bug.butterfly('Greg', 2, 0)
  bug.butterfly('Jason', 0, 2)
end

puts "Spiders"
puts all_bugs.keep_spiders

butterflies = Bugs.butterfly_swarm do |bug|
  bug.spider('Ron', 4, 2)
  bug.spider('Don', 2, 3)
  bug.ant('Jake', 9, 4)
  bug.ladybug('Chris', 2, 4)
  bug.cockchaffer('Fred', 0, 5)
  bug.butterfly('Greg', 2, 0)
  bug.butterfly('Jason', 0, 2)
end

puts "\nButterflies"
puts butterflies

ants = Bugs.ant_swarm(all_bugs) do |bug|
  bug.ant('Ants', 10, 3)
  bug.splat('Dead Bug', 0, 0)
end

puts "\nAnts"
puts ants

fifoo

January 4, 2008, January 04, 2008 21:44, permalink

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Nothing too clever I'm afraid.

class Bug

  attr_reader :name, :type, :iq, :annoyance_factor

  def initialize(name = "unnamed", type = :spider, iq = 8, annoyance_factor = 4)
    @name, @type, @iq, @annoyance_factor = name, type, iq, annoyance_factor
  end

  def to_s
    "I am a #{type} and my name is #{name}. I have an IQ of #{iq} and an annoyance factor of #{annoyance_factor}\n"
  end

end

class BugCollection < Array

  def add(*args)
    self << Bug.new(*args)
  end

  def keep(type)
    select { |b| b.type == type }
  end

  def keep!(type)
    delete_if { |b| b.type != type }
  end

end

#create some bugs!
bugs = BugCollection.new

[ ["ron",   :spider,      4, 2],
  ["don",   :spider,      2, 3],
  ["jake",  :ant,         9, 4],
  ["chris", :ladybug,     2, 4],
  ["fred",  :cockchaffer, 0, 5],
  ["greg",  :butterfly,   2, 0],
  ["jason", :butterfly,   0, 2] ].each { |bug_details| bugs.add(*bug_details) }


puts bugs

puts "-- spiders:"
puts bugs.keep(:spider)

puts "-- butterflies:"
bugs.keep!(:butterfly)
puts bugs

Sean Cribbs

January 26, 2008, January 26, 2008 18:01, permalink

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I was surprised the other solutions don't have the class itself keeping track of instances.

class Bug
  attr_accessor :type, :name, :iq, :annoyance_factor 
  @@bugs = []

  def initialize(name='unnamed',type='spider',iq=8,annoyance_factor=4)
    @type, @name, @iq, @annoyance_factor = type, name, iq, annoyance_factor
    @@bugs << self
  end

  def self.[](type)
    @@bugs.select { |bug| bug.type == type }
  end
  
  def inspect
    "I am a #{type} and my name is #{name}. I have an IQ of #{iq} and an annoyance factor of #{annoyance_factor}"
  end

  alias :to_s :inspect
end

#create some bugs!
Bug.new("ron",    "spider",       4, 2)
Bug.new("don",    "spider",       2, 3)
Bug.new("jake",   "ant",          9, 4)
Bug.new("chris",  "ladybug",      2, 4)
Bug.new("fred",   "cockchaffer",  0, 5)
Bug.new("greg",   "butterfly",    2, 0)
Bug.new("jason",  "butterfly",    0, 2)

Bug["butterfly"].each do |butterfly|
  puts butterfly
end

Refactor :my => 'code'

Recent

Popular

Ruby Rubyize this : 4th edition

Refactorings

Julio

October 23, 2007, October 23, 2007 13:30, permalink

macournoyer

October 23, 2007, October 23, 2007 13:50, permalink

jswanner

October 23, 2007, October 23, 2007 14:27, permalink

FrankLamontagne

October 23, 2007, October 23, 2007 14:28, permalink

Mike Woodhouse

October 23, 2007, October 23, 2007 15:07, permalink

Panya

October 23, 2007, October 23, 2007 16:29, permalink

Mark Van Holstyn

October 23, 2007, October 23, 2007 17:09, permalink

Mike Abney

October 23, 2007, October 23, 2007 23:22, permalink

Shalev

October 24, 2007, October 24, 2007 00:26, permalink

michiel

October 24, 2007, October 24, 2007 11:15, permalink

Calvin Yu

October 26, 2007, October 26, 2007 00:17, permalink

Chris T

October 26, 2007, October 26, 2007 17:40, permalink

Justin Jones

October 29, 2007, October 29, 2007 07:08, permalink

fifoo

January 4, 2008, January 04, 2008 21:44, permalink

Sean Cribbs

January 26, 2008, January 26, 2008 18:01, permalink

Your refactoring

Recent

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Ruby Rubyize this : 4th edition

Refactorings

October 23, 2007, October 23, 2007 13:30 //<![CDATA[ $('time_ago_1193171406').update(DateHelper.timeAgoInWords(1193171406000) + ' ago') //]]> , permalink

October 23, 2007, October 23, 2007 13:50 //<![CDATA[ $('time_ago_1193172647').update(DateHelper.timeAgoInWords(1193172647000) + ' ago') //]]> , permalink

October 23, 2007, October 23, 2007 14:27 //<![CDATA[ $('time_ago_1193174835').update(DateHelper.timeAgoInWords(1193174835000) + ' ago') //]]> , permalink

October 23, 2007, October 23, 2007 14:28 //<![CDATA[ $('time_ago_1193174895').update(DateHelper.timeAgoInWords(1193174895000) + ' ago') //]]> , permalink

Mike Woodhouse

October 23, 2007, October 23, 2007 15:07 //<![CDATA[ $('time_ago_1193177265').update(DateHelper.timeAgoInWords(1193177265000) + ' ago') //]]> , permalink

Panya

October 23, 2007, October 23, 2007 16:29 //<![CDATA[ $('time_ago_1193182171').update(DateHelper.timeAgoInWords(1193182171000) + ' ago') //]]> , permalink

October 23, 2007, October 23, 2007 17:09 //<![CDATA[ $('time_ago_1193184557').update(DateHelper.timeAgoInWords(1193184557000) + ' ago') //]]> , permalink

Mike Abney

October 23, 2007, October 23, 2007 23:22 //<![CDATA[ $('time_ago_1193206921').update(DateHelper.timeAgoInWords(1193206921000) + ' ago') //]]> , permalink

Shalev

October 24, 2007, October 24, 2007 00:26 //<![CDATA[ $('time_ago_1193210819').update(DateHelper.timeAgoInWords(1193210819000) + ' ago') //]]> , permalink

October 24, 2007, October 24, 2007 11:15 //<![CDATA[ $('time_ago_1193249732').update(DateHelper.timeAgoInWords(1193249732000) + ' ago') //]]> , permalink

October 26, 2007, October 26, 2007 00:17 //<![CDATA[ $('time_ago_1193383053').update(DateHelper.timeAgoInWords(1193383053000) + ' ago') //]]> , permalink

Chris T

October 26, 2007, October 26, 2007 17:40 //<![CDATA[ $('time_ago_1193445627').update(DateHelper.timeAgoInWords(1193445627000) + ' ago') //]]> , permalink

Justin Jones

October 29, 2007, October 29, 2007 07:08 //<![CDATA[ $('time_ago_1193666887').update(DateHelper.timeAgoInWords(1193666887000) + ' ago') //]]> , permalink

fifoo

January 4, 2008, January 04, 2008 21:44 //<![CDATA[ $('time_ago_1199511868').update(DateHelper.timeAgoInWords(1199511868000) + ' ago') //]]> , permalink

January 26, 2008, January 26, 2008 18:01 //<![CDATA[ $('time_ago_1201399261').update(DateHelper.timeAgoInWords(1201399261000) + ' ago') //]]> , permalink

Your refactoring

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January 4, 2008, January 04, 2008 21:44, permalink

January 26, 2008, January 26, 2008 18:01, permalink