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Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /Users/michaelverdi/.rvm/rubies/ree-1.8.7-2011.12/bin/ruby extconf.rb 
checking for libxml/parser.h... yes
checking for libxslt/xslt.h... yes
checking for libexslt/exslt.h... yes
checking for iconv_open() in iconv.h... no
checking for iconv_open() in -liconv... yes
checking for xmlParseDoc() in -lxml2... yes
checking for xsltParseStylesheetDoc() in -lxslt... yes

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module CheckedAttributes 
  def self.included(base)
    base.extend ClassMethods
  end

  module ClassMethods
    def attr_checked(attribute, &validation)
      define_method "#{attribute}=" do |value|
        raise 'Invalid attribute' unless validation.call(value)
        instance_variable_set("@#{attribute}", value)

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class GuessingGame
  def initialize(answer)
    @answer = answer
    @solved = false
  end

  def guess(number)
    return "Answer is already known" if @solved
    if number > @answer
      :high

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#InvoiceItem Class

def self.filter_by_item(item_id)
  InvoiceItem.all_successful.select { |ii| ii.item_id == item_id }
end

def self.revenue_per_item(item_id)
  filter_by_item(item_id).collect { |ii| ii.unit_price * ii.quantity }.inject(:+)
end

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class Encryptor
  def cipher(rotation)
    characters = (' '..'z').to_a
    rotated_characters = characters.rotate(rotation)
    Hash[characters.zip(rotated_characters)]
  end

  def encrypt_letter(letter,rotation)
    lowercase_letter = letter.downcase
    cipher_for_rotation = cipher(rotation)

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function newspaper(name, left, top, width, height) {
  this.name   = name;
  this.left   = left;
  this.top    = top;
  this.width  = width;
  this.height = height;
}

var nyTimes = new newspaper('nytimes', 200, 440, 1400, 800);
var laTimes = new newspaper('latimes', 500, 200, 1000, 900);

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function newspaper(name, left, top, width, height) {
  this.name   = name;
  this.left   = left;
  this.top    = top;
  this.width  = width;
  this.height = height;
}

var nyTimes = new newspaper('nytimes', 200, 440, 1400, 800);
var laTimes = new newspaper('latimes', 500, 200, 1000, 900);

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fizzbuzz = Proc.new do |n|
    if n % 15 == 0
      puts "fizzbuzz"
    elsif n % 3  == 0    
      puts "fizz"
    elsif n % 5  == 0
      puts "buzz"
    else
      puts n
    end

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1
mission statement
why program
intros - kids
why pomo

2
instructor intro
pbj

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Main ingredients
6 tomatoes (roma, beefsteak, w/e)
3 carrots
2 bulbs of garlic
1 bag frozen corn
1 medium onion

random stuff
olive oil
veggie broth