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# ask the user what position
puts "What position of a Fibonacci sequence would you like to see the value of? (Ex: position 6 = 8)"

# method for returning the value of a position in a Fibonacci sequence
def fibo_it(num)
    num <= 1 ? num : fibo_it(num - 2) + fibo_it(num - 1)
end

# get the user input and convert to integer
pos = gets.chomp.to_i

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class Email < ActiveRecord::Base
  validates_presence_of :first_name, :last_name, :email_address
  validates_format_of :first_name, :last_name, :with => /^[A-Za-z0-9.&]*\z/
  validates_format_of :email_address, :with => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i
  validates_uniqueness_of :email_address
end

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<%= "<li" + (if url_category == category then " class='down-arrow'>" else ">" end) %>

 <%= link_to PROD_CAT_DISPLAY[category], categories_path(:product_cat => category.downcase) %></li>

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### PRODUCTS VIEW ###

 <%= button_to 'Customize', new_studio_path, method: :get, :class => 'button [tiny small large] middle pos-10-top' %>

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## PRODUCTS VIEW ##

<%= button_to 'Customize', new_studio_path, :class => 'button [tiny small large] middle pos-10-top' %>

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<h3>Product Categories</h3>

<div class="large-4 columns">
  <%= render 'form' %>
</div>
<div class="large-8 columns">
<table>
  <thead>
    <tr>
      <th width="300">Name</th>

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# views/admin/product_categories/_form.html.erb

<%= simple_form_for(@product_category) do |f| %>
  <%= f.error_notification %>

  <div class="form-inputs">
    <%= f.input :name %>
  </div>

  <div class="form-actions">

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#/views/products/index.html.erb

<div class="hide-for-small panel">
  <h3>Sidebar</h3>
  <h5 class="subheader">Feature Product</h5>
    <% Product.random do |product|%>
      <%= image_tag(Product.image_url) %> 
      <h5><%= link_to Product.title, product %></h5>
      <p><%= button_to 'Add to Cart', line_items_path(:product_id => product) %></p>
    <% end %>