title: Why use symbols as hash keys in Ruby?
body: <p>A lot of times people use symbols as keys in a Ruby hash.</p>
  
  <p>What's the advantage over using a string?</p>
  
  <p>E.g.:</p>
  
  <pre><code>hash[:name]
  </code></pre>
  
  <p>vs.</p>
  
  <pre><code>hash['name']
  </code></pre>