title: What is a mnemonic for remembering how to call ruby inject?
body: <p>I can never remember if its </p>
  
  <pre><code>array.inject{|memo,obj| block}
  </code></pre>
  
  <p>or</p>
  
  <pre><code>array.inject{|obj,memo| block}
  </code></pre>
  
  <p>Does anyone have a good trick for remembering the order?</p>