title: Usage of "ARGV.first"
body: <p>I was trying the following code:</p>
  
  <pre><code>user = ARGV.first # supposed to ask for user name
  puts "Hi, #{user}. How do you like this?"
  </code></pre>
  
  <p>It does not print as expected. It only prints:</p>
  
  <pre><code>Hi, . Do you like me?
  </code></pre>
  
  <p>Can someone give me a hint on this?</p>