title: JQuery: Object value
body: <p>Let <code>a = {a: 1, b:2}</code>, whichs shows in console <code>Object {a: 1, b: 2}</code>.</p>
  
  <p>When I do <code>a.a</code> I get 1.
  When I do <code>a[a]</code> I get undefined.</p>
  
  <p>Is it normal ?</p>
  
  <p>I'm asking this because I need to get values from dynamic keys. <code>a[product1], a[product2]....</code></p>