title: When should I use parentheses in knockout
body: <p>I am a beginner in Knockout and I must say I often get confused regarding when to use <code>()</code>. Is there any general tip/trick regarding when would you use <code>()</code> against when you would not because at the moment I am just doing trial and error. If the binding throws error or doesn't update values I remove <code>()</code> else I put.</p>