d you can safely use a two-way binding (which are de facto one-way bindings if you only ever change one side).
Sometimes one-way bindings are useful to achieve specific behaviour such as a
default that is the same as another property but can be overridden (e.g. a
shipping address that starts the same as a billing address but can later be
changed)</p>
<pre class="language-javascript line-numbers"><code class="javascript language-javascript">user <span class="token operator">=</span> Ember<span class="token p