Javascript equivalent of Python's iterkeys() dictionary method
<p>In Python I can use the <code>iterkeys()</code> method to iterate over the keys of a dictionary. For example:</p>

<pre><code>mydict = {'a': [3,5,6,43,3,6,3,],
          'b': [87,65,3,45,7,8],
          'c': [34,57,8,9,9,2],}
for k in mydict.iterkeys():
    print k
</code></pre>

<p>gives me:</p>

<pre><code>a
c
b
</code></pre>

<p>How can I do something similar in Javascript?</p>
