Revision 705901 of Iterator

<div class="warning">
  The <code><strong>Iterator</strong></code> constructor is a SpiderMonkey-specific feature, and will be removed at some point. For future-facing usages, consider using <a href="/en-US/docs/Web/JavaScript/Reference/Statements/for...of" title="/en-US/docs/Web/JavaScript/Reference/Statements/for...of">for..of</a> loops and the <a href="/en-US/docs/Web/JavaScript/Guide/The_Iterator_protocol">iterator protocol</a></div>
<h2 id="Summary">Summary</h2>
<p>The <code><strong>Iterator</strong></code> function returns legacy generator which iteratates over enumerable propeties of an Object.</p>
<h2 id="Syntax" name="Syntax">Syntax</h2>
<pre class="syntaxbox">
Iterator(<var>object</var>)</pre>
<h3 id="Parameters" name="Parameters">Parameters</h3>
<dl>
 <dt>
  <code>object</code></dt>
 <dd>
  Object to iterator over propeties.</dd>
</dl>
<h2 id="Description">Description</h2>
<p>An overview of the usage is available on the <a href="/en-US/docs/JavaScript/Guide/Iterators_and_Generators" title="/en-US/docs/JavaScript/Guide/Iterators_and_Generators">Iterators and Generators</a> page.</p>
<h2 id="Properties">Properties</h2>
<h2 id="Methods">Methods</h2>
<dl>
 <dt>
   <code><strong>Iterator.prototype.next</strong></code></dt>
 <dd>
   Returns next item in <code>[property_name, property_value]</code> format. it throws <a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/StopIteration">StopIteration</a> if there is no more items.
 </dd>
</dl>
<h2 id="Examples">Examples</h2>
<p>Iterate over properties of an object.</p>
<pre>
var a = {
  x: 10,
  y: 20,
};
var iter = Iterator(a);
console.log(iter.next()); // ["x", 10]
console.log(iter.next()); // ["y", 20]
console.log(iter.next()); // throws StopIteration
</pre>
<p>Iterate over properties of an object with legacy destructuring <code>for-in</code> statement.</p>
<pre>
var a = {
  x: 10,
  y: 20,
};
for (var [name, value] in Iterator(a)) {
  console.log(name, value);   // x 10
                              // y 20
}
</pre>
<h2 id="See_also">See also</h2>
<ul>
  <li><a href="/en-US/docs/JavaScript/Guide/Iterators_and_Generators" title="/en-US/docs/JavaScript/Guide/Iterators_and_Generators">Iterators and Generators</a></li>
  <li><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/StopIteration">StopIteration</a></li>
</ul>