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    <p>I found a solution!</p> <p>After poking around and further checking the "track by" with my scenarios, I can see that it actually does more what it says:</p> <p>1) If you have a collection of objects, with each object having: id, name, description, you can, using 'track by' choose a property that it connects to, so, on retrieving a new collection of objects from a webservice, it will not render the DOM object belonging to the value.</p> <p>2) Most importantly, and what I was after: If an object with an existing id arrives from the server with fx a changed name, will it be reflected in the array collection on the object with that id? Yes, it will! So, "track by" will actually check the properties of the incoming object and replace the old object and still leave the id alone. That's intense.</p> <p>It's also worth noting that "track by" works also with other directives than <strong>ng-repeat</strong>, such as <strong>select</strong>.</p> <p>I made a small demo, for other people who might be confused about how everything works... but it seems to be cool!</p> <pre><code> &lt;div ng-repeat='country in countryArray track by country.id'&gt; {{country.id}} {{country.name}} &lt;input type="checkbox"&gt;&lt;/input&gt; &lt;/div&gt; &lt;div&gt; &lt;select ng-model='nonExisting' ng-options='country.name for country in countryArray track by country.id'&gt;&lt;/select&gt; &lt;/div&gt; &lt;/div&gt; </code></pre> <p><a href="http://jsfiddle.net/KUf8C/">http://jsfiddle.net/KUf8C/</a></p>
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    1. POHow to avoid refreshing ng-repeat DOM list when array is updated
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    1. USPeter Goodheart
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    1. COI see. I was trying to solve a slightly different problem. Here is a fiddle illustrating the problem I was working on http://jsfiddle.net/KUf8C/1/. My solution might be better for something like tracking if an email has been read or not but for most other things including selecting items the track by solution seems better and is clearly much simpler.
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    2. CODon't sweat it, I really appreciated your code. I'm no expert. It gave me some new ideas, and it was also quite humorous. A good way to learn.
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      1. USPeter Goodheart
 

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