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    <p>Here is a partial, naïve solution to my problem - I will update this as I further develop it.</p> <pre><code>function findDifferences(objectA, objectB) { var propertyChanges = []; var objectGraphPath = ["this"]; (function(a, b) { if(a.constructor == Array) { // BIG assumptions here: That both arrays are same length, that // the members of those arrays are _essentially_ the same, and // that those array members are in the same order... for(var i = 0; i &lt; a.length; i++) { objectGraphPath.push("[" + i.toString() + "]"); arguments.callee(a[i], b[i]); objectGraphPath.pop(); } } else if(a.constructor == Object || (a.constructor != Number &amp;&amp; a.constructor != String &amp;&amp; a.constructor != Date &amp;&amp; a.constructor != RegExp &amp;&amp; a.constructor != Function &amp;&amp; a.constructor != Boolean)) { // we can safely assume that the objects have the // same property lists, else why compare them? for(var property in a) { objectGraphPath.push(("." + property)); if(a[property].constructor != Function) { arguments.callee(a[property], b[property]); } objectGraphPath.pop(); } } else if(a.constructor != Function) { // filter out functions if(a != b) { propertyChanges.push({ "Property": objectGraphPath.join(""), "ObjectA": a, "ObjectB": b }); } } })(objectA, objectB); return propertyChanges; } </code></pre> <p>And here is a sample of how it would be used and the data it would provide (please excuse the long example, but I want to use something relatively non-trivial):</p> <pre><code>var person1 = { FirstName : "John", LastName : "Doh", Age : 30, EMailAddresses : [ "john.doe@gmail.com", "jd@initials.com" ], Children : [ { FirstName : "Sara", LastName : "Doe", Age : 2 }, { FirstName : "Beth", LastName : "Doe", Age : 5 } ] }; var person2 = { FirstName : "John", LastName : "Doe", Age : 33, EMailAddresses : [ "john.doe@gmail.com", "jdoe@hotmail.com" ], Children : [ { FirstName : "Sara", LastName : "Doe", Age : 3 }, { FirstName : "Bethany", LastName : "Doe", Age : 5 } ] }; var differences = findDifferences(person1, person2); </code></pre> <p>At this point, here is what the <code>differences</code> array would look like if you serialized it to JSON:</p> <pre><code>[ { "Property":"this.LastName", "ObjectA":"Doh", "ObjectB":"Doe" }, { "Property":"this.Age", "ObjectA":30, "ObjectB":33 }, { "Property":"this.EMailAddresses[1]", "ObjectA":"jd@initials.com", "ObjectB":"jdoe@hotmail.com" }, { "Property":"this.Children[0].Age", "ObjectA":2, "ObjectB":3 }, { "Property":"this.Children[1].FirstName", "ObjectA":"Beth", "ObjectB":"Bethany" } ] </code></pre> <p>The <code>this</code> in the <code>Property</code> value refers to the root of the object that was compared. So, this solution is not yet <em>exactly</em> what I need, but it is pretty darn close. </p> <p>Hope this is useful to someone out there, and if you have any suggestions for improvement, I am all-ears; I wrote this very late last night (i.e. early this morning) and there may be things I am completely overlooking.</p> <p>Thanks.</p>
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    1. POHow can I get a list of the differences between two JavaScript object graphs?
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