It is not possible to create cyclic structures with borrowed pointers. There is not any good way of achieving cyclic data structures at present; the only real solutions are: Use reference counting with Rc<T> with a cyclic structure with Rc::new() and Rc:downgrade(). Read the rc module documentation and be careful to not create cyclic structures … Read more
Pardon me if this is too obvious. At the time of writing, I dont know what you have tried. insert console.log(the object); replacing ‘the object’ with the object you are passing to JSON.stringify() insert this line before the JSON.stringify call and look in the console log (shift control J) for the object. In the console … Read more
Update: Do not try to use NonSerializedAttribute, as the JavaScriptSerializer apparently ignores it. Instead, use the ScriptIgnoreAttribute in System.Web.Script.Serialization. public class Machine { public string Customer { get; set; } // Other members // … } public class Customer { [ScriptIgnore] public Machine Machine { get; set; } // Parent reference? // Other members // … Read more
Doctrine have the same service class. Example of usage: <?php echo “<pre>”; \Doctrine\Common\Util\Debug::dump($result, 4); echo “</pre>”;?>
Any half-decent garbage collector will handle cycles. Cycles are only a problem if you do naive reference counting. Most garbage collectors don’t do ref-counting (both because it can’t handle cycles, and because it’s inefficient). Instead, they simply follow every reference they can find, starting from “roots” (typically globals and stack-based variables), and mark everything they … Read more
http://jsonml.org/ takes a shot at a grammar for converting XHTML DOM elements into JSON. An an example: <ul> <li style=”color:red”>First Item</li> <li title=”Some hover text.” style=”color:green”>Second Item</li> <li><span class=”code-example-third”>Third</span> Item</li> </ul> becomes [“ul”, [“li”, {“style”: “color:red”}, “First Item”], [“li”, {“title”: “Some hover text.”, “style”: “color:green”}, “Second Item”], [“li”, [“span”, {“class”: “code-example-third”}, “Third”], ” Item” ] … Read more
Yep, weakref’s excellent here. Specifically, instead of: self.children = {} use: self.children = weakref.WeakValueDictionary() Nothing else needs change in your code. This way, when a child has no other differences, it just goes away — and so does the entry in the parent’s children map that has that child as the value. Avoiding reference loops … Read more
The creator of TypeScript explains how to create recursive types here. The workaround for the circular reference is to use extends Array. In your case this would lead to this solution: type Document = number | string | DocumentArray; interface DocumentArray extends Array<Document> { } Update (TypeScript 3.7) Starting with TypeScript 3.7, recursive type aliases … Read more
The .NET garbage collector can absolutely handle circular references. The very high level view of how the garbage collector works is … Start with locals, statics and GC pinned objects. None of these can be collected Mark every object which can be reached by traversing the children of these objects Collect every object which is … Read more
I can only tell how the Mono Project does this. The theorem is quite simple, though it gives a code mess. They first compile System.Configuration.dll, without the part needing the reference to System.Xml.dll. After this, they compile System.Xml.dll the normal way. Now comes the magic. They recompile System.configuration.dll, with the part needing the reference to … Read more