Static typing vs dynamic typing: Static typing is when your type checking occurs at compile time. You must define a type for your variables inside of your code and any operations you perform on your data would be checked by the compiler. Dynamic typing is when your type checking occurs at runtime. Instead of errors … Read more
This link should help: https://learn.microsoft.com/en-us/dotnet/api/system.activator.createinstance Activator.CreateInstance will create an instance of the specified type. You could wrap that in a generic method like this: public T GetInstance<T>(string type) { return (T)Activator.CreateInstance(Type.GetType(type)); }
Not very easily, no. Reflection doesn’t work, since it assumes a regular type model, which is not the full range of dynamic. If you are actually just talking to regular objects, then just use reflection here. Otherwise, I expect you may want to reverse-engineer the code that the compiler emits for a basic assignment, and … Read more
The constructor chain has to be determined for certain at compile-time – the compiler has to pick an overload so that it can create valid IL. Whereas normally overload resolution (e.g. for method calls) can be deferred until execution time, that doesn’t work for chained constructor calls. EDIT: In “normal” C# code (before C# 4, … Read more
var is just a syntactic sugar to let the type to be decided by the RHS. In your code: var a = (object)2; is equivalent to: object a = (object)2; You get an object, since you boxed 2 to an object. For dynamic, you might want to have a look at Using Type dynamic. Note … Read more
var head = document.getElementsByTagName(‘head’)[0]; var script = document.createElement(‘script’); script.type=”text/javascript”; script.onload = function() { callFunctionFromScript(); } script.src=”https://stackoverflow.com/questions/5132488/path/to/your-script.js”; head.appendChild(script);
They’re hugely different. If you use dynamic you’re opting into dynamic typing, and thus opting out of compile-time checking for the most part. And yes, it’s less performant than using static typing where you can use static typing. However, you can’t do much with the object type anyway – it has hardly any members. Where … Read more
A function/variable declared as @objc is accessible from Objective-C, but Swift will continue to access it directly via static or virtual dispatch. This means if the function/variable is swizzled via the Objective-C framework, like what happens when using Key-Value Observing or the various Objective-C APIs to modify classes, calling the method from Swift and Objective-C … Read more
ExpandoObject provides access both via dynamic and via IDictionary<string,object> – so you could just use the dictionary API: var byName = (IDictionary<string,object>)account.features; bool val = (bool)byName[“isEmailEnabled”]; Or if the name is fixed, just: bool val = ((dynamic)account).features.isEmailEnabled;
You can simply assign a function as an expression and return proper class from there. Edit: there is also better solution for dynamic classes. Please see note below. Snippet from view: <div ng-class=”appliedClass(myObj)”>…</div> and in the controller: $scope.appliedClass = function(myObj) { if (myObj.someValue === “highPriority”) { return “special-css-class”; } else { return “default-class”; // Or … Read more