instantiation

I'm trying to list classes I created in some folder in my Matlab folder - using only their name (class name) as an example, I have a class called 'SimpleString' - and I'm aiming to instantiate an object from that class, if all I know is that its name is 'SimpleString' So in realtime, I'd like to find out what classes are in a folder (done), then be able to instantiate any of those classes (my question) Thanks You can use eval to instantiate the class using just the class name. instance = eval('SimpleString'); However, if you're simply iterating through all the m-files in a folder containing

From Oracle's Java tutorials I've found this text: As with class methods and variables, a static nested class is associated with its outer class. And like static class methods, a static nested class cannot refer directly to instance variables or methods defined in its enclosing class — it can use them only through an object reference. Note: A static nested class interacts with the instance members of its outer class (and other classes) just like any other top-level class. In effect, a static nested class is behaviorally a top-level class that has been nested in another top-level class for

I'm trying to improve the performance of a javascript snippet evaluator . These script snippets can reference any number of variables that exist in a string-keyed map of json-like object graphs (IE: Json AST). I'm using JDK 1.6 and the embedded Rhinoscript engine (v1.6R2). Currently, processing takes the form: Snippet is parsed to discover the names of referenced variables Variables are retrieved from the map and serialized to a json string Json string is assigned to a similarly named variable at the start of the script Evaluate augmented script I'm trying to figure out how to skip the json

I have an interface Fruit with two implementations Apple and Banana . I want to create a Fruit instance. The choice whether the concrete implementation should be an Apple or a Banana should be made by the user. I did not yet design the user interface, so there is no restriction how this choice is made by the user. I know there are the following options: usage of the abstract factory pattern usage of reflection to create an instance from a given class name usage of reflection to create an instance from a given class object What are the pros and cons of these options? Please note that while

Assume, I have a subclass of EditTextPreference called PasswordProtectedEditTextPreference. This subclass basically shows a password dialog before one can edit the preference by the EditTextPreference 's own dialog. Now I define the preference in the corresponding preferences.xml like this: <edu.myproject.pwprefs.PasswordProtectedEditTextPreference android:key="pref_password" android:title="@string/pref_password_title" android:summary="@string/pref_password_summary" android:dialogTitle="@string/pref_password_dialog_title" android:dialogMessage="@string/pref_password_dialog_message"> </edu

I read many questions about this, but I still can't find what my problem is... I'm trying to instantiate a prefab at the canvas. It is compose of a button and a sprite. The button looks ok, but the sprite is not visible at the Game (but is visible at the Scene). I'm doing something wrong, but I can't see what... [SerializeField] GameObject finishedLevel; private void Start() { finishedLevel = Instantiate(finishedLevel, transform.position, transform.rotation); finishedLevel.transform.SetParent(GameObject.FindGameObjectWithTag("Canvas").transform, false); } SpriteRenderer is not made to be used

I am using a library that consists almost entirely of templated classes and functions in header files , like this: // foo.h template<class T> class Foo { Foo(){} void computeXYZ() { /* heavy code */ } }; template<class T> void processFoo(const Foo<T>& foo) { /* more heavy code */ } Now this is bad because compile times are unbearable whenever I include one of those header files (and actually I include many of them in each of my compilation units). Since as a template parameter I only use one or two types anyway I am planning to create, for each library header file, a file that contains only