method-signature

I often find myself overwriting methods of a parent class, and can never decide if I should explicitly list given parameters or just use a blanket *args, **kwargs construct. Is one version better than the other? Is there a best practice? What (dis-)advantages am I missing? class Parent(object): def save(self, commit=True): # ... class Explicit(Parent): def save(self, commit=True): super(Explicit, self).save(commit=commit) # more logic class Blanket(Parent): def save(self, *args, **kwargs): super(Blanket, self).save(*args, **kwargs) # more logic Perceived benefits of explicit variant More

In the above declaration, what is the <T> for? I would like to know the difference between having <T> and not having it? How does it affect the code? <T> here indicates the type is implied from the arguments. So: public static <T> List<T> createList(T... args) { List<T> ret = new ArrayList<T>(Arrays.asList(args)); } can be used: List<String> list = createList("one", "two", "three"); or List<Integer> list2 = createList(1, 2, 3); it just means that you will get the same class out of that method that you're putting in, to save it being Object and you having to cast all the time. The <T> is the

As part of the compiler for the programming language I am working on, I came across generic signatures in the bytecode, which I am trying to parse and convert to an AST. The parsing algorithm mostly works, but there seems to be a special case in which the format of these signatures behaves a bit strangely. Here are a few of these cases: java.util.Arrays#parallelSort: <T::Ljava/lang/Comparable<-TT;>;>([TT;)V java.util.Arrays#parallelSort: <T::Ljava/lang/Comparable<-TT;>;>([TT;II)V java.lang.Class#getAnnotation: <A::Ljava/lang/annotation/Annotation;>(Ljava/lang/Class<TA;>;)TA; java.lang.Class

Some predefined methods contain a ParamArray in their signature. Delegates, however, cannot contain a ParamArray in their signature. Question: Assume you wish to create a delegation mechanism for a specific method which requires a ParamArray. How would you work around this constraint? EDIT: just to make clear, assume you cannot change the method signatures themselves (pre-defined methods, defined by some 3rd party, be it Microsoft or not). EDIT2: The real deal here is keeping the syntax sugar , because the following code does work, but eliminates the sugar: Public Delegate Sub MyDelegate(ByVal

I have a method that varies by a single method call inside, and I'd like to pass the method/signature of the method that it varies by as an argument... is this possible in Objective C or is that too much to hope for? NSInvocation is a class for wrapping up a method calls in an object. You can set a selector (method signature), set arguments by index. You can then set a target and call invoke to trigger the call, or leave the target unset and use invokeWithTarget: in a loop of some sort to call this on many objects. I think it works a little like this: NSInvocation *inv = [[NSInvocation alloc]

I want to declare type definition for a member function signature. Global function typedefs look like this: typedef int (function_signature)(int, int); typedef int (*function_pointer) (int, int); But I'm not able to the same thing for a member function: typedef int (foo::memberf_signature)(int, int); // memberf_pointer is not a member of foo typedef int (foo::*memberf_pointer)(int, int); It sounds logically to me, because "foo::" ist the syntax to access a member in the class foo. How can I typedef just the signature? For questions regarding the awkward function pointer syntax, I personally