In python 3.x, it is common to use return type annotation of a function, such as: def foo() -> str: return “bar” What is the correct annotation for the “void” type? I’m considering 3 options: def foo() -> None: not logical IMO, because None is not a type, def foo() -> type(None): using the best … Read more
What is the best way to unit test a method that doesn’t return anything? Specifically in c#. What I am really trying to test is a method that takes a log file and parses it for specific strings. The strings are then inserted into a database. Nothing that hasn’t been done before but being VERY … Read more
This question already has answers here: Is there a difference between foo(void) and foo() in C++ or C? (4 answers) func() vs func(void) in C99 (4 answers) Closed 4 years ago. What is better: void foo() or void foo(void)? With void it looks ugly and inconsistent, but I’ve been told that it is good. Is … Read more
Let’s say I have the following functional interface in Java 8: interface Action<T, U> { U execute(T t); } And for some cases I need an action without arguments or return type. So I write something like this: Action<Void, Void> a = () -> { System.out.println(“Do nothing!”); }; However, it gives me compile error, I … Read more
I’ve just come across someone’s C code that I’m confused as to why it is compiling. There are two points I don’t understand. The function prototype has no parameters compared to the actual function definition. The parameter in the function definition does not have a type. #include <stdio.h> int func(); int func(param) { return param; … Read more
How to mock methods with void return type? I implemented an observer pattern but I can’t mock it with Mockito because I don’t know how. And I tried to find an example on the Internet but didn’t succeed. My class looks like this: public class World { List<Listener> listeners; void addListener(Listener item) { listeners.add(item); } … Read more
<a href=”javascript:void(0)” id=”loginlink”>login</a> I’ve seen such hrefs many times, but I don’t know what exactly that means. 1 14 The void operator evaluates the given expression and then returns undefined. The void operator is often used merely to obtain the undefined primitive value, usually using “void(0)” (which is equivalent to “void 0”). In these cases, … Read more
