That’s correct. You can find more about it in the Oracle guide on varargs. Here’s an example: void foo(String… args) { for (String arg : args) { System.out.println(arg); } } which can be called as foo(“foo”); // Single arg. foo(“foo”, “bar”); // Multiple args. foo(“foo”, “bar”, “lol”); // Don’t matter how many! foo(new String[] { … Read more
This example uses memoization, basically storing values in a table (dictionary in this case) so you can look them up later instead of recalculating them. Here we use a simple class with a __call__ method to calculate factorials (through a callable object) instead of a factorial function that contains a static variable (as that’s not … Read more
Java supports* covariant return types for overridden methods. This means an overridden method may have a more specific return type. That is, as long as the new return type is assignable to the return type of the method you are overriding, it’s allowed. For example: class ShapeBuilder { … public Shape build() { …. } … Read more
You could write something like that : public static bool HasMethod(this object objectToCheck, string methodName) { var type = objectToCheck.GetType(); return type.GetMethod(methodName) != null; } Edit : you can even do an extension method and use it like this myObject.HasMethod(“SomeMethod”);
A name in Java, or any other language, is too long when a shorter name exists that equally conveys the behavior of the method.
Objective-C methods are designed to be self documenting, and they borrow from the rich tradition of Smalltalk. I’ll try to explain what you have here, -(NSInteger) pickerView:(UIPickerView*)pickerView numberOfRowsInComponent:(NSInteger)component. – (NSInteger) This first portion indicates that this is an Objective C instance method that returns a NSInteger object. the – (dash) indicates that this is an … Read more
Some random thoughts: ‘Create’ fits the feature better than most other words. The next best word I can think of off the top of my head is ‘Construct’. In the past, ‘Alloc’ (allocate) might have been used in similar situations, reflecting the greater emphasis on blocks of data than objects in languages like C. ‘Create’ … Read more
Some conventions list all the public methods first, and then all the private ones – that means it’s easy to separate the API from the implementation, even when there’s no interface involved, if you see what I mean. Another idea is to group related methods together – this makes it easier to spot seams where … Read more
You can use the .some method referenced here. The some() method tests whether at least one element in the array passes the test implemented by the provided function. // test cases const str1 = ‘hi hello, how do you do?’; const str2 = ‘regular string’; const str3 = ‘hello there’; // do the test strings … Read more
When you write .class after a class name, it references the class literal – java.lang.Class object that represents information about a given class. For example, if your class is Print, then Print.class is an object that represents the class Print on runtime. It is the same object that is returned by the getClass() method of … Read more