You could consider using a class attribute to provide a counter. Each instance needs only to ask for the next value. They each get something unique. Eg: from itertools import count class Obj(object): _ids = count(0) def __init__(self): self.id = next(self._ids)
You can use setattr (be careful though: not every string is a valid attribute name!): >>> class AllMyFields: … def __init__(self, dictionary): … for k, v in dictionary.items(): … setattr(self, k, v) … >>> o = AllMyFields({‘a’: 1, ‘b’: 2}) >>> o.a 1 Edit: let me explain the difference between the above code and SilentGhost’s … Read more
I wouldn’t bother trying to merge your Constants class with this class. It isn’t worth the effort. Just create a new class that does what is necessary for ACRA. Like this: public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); // do the ACRA init here } } Now you need to … Read more
Like many modern languages, VB6 has value types and reference types. Classes define reference types. On the other hand, your basic types like Integer are value types. The basic difference is in assignment: Dim a as Integer Dim b as Integer a = 2 b = a a = 1 The result is that a … Read more
Here’s some supplemental information that may help better understand several of the other shorter, although technically correct, answers. In the strictest sense a Class Factory is a function or method that creates or selects a class and returns it, based on some condition determined from input parameters or global context. This is required when the … Read more
To be clearer, I make an example here, class ClassA { class func func1() -> String { return “func1” } static func func2() -> String { return “func2” } /* same as above final class func func2() -> String { return “func2” } */ } static func is same as final class func Because it … Read more
Fortran does not have templates, but you can put the code common to the functions handling different types in an include file as a kludge to simulate templates, as shown in this code: ! file “cumul.inc” ! function cumul(xx) result(yy) ! return in yy(:) the cumulative sum of xx(:) ! type, intent(in) :: xx(:) ! … Read more
Using Mirror Here’s a pure Swift solution with some limitations: protocol PropertyNames { func propertyNames() -> [String] } extension PropertyNames { func propertyNames() -> [String] { return Mirror(reflecting: self).children.flatMap { $0.label } } } class Person : PropertyNames { var name = “Sansa Stark” var awesome = true } Person().propertyNames() // [“name”, “awesome”] Limitations: Returns … Read more
In R every “object” has a mode and a class. The former represents how an object is stored in memory (numeric, character, list and function) while the later represents its abstract type. For example: d <- data.frame(V1=c(1,2)) class(d) # [1] “data.frame” mode(d) # [1] “list” typeof(d) # list As you can see data frames are … Read more
They are access modifiers and help us implement Encapsulation (or information hiding). They tell the compiler which other classes should have access to the field or method being defined. private – Only the current class will have access to the field or method. protected – Only the current class and subclasses (and sometimes also same-package … Read more