static-methods

Is super() not meant to be used with staticmethods? When I try something like class First(object): @staticmethod def getlist(): return ['first'] class Second(First): @staticmethod def getlist(): l = super(Second).getlist() l.append('second') return l a = Second.getlist() print a I get the following error Traceback (most recent call last): File "asdf.py", line 13, in <module> a = Second.getlist() File "asdf.py", line 9, in getlist l = super(Second).getlist() AttributeError: 'super' object has no attribute 'getlist' If I change the staticmethods to classmethods and pass the class instance to

In terms of memory and time, is it better to make a method static? Usually yes, there is no need to pass the "this" reference. That reference is passed in the ECX register so there is no additional stack space required. The register is already set if you make the call from an instance method of the same class, there will be no savings at all. But it can help relieving the pressure on a x86 CPU core when the method is in another class, x86 doesn't have a lot of registers. Seeing a measurable perf improvement would be exceedingly rare. I do religiously mark methods of a class that don't use

I'm writing an explanation for some code for a course, and have been accidentally using the words method and function interchangeably. I decided to go back over and fix the wording, but ran into a hole in my understanding. From what I understand, a subroutine is a function if it doesn't act on an instance of a class (its effect is restricted to its explicit input/output), and is a method if it operates on an instance of a class (it may carry out side effects on the instance that make it impure). There's a good discussion here on the topic. Note that by the accepted answer's definitions, a

I am supposed to do the following: Write a Java application (Client) program with a static method called generateEmployees( ) that returns a random list of 10 different types of Employee objects. You could either use an array or an ArrayList to store the employee objects that will be returned. Use a for loop to populate randomly different types of employee objects with some random data. You could possibly think a range of values like 1 – 4. If random value is 1, create a HourlyEmployee object with some randomly generated data, if 2, SalariedEmployee object with some random data and so on. I

In my c# code I have a static method. Here is the code sample: public class RandomKey { public static string GetKey() { Random rng = new Random(); char[] chars = new char[8]; for (int i = 0; i < chars.Length; i++) { int v = rng.Next(10 + 26 + 26); char c; if (v < 10) { c = (char)('0' + v); } else if (v < 36) { c = (char)('a' - 10 + v); } else { c = (char)('A' - 36 + v); } chars[i] = c; } string key = new string(chars); key += DateTime.Now.Ticks.ToString(); return key; } } I am calling this function from another Class's method. Class SomeClass { Void SomeMethod() { for(int i=0; i<100; i++) {

If I define: class Bar(object): @staticmethod def bar(): # code pass class Foo(Bar): # code pass Is it possible for a function call Foo.bar() to determine the class name Foo? Replace the staticmethod with a classmethod. This will be passed the class when it is called, so you can get the class name from that. class Bar(object): @classmethod def bar(cls): # code print cls.__name__ class Foo(Bar): # code pass >>> Bar.bar() Bar >>> Foo.bar() Foo If you need to find the class information, the appropriate way is to use @classmethod . class Bar(object): @classmethod def bar(cls): # code print(cls._

Currently using a large platform in PHP. The server it's hosted on has recently been upgraded to PHP 5.4. Since, I've received many error messages like: [Sat May 26 19:04:41 2012] [error] PHP Strict Standards: Non-static method Config::getData() should not be called statically, assuming $this from incompatible context in /xxx/Config.inc.php on line 35 The example method is defined as (note the lack of 'static' keyword): function &getData() { $configData =& Registry::get('configData', true, null); if ($configData === null) { // Load configuration data only once per request, implicitly // sets