inspect.ismethod is what you want to find out if you definitely have a method, rather than just something you can call. import inspect def foo(): pass class Test(object): def method(self): pass print inspect.ismethod(foo) # False print inspect.ismethod(Test) # False print inspect.ismethod(Test.method) # True print inspect.ismethod(Test().method) # True print callable(foo) # True print callable(Test) # True … Read more
Real answer: no. It’s an instance property, so you can only call it on an instance. You should either create an instance, or make the property static as shown in other answers. See MSDN for more information about the difference between static and instance members. Tongue-in-cheek but still correct answer: Is it possible to get … Read more
I’m not entirely sure what use case you are trying to satisfy. But it is possible to have a factory return instances of an object. You should be able to modify this to suit your needs. var ExampleApplication = angular.module(‘ExampleApplication’, []); ExampleApplication.factory(‘InstancedService’, function(){ function Instance(name, type){ this.name = name; this.type = type; } return { … Read more
There is no polymorphism for fields in Java. There is however, inheritance. What you’ve effectively done is create two fields in your Rectangle class, with the same name. The names of the field are, effectively: public class Rectangle { public int Shape.x; public int Rectangle.x; } The above doesn’t represent valid Java, its just an … Read more
Try this: Your main program creates a named pipe or other interprocess communication facility and listens on it. You create a separate small program that, when run with an NZB file as a parameter, opens the pipe, feeds the file info into it, and exits. Your main program then processes the new file and downloads … Read more
From here, a static call is 4 to 5 times faster than constructing an instance every time you call an instance method. However, we’re still only talking about tens of nanoseconds per call, so you’re unlikely to notice any benefit unless you have really tight loops calling a method millions of times, and you could … Read more
First of all, you cannot reassign a loop variable—well, you can, but that won’t change the list you are iterating over. So setting foo = 0 will not change the list, but only the local variable foo (which happens to contain the value for the iteration at the begin of each iteration). Next thing, small … Read more
You wouldn’t be able to use different seeds if it were static – the Random instance keeps track of that state. By default Random uses the current time as seed, but re-using a particular seed (i.e. new Random(42)) allows you to exactly repeat the sequence of random numbers – they will always be the same … Read more
At novice level : Use instance variables when : Every variable has a different value for different object. E.g. name of student, roll number etc.. use static variables when : The value of the variable is independent of the objects (not unique for each object). E.g. number of students.
You shouldn’t generally try to access the controller from the model for high-minded issues I won’t go into. I solved a similar problem like so: class Account < ActiveRecord::Base cattr_accessor :current end class ApplicationController < ActionController::Base before_filter :set_current_account def set_current_account # set @current_account from session data here Account.current = @current_account end end Then just access … Read more