class

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 3 years ago . I know in python it is good practice to have a models.py and put all of an application's model classes in there. Does the same apply to swift or is it better to have a separate file for each model class? Thanks! 回答1: Apple recommends to have separate files for each model

问题 I wonder if there is a way to make a class instance that accepts parameters and generate results according to this parameter. This is very common in VB.net built-in classes, but I wonder how to make it myself Dim myNumbers as new NUMBERS myNumbers.First = 1 myNumbers.Second = 2 Msgbox(myNumbers(1,2,3,4,5,5).max) In the above code myNumber is a class which accepts some numbers and return the max. 回答1: You can use Default properties in order to achieve that. If you don't want it to be Set -able

问题 I have some problem how to initial package from class file from another directory File file=new File("D:\\java\\myproject\\Name_pack\\time\\MyClass.class"); URL[] cp = { new File(file.getParent()).toURI().toURL() }; URLClassLoader urlcl = new URLClassLoader(cp); Class cls = urlcl.loadClass(file.getName().replaceAll("\\.class",""); if class file not contain a package, it's working. but it's contains a package, i get some error like this : Exception in thread "AWT-EventQueue-0" java.lang

问题 This question already has answers here : When should you use a class vs a struct in C++? (25 answers) Closed 3 years ago . Is there ever an advantage of declaring a struct in C++? Why shouldn't I just make a class consisting only of data members(i.e. no methods)? Thanks, 回答1: When you have a POD type where everything is public is saves a line... struct Color { int r; int g; int b; }; vs class Color { public: int r; int g; int b; }; And it's also common practice for objects which are just dumb

问题 Is it possible to instantiate a class and then invoke its methods between scriptlets in JSP? I am getting errors and I don't know why (java class and methods are fine). Any other way to do the same (i just want a string from a method in a class)? 回答1: Yes of-course. You can create objects for your classes and access their methods between scriptlets in JSP like this. <% Foo foo = new Foo(); foo.method1(); %> Another way of doing this is using useBeans of jsp to instantiate the class and access

问题 I would like to know if a class is removed. something like: if(".class" is removed) then { get class.object} I need to know it, because I need the object in wich the class is being removed. Thanks, Mark 回答1: Use hasClass: if($("selector").hasClass(".class")) {...} 回答2: If you can be sure that the removal happens via jQuery, hook the method. var _oldremove = jQuery.fn.removeClass; jQuery.fn.removeClass = function() { if( arguments[0] === 'the_class_you_are_looking_for' ) { // do something with

问题 in MATLAB I have different classes A & B . I want to assign objects created from class A & B as properties in both A & B . My code looks like this classdef A < handle properties container end methods function object = A() end end end and this classdef B < handle properties container end methods function object = B() end end end Then I am assigning both objects from class A & B to the container -property from both classes A & B , like object_from_class_A.container = object_from_class_A and

问题 When I run it, it keeps telling me the dataframe object is not callable. class OptionDataWebGleaner(): def __init__(self): ticker = pd.read_csv('Yahoo_ticker_List.csv')['AUB.AX'].values stock = raw_input('Please give the ticker of your selected option?\n') if stock in ticker: self.stock = stock else: raise TypeError('Your option is not available here.') date_norm = raw_input('Please give your maturity date in the format of mm/dd/yyyy\n') maturity_date = datetime.strptime(date_norm, '%m/%d/%Y'

问题 I am not advanced in C++. Suppose I have a group of classes, from A to whatever (the number will grow in time), that use the same type of constructor. Suppose it looks like this: class A { private: double m_x, m_y; public: A(const double &x, double &y, const short &n) { ... }; }; Each of these classes have the same m_x, m_y variables, but they calculate it differently. Now there's another class, say Bla , who needs to use the constructors from the previous group of classes, something like

问题 There are two classes. MainActivity, in which i set the view, and ClassX from which i want to update a view in MainActivity. ClassX is an AsyncTask called from MainActivity, if that's relevant. What i want to do is to change the text of a view called mainTextLog. I've declared a global TextView variable, and in the onCreate() method i set it to the view using findViewById(). private TextView logger; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);