Recent questions tagged class

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I am pretty new to Python world and trying to learn it. This is what I am trying to achieve: I want to create a ... a = Car("bmw") a.showName() See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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class - Calling Java from MATLAB

I have been using Swig to create a Java wrapper for a a library written in C++. The wrappers get ... class "com.example.reader.SimpleReader"' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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class design - In C#, use of value types vs. reference types

My questions are: When should we use value types and when reference types? What are the advantages and ... understand that as well. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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class - Java Method with Enforced Array Size Parameters?

I would like to create an initialisation method for a Java class that accepts 3 parameters: Employee[] ... contain different sized arrays. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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class - Print the Python Exception/Error Hierarchy

Is the any command line option in python to print the Exception/Error Class hierarchy? The ... library/exceptions.html#exception-hierarchy See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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518 views

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class - Limitation with classes derived from generic classes in swift

I'm trying to derive my class from generic class: class foo<T> {} class bar : foo<Int> {} But this ... avoid this limitation? Is it possible? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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575 views

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class - Can you fire an event when Android Dialog is dismissed?

Say I have a created a dialog in my Android app like so: private static ProgressDialog dialog; dialog = ... within a static class). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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507 views

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class - Difference between creating an instance variable and creating a new object in Java?

I understand the difference between creating an object and creating a variable. For example: private int number; MyClass ... are we doing here? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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575 views

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class - C++ runtime knowledge of classes

I have multiple classes that all derive from a base class, now some of the derived classes will not ... dynamically loadable libraries instead. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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class - Purpose of Dummy Parameter in Postfix Operator Overload? c++

When overloading the postfix operator, I can do something simple like Class Foo { private: int someBS; public: / ... to know the reason behind. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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601 views

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class - Python: get only classes defined in imported module with dir()?

I've got a module written in Python. I now want to import it into another script and list all classes I defined ... a way to do this in Python? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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792 views

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class - PHP: Maximum execution time of 30 seconds exceeded

I have a php app that calls a class called Client. Every so often I get a sort of time out error. I thought ... 's going on here? thanks, Billy See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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536 views

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class - Calling methods of "parent" component in Java

I have the following situation I think would be best to show in sample program code. I have a Java class that extends ... TopPanel } } } ); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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633 views

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class - How to access a private member inside a static function in PHP

I have the following class in PHP class MyClass { // How to declare MyMember here? It needs to be ... access it inside static functions? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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594 views

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class - Disallow subclasses from overriding Java method

Suppose I have a method in a Java class, and I don't want any subclass of that class to be able to override that method. Can I do that? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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631 views

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class or method alias in java

I have long java class and method names LONGGGGGGGGGGGGGGGClass.longggggggggggggggggggggggggMethod(); I want to alias it to ... this be done? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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840 views

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class - Is it possible to do partial inheritance with Python?

I'm creating a class (class0) in Python that is a currently based off of one class (class1); however, I'd ... a single method form a class2? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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537 views

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class - Java: where do static fields live within the memory?

If we store objects in static fields of an object, how does the JVM allocate the memory for it? Does ... fields different from object fields? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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536 views

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class - Does C have classes?

Okay, you may call me a noob but I'm realling confused. My ex classmate paid me to write a program in C. She ... a life, this is not 1984 yet. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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560 views

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class - ReactJS - Call One Component Method From Another Component

I have two components. I want to call a method of the first component from the second component. How can I ... ; } } export default PopupOver; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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413 views

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class - Why are classes inside Scala package objects dispreferred?

Starting with 2.10, -Xlint complains about classes defined inside of package objects. But why? Defining a class ... objects in the first place. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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600 views

1 answer

class - Where is the Python documentation for the special methods? (__init__, __new__, __len__, ...)

Where is a complete list of the special double-underscore/dunder methods that can be used in classes? (e.g ... , __new__, __len__, __add__) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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525 views

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class - Different ways of initializing an object in c++

Imagine this class: class Entity { public: int x, y; Entity() : x(0), y(0) { } Entity(int x, int y) ... m not sure which one I should use when. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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584 views

1 answer

class - Why can't Swift initializers call convenience initializers on their superclass?

Consider the two classes: class A { var x: Int init(x: Int) { self.x = x } convenience init() { self ... init in A will do just fine? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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599 views

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class - 'int' object is not callable in python

I got this and I was expecting it to print 410 when I print x.withdraw(). Kyle 12345 500 Traceback ( ... something wrong with my method calling? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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612 views

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class - PHP Get Returned Value From Constructor

I am confused, I have a PHP class with a constructor: class Test { public function __construct() { return " ... some text" from the constructor? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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590 views

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class - Assign a new value to Golang structure field

I have a problem with structure fields. I've created a class Point with one method Move() that increases or decreases ... .Move() st.Print() } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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499 views

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class - How to find out the declared type of an identifier in Java?

I have a simple class Apple extends from another simple class Fruit. At run-time, I could use Fruit fruit = new ... Which in this case is Fruit. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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