Questions tagged [class]
A template for creating new objects that describes the common state(s) and behavior(s). NOT TO BE CONFUSED WITH HTML CLASSES OR CSS CLASS SELECTORS. Use [html] or [css] instead.
class
79,839 questions
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How to show class method comments (docstrings?) from the implementation section in hover hints?
I'd like to document the code I currently have to write as good as poosible.
According to the lazarus documentation:
The Lazarus IDE can display tooltip hints when mouseovering identifiers.
From my ...
- 33
4
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1
answer
83
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How to create a class that generates auto-updateable plots
I want to create a class that will create updateable plots. I plan on having 8-16 figures in one window, so it would be nice to have a class that would initiate these for me. These graphs will auto-...
- 67
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1
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106
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How to make a generalized template class? [closed]
I've done some amateur object-oriented programming in C++ and I have a quick question of what is possible when creating your own class.
I've attempted to make a generalized 3-tuple template class that ...
1
vote
1
answer
107
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Class objects inaccessible for the subs other than the one the object has been instantiated
I run calculations with muliple subs and functions looping up to get a result. Based on the number of iterations done by counters I change some variables to suit my needs. So far the counters have ...
- 23
Best practices
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8
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52
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Initialize a Typescript class property once
Let's say I have a class with many parameters. In Typescript, this is how the class is created:
...
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3
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71
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Python Inheritance Class Argument NameError
I’ve searched the space of Python nested class inheritance and have read that it's not best practice. I have a NameError on the following:
...
- 2,713
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4
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224
views
Is it safe to use public functions in C++?
I am creating a program with C++ language that working with strong cryptography.
Does it matter if I use public or private functions where contains a secret algorithms, any sensitive structures of ...
- 43
3
votes
1
answer
112
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Powershell Class generic interface arguments type resolution problem
Can't seems to find why generic interface types are allowed in powershell class argument attributes, but they can't accept anything - powershell class type resolution doesn't work in this case. Is ...
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2
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96
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JavaScript: How many objects are allocated when returning an object literal from a class constructor?
Let's say I have this code:
class MyClass {
constructor() {
return {};
}
}
const x = new MyClass(); // how many objects are instantiated with this?
...
- 4,046
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2
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121
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How to break circular dependency in Python class when trying to separate a simple wrapper class from a heavier implementation?
I am trying to build a small scale deep learning framework. I defined my tensor class as follows
...
- 217
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2
answers
113
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Verbose in class with "using module" directive
I faced a specific behavior while using verbose output in class.
This works like a charm:
...
Advice
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vote
4
replies
74
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Add an instance to a virtual subclass?
With abstract subclasses on can use register to add other classes as a "virtual" subclass, what would be a way to do that for a single instance based on it fullfilling some criteria?
The &...
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3
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65
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Best practices
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5
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90
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using variable of type Class<?> in switch construct
i'm in need of a data container for several data types and fail to write some omnipotent :-) converter func.
Maybe my idea is crab, in this case please give me a hint what concept to use.
My current ...
- 374
1
vote
2
answers
173
views
Trouble with VBA Class Instantiation [closed]
I've created a VBA Class module and written all the necessary code within it. When I go to use it, in Excel, I instantiate it in a global module as follows.
...
- 181
Advice
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4
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128
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VB.NET and classes and their sub-classes
I have a class in VB.NET. The definition of this class is re-defined according to need.
For example: TR as char(2), F1 as Char(10) then later TS as Char(2) F1 as float.
I want to define one class and ...
- 75
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1
answer
145
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In python is there a way to get len with int data type and not and index-sized integer? [duplicate]
I working on a code where it is necessary to have large integers, here is a simplified version of it (len_class.py):
...
- 31
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2
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148
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Create a custom method for all existing product types in WooCommerce
I want to create a custom method I can use for any WC_Product class, so I can use $product->get_lead_time(); anytime I have a product object available. I ...
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1
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95
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2
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1
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213
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Void function doesn't print elements of matrix C++
I'm trying to print elements of matrix (example will be below). Here is the following code written in Dev-C++:
...
- 11
2
votes
2
answers
130
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Subtlety in initializing attributes with methods in modules from the `equinox` `jax` library
I have the following code that defines an abstract class and its final subclasse. The two classes are both subclasses of the equinox.Module class, which registers ...
- 539
3
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4
answers
118
views
Why must classes be defined in order of appearance in python module?
Let's say I have a python file test.py that looks like this:
...
- 539
1
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3
answers
153
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Better way to override methods on an instance of a JavaScript class
In our JavaScript web app, we use a custom-made component framework. All of our components are defined as classes using the class syntax.
We can make child classes ...
- 738
1
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1
answer
85
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Update a class when the extended super class setter is used
I have an issue with the data within an extension class does not change when I change data within the super class.
This might be an XY issue or caused by the fact that I'm still not used to using <...
- 13.3k
-3
votes
1
answer
119
views
How can I pass a reference to an internal class upon construction of a public-facing subclass without violating nullabe safety?
I'm not super experienced with C#, and this is a bit of a puzzle. Consider the following code:
...
- 8,327
0
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1
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87
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One object has to work with part of data (line of an array) from another object
I'm not a professional programmer. I'm teaching my children and decided to create a solver to nonograms puzzles. The algorithm itself is not what concerns me, but the proper way to code it.
What I ...
- 138
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1
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147
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1
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1
answer
160
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Hide a class method programmatically
A while ago I wrote a small function to easily Use-ClassAccessors in PowerShell. I would like to add a new feature:
Any accessor method (in the form of ...
- 24.7k
-4
votes
4
answers
172
views
How to update string attributes to object instances if they exist [closed]
I'm trying to use a for loop to iterate through a set of objects, check if those objects store string data (specifically their 'Pokemon.evolution' variable) which ...
-5
votes
2
answers
106
views
attributes in a class [closed]
I am working on an example of a class called Car. Can you help clarify the difference between the attributes after the initialization statement and those within the ...
- 165
0
votes
1
answer
93
views
PHP autoloading with multiple third-party libraries [closed]
I'm writing a plugin that uses a few third-party libraries (one from a long-abandoned repo that I'm modifying). Library A uses Library B, and my code uses both.
In Library A are 50-odd files with ...
- 157
0
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1
answer
135
views
How to determine class of an element in Javascript
I want to determine the class name of existing table TD elements (using the Chrome Javascript).
My case is table rows all like
...
- 264
2
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1
answer
111
views
How to separate built-in object from user objects?
I'm trying to write a function TypeNameEx which will return a string which, using a call to VarType(), effectively identifies ...
- 21
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1
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260
views
What is the actual implementation of delphi helpers?
type
TTestHelper = class helper for TStringList
procedure Test;
end;
What is the actual implementation of Delphi class helpers? In the ...
- 187
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1
answer
151
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Unsure how to create relationships between classes within python
The classes works when separate, now, I want to create relationships between them. However, this has caused issues when I am trying to define the relationships.
For example:
...
- 21
0
votes
2
answers
264
views
Can the dot operator path be shortened?
In C++ I have variables in classes in classes. It often results in long dot operators to get to the variable. For example:
...
- 35
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2
answers
163
views
How do I make a variable declared in a class in C++
I have a variable, value, declared in a class, input. I want to use it inside main. Here is ...
0
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1
answer
67
views
How can I forbid method redefenition in TCL OO class?
I would like that method redefenition would result in failure and script execution stop. Like any other common error.
In the following example I want to see that method print cannot be redefined.
<...
-7
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1
answer
99
views
How can I pass a class type into a method and use it to create new objects of the class? [closed]
I have a situation where I have multiple csv files that I want to transform into various objects. So I have something like:
...
- 1
0
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2
answers
198
views
How do I correctly bind to / observe a non-observable object within SwiftUI?
I have a view, TimeEditView, that edits an object of an Item class I made. The class does not conform to ...
- 1
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1
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87
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How to reference current property value in class property attribute in PHP 8.4?
I've done a lot of Googling and may have missed this, there's so many examples of using the new Attribute feature in PHP but none of them show if this is possible. What I would like to be able to do ...
- 13
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2
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74
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Vector from Class objects vector as 2D vector function parameter
Solution requirements:
Pre C++11
Statements:
Function someFunction exists, that accepts 2D vector as vector of string vectors: ...
- 11
-1
votes
1
answer
111
views
Proper way to pass a class around SwiftUI views [closed]
I have a SwiftData class that I get with @Query private var items: [Item] in a SwiftUI view. Then I pass it to a sub view that passes it to other sub views. What is ...
1
vote
1
answer
69
views
In Lisp can't make-instance because :name isn't provided
This code creates an error: The slot COMMON-LISP-USER::NAME is unbound in the object
#<THING {1002B830F3}>.
I tried sbcl and clisp, both creating same problem. I can initialize instance of ash ...
- 47
-1
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1
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113
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Why doesn’t method overriding in Python affect the base class instance?
I'm a bit confused about how method overriding works in Python.
Let's say I have a base class with a method, and I override that method in a subclass. When I call the method from the subclass, the ...
0
votes
3
answers
127
views
Minifiying javascript file with webpack breaks vue functionality (specifically with method calls on class instance)
I am working on an ASP.NET project that uses Vue.js and jQuery. I have a JavaScript file (fields.js) that defines several classes (e.g., Users, Fields) and initializes a Vue instance. When I use the ...
- 139
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1
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Declareing array that stores a struct, which defined in another file included, gives the error "Incomplete Type "Array[]" is not allowed"
I have defined a struct in another file called file1.h (example) and when I declare an array using that struct in another file called File2.h, i get the error Message:
"Incomplete Type "...
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