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
79,881
questions
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24
views
Javascript: Any way to create a class by constructing class name using strings/variables dynamically without eval?
I've tried myriads of ways to create new class instances dynamically, without using eval and hard coded key-value pairs, to no avail. Seemingly there is no way in modern Javascript to query the user ...
- 21
0
votes
0
answers
15
views
Prevent VS Code suggesting turning a function into a class
I have an issue with VS Code suggestion turning a function in JS into a class. It gives the following suggestion message:
This constructor function may be converted to a class declaration. ts(80002)
...
- 12.1k
1
vote
0
answers
35
views
PHP - Issue when adding a return type declaration for a parent class [closed]
I have currently have the following classes:
class Textarea Extends Field {}
class Field {}
I'm trying to declare a return type for the following function
public function field(string $field): Field
...
- 15
0
votes
0
answers
22
views
Why re-assign class methods to `this` in constructor in tappable Hook class?
Here is the code in webpack tappable source code:
class Hook {
constructor(args = [], name = undefined) {
this._args = args;
// ...
this.compile = this.compile;
this.tap = this.tap;
...
- 1
-2
votes
0
answers
48
views
Compare two maps where the values are class objects [closed]
I'm trying to compare two hashmaps where the values are class objects. I know the .equals() for the class can be overridden so it would compare the values rather than instances but what if the class ...
- 23
0
votes
1
answer
34
views
R Reference Class Add New Variable by Name
Consider the following R code :
MyClass <- setRefClass("MyClass",
fields = list(
),
methods = list(
initialize = function(x){
#give new attribute x
...
- 344
1
vote
0
answers
18
views
How to import a library from VBScript into another asp file using Jscript?
I'm Having trouble trying to import a library written in VBScript to another asp file written with Jscript. Im new to both script languages, however I was wondering if it was possible to cross-use ...
0
votes
2
answers
35
views
access a component in a tkinter frame class from another frame class
I created a 2 Frames application in tkinter inspired by https://www.geeksforgeeks.org/how-to-change-the-tkinter-label-text/. The purpose is to import a new image by clicking on the start button, and I ...
- 59
0
votes
1
answer
29
views
Can a generic Blazor Component handle multiple classes with the same structure?
I have created a Blazor Component to handle editing a database record which is defined by a class.
I would like this component to be reused to edit other records - that have the same structure, but ...
- 685
-3
votes
0
answers
21
views
How to Structure an Optimization Program Like Pyomo Using Only Functions Instead of Classes? [closed]
Pyomo is a popular Python library for formulating and solving optimization problems. It uses an object-oriented approach where variables, objective functions, and constraints are defined as attributes ...
- 1
-1
votes
0
answers
59
views
Why is constructor called, not overloaded operator=? [duplicate]
In the following code (also here: godbolt)
Why is the constructor for myParam called in the assignment in main() and not the operator= overload?
What can I do to force the assignment?
Thanks!
#include ...
-11
votes
0
answers
63
views
What's the difference between 'ClassName* p' and 'ClassName p'? [duplicate]
Please explain to me the difference between Player p and Player* p.
Why should I write it like this:
Player *p = new Player(playwin, 1, 1, '#');
while (p->getmv() != 'x')
{
p->display();
...
0
votes
0
answers
12
views
set value for conditional initializer property in class model
given below was my model:
public class RelationContentTypeObject
{
[JsonProperty("$id")]
private string IdField { get; set; }
[JsonProperty("$ref")]
private string ...
- 17
1
vote
1
answer
40
views
Typescript how to get type of optional properties of class or interface
class Load {
ID: number;
Action?: string;
public getType(name: string) {
return typeof this[name];
}
constructor() { }
}
let _load =new Load()
_load.ID = 5
...
1
vote
1
answer
80
views
How do I use std::reference_wrapper to store the reference in an std::unordered_map?
I'm trying to learn the use of std::reference_wrapper and std::ref and the use cases of it.
Here is a sample code I wrote. Please help me solve the compilation error. And it would be great if you can ...
- 13