30,485 questions
0
votes
1
answer
39
views
Is it possible to change the return type of a method based on what is passed in as a parameter? [duplicate]
Is it possible for the same method have different return types based on what is passed in, so that for example GetScripts(new Camera()) returns a Camera and GetScripts(new Cube()) returns a Cube?
I ...
- 25
0
votes
1
answer
28
views
Coq Error Syntax error: '.' expected after [gallina] (in [vernac_aux])
So I have this code:
Require Import Unicode.Utf8.
Require Import String.
Inductive AExp :=
| avar : string → AExp
| anum : nat → AExp
| aplus : AExp → AExp → AExp
| amul : AExp → AExp → AExp.
...
- 3
0
votes
0
answers
27
views
My Angular HTML Page doesn't load after populating ng2-chart datasets' data
I'm currently working on an Angular project to develop a dashboard of sorts.
public donutChartData: any = {
labels: [],
datasets: [
{
data: [1, 1, 1],
backgroundColor: [
...
- 1
1
vote
1
answer
32
views
Why do scikit-learn predict(X) methods accept a 2D matrix rather than a 1D vector?
Does anyone know why the predict(X) methods of scikit-learn classifiers and regressors expect input X to be a 2D array (matrix) rather than a 1D array (vector)? I'm just curious about the history of ...
- 11
0
votes
0
answers
70
views
Is there a way to slow down the code execution of a method? [closed]
I am trying to make a method related to the movements of the ghosts in a PacMan game. However, I would like to find a way to delay the ghost movements by 1 tick (250 ms) everytime before I call the ...
- 9
1
vote
1
answer
26
views
Directly calling a method in JS works, but not with .call or .apply
I have a node resulting from a call
let node = document.getElementById('myID');
node is a Node, which has a classList object that has a remove() method
This works for me:
node.classList.remove('alert'...
2
votes
2
answers
72
views
How can I define a vararg with three types in Java?
Since I need a Java method to receive any number of objects of three specific classes I decided to use a vararg ... to implement it. However, I have the restriction that these three classes are:
java....
- 988
-2
votes
0
answers
41
views
Can i manipulate variable of class using its method [duplicate]
class example():
id = 1
def __init__(self, name):
self.name = name
def incr(self):
my_id = id
id += 1
def info(self):
print(self.name)
(global id) isn't working
I want ...
-1
votes
0
answers
30
views
Why does “this” change when calling an object method as a standalone function? [duplicate]
I’m learning JavaScript and have a question about the this keyword when dealing with object methods. Specifically, I’m seeing a different behavior when I assign an object method to a variable and call ...
- 11
0
votes
0
answers
53
views
Search results undefined while loading from controller on Rails view
I am trying to do search functionality for my Rails MVC learning. I am adding title , description and category name as filter columns. And checking each parameter id defined in my model class using ...
- 2,815
0
votes
0
answers
20
views
Javascript - How to recursively call a method as a callback? [duplicate]
As a learning exercise, I'm making a Javascript browser game where when the user presses a button, it simulates rolling several 6-sided dice and then shows images that correspond to the random value ...
-1
votes
1
answer
88
views
I need help formatting this code as a Ruby method [closed]
So, I have passing code for what I am trying to achieve. Now I need to format it in a method format that takes two parameters. I have more experience with JavaScript functions at this point and am ...
3
votes
1
answer
36
views
How can I dynamically add methods to a Python class at runtime while preserving their type annotations?
from typing import Callable
class MyClass:
pass
def dynamic_method(self, x: int, y: str) -> str:
return f"{x} - {y}"
setattr(MyClass, 'dynamic_method', dynamic_method)
...
-1
votes
1
answer
36
views
Unable to pass self.instance_variable as default into a class method
I have a class and method that I am trying to pass a self.instance_variable as default but am unable to. Let me illustrate:
from openai import OpenAI
class Example_class:
def __init__(self) -> ...
- 474
-2
votes
1
answer
46
views
Is dunder an official designation for `__method__` in Python?
In a Python class you can use methods whose name is preceded and followed by a double underscore, which are called by a "special" syntax which is not the usual object.method() syntax.
For ...
- 4,004