Questions tagged [generic-function]
81 questions
0
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0 answers
Typing for a Python function that takes a generic class and returns a specific instance of that class
Suppose I have a class definition like this:
T = TypeVar('T')
class Collection(Generic[T]):
...
I want to create a function like this (Data is some container type):
T = TypeVar('T')
def get_data(typ: Type[T]) -> T[Data]:
return…
Levan Gharibashvili
- 63
- 3
0
votes
1 answer
List function max element treating empty container in c++
How do I treat situation if the list is empty? I want the program to print "Not possible to find max on an empty list" but the value must be returned...
template
T max(const std::list&l){
std::list l1=l;
auto…
Xavi
- 57
- 8
0
votes
1 answer
Std::istream& as function parameter
What is the best way to make a program that reads the elements from the input until the EOF and returns the container of read elements? This is what I have to do
p.h file:
#pragma once
#include
-
#include
Xavi
- 57
- 8
0
votes
1 answer
Model responsibility vs Generic Function
We have MVC application written in go lang
There are 2 endpoint that looks to query database to get all relevant users.
/get_paginate_users - > Query Database with paginate endpoint
/get_users -> [1, 2] -> Query Database with given ID.
To the sake…
Ratatouille
- 1,372
- 5
- 23
- 50
0
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0 answers
How can I make a generic function that accepts a specific property of the returning custom interface
I want to define a generic function accepting any type or Notification object. This object has a method property. the function should accept any output that has a method property and each output has it's own method type. I need to return a type that…
rostamiani
- 2,859
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- 74
0
votes
1 answer
How to have required and optional type parameters in a function and still have working type inference for recod lookup?
How to make a required type parameter Y in a function work together with another type parameter K where the latter is only used as a key in a record R = {a: 'aaa', b: 'bbb'} lookup and is not supposed to be explicitly provided? The type parameter K…
Peter Hudec
- 2,462
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0
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2 answers
Use methods inside a generic type
Consider this class:
public class A {
public void method_a(){
System.out.println("THIS IS IT");
}
}
I want to use 'method_a' in another function using generic type to get class A.
for example:
public class B {
public void…
Shahin Shemshian
- 356
- 1
- 11
0
votes
0 answers
R: Finding the code for the data.frame method of the [ function
In R, how do I look at the code for the data.frame method of the [ function?
I have tried the usual plain return on [.data.frame, [.data.frame, and [.data.frame, and none of them work, nor do any of them work with getAnywhere(). getMethod("[",…
andrewH
- 2,281
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0
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2 answers
Can I declare just one generic function in R like 'plot or 'summary' for more than one object of the class?
Like, I have four class gevp, gpdp, and others two, and I created generic function, plot and summary for each the four classes. And I were wonder if can I create just one generic function plot and summary, for the four classes, like inside that, I…
aliocha
- 5
- 3
0
votes
0 answers
Error when instantiating a class which has an attribute with generic types
The following code is not completely in English but you'll get the point.
class Student : public Osoba{
const int _brojIndeksa;
Kolekcija _polozeniPredmeti;
vector _seminarski; // naslovi seminarskih radova
…
developer10
- 1,450
- 2
- 15
- 31
0
votes
2 answers
Differences between generic functions and the use of Any
I am currently learn the use of generic functions and realized the problem that they solve with some existing examples in the documentation.
So instead I keep repeating functions that perform the same scheme, I can use generic functions that…
LettersBa
- 747
- 1
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- 27
0
votes
2 answers
Generic functions allow different order of arguments
I defined a generic function taking 2 arguments:
(defgeneric interact (a b))
The order of the arguments should not be important, so (interact x y) and (interact y x) should be the same, but I don't want to define two methods that do the same for…
cl-porky11
- 339
- 1
- 11
0
votes
2 answers
How can I write a generic function in c# which will call different functions based on the type of class?
I have following generic class:
public class SearchModel
{
public string Name { get; set; }
public int? UserId { get; set; }
public List result { get; set; }
}
public class A{
..
..
}
public class B{
..
..
}
and…
coder_kp
- 1
- 1
0
votes
2 answers
C# Populating Objects with PropertyInfo
I have the following classes:
User
public partial class User
{
public long iduser { get; set; }
public string email { get; set; }
public string name { get; set; }
public System.DateTime birthdate { get; set; }
public string about…
DanielD
- 47
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- 8
0
votes
1 answer
Editing default functions: Changing the default color of plot function in kernlab in R
Per the example in the kernlab documentation, plot makes a nice figure of the decision weights and boundary of an SVM model.
require(kernlab)
x<- rbind(matrix(rnorm(n=120,mean=-1,sd=2),,2),matrix(rnorm(120,mean=3,sd=2),,2))
y <-…
user1795995
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