type-alias Questions
6
Solved
Can typescript type alias support default arguments? For instance:
export type SomeType = {
typename: string;
strength: number;
radius: number;
some_func: Function;
some_other_stat: number = ...
Kenney asked 18/5, 2020 at 4:0
1
Python 3.12 has the type statement. How do I document the type alias properly?
I tried:
type Number = int | float
"""Represents a scalar number that is either an integer or float&quo...
Iconology asked 3/12, 2023 at 21:45
4
Solved
I'm trying to type hint a numpy ndarray like this:
RGB = numpy.dtype[numpy.uint8]
ThreeD = tuple[int, int, int]
def load_images(paths: list[str]) -> tuple[list[numpy.ndarray[ThreeD, RGB]], list...
Adjective asked 25/8, 2021 at 4:45
4
Solved
I have stumbled upon this type alias in code:
type LightSource = struct {
R, G, B, L float32
X, Y, Z, A float32
//...
}
My question is: what would be the reason to use a type alias like that ...
Malayoindonesian asked 28/1, 2019 at 13:4
2
Solved
In which file can I define a typealias that works in the whole project, etc.
typealias S = String
Cassy asked 28/1, 2016 at 15:43
7
Solved
I use typealiases in my Kotlin code a lot, but I wonder if I can enforce type-safety on them.
typealias Latitude = Double
typealias Longitude = Double
fun someFun(lat: Latitude, lon: Longitude) {...
Photosensitive asked 25/4, 2018 at 17:4
2
Solved
Consider this short piece of code
type A = number;
declare function f(): A;
const a = f(); // `a` is number, not A
Why does TS show a: number instead of a: A?
Meltage asked 23/9, 2019 at 10:36
4
Solved
Type alias:
type A = string
Type definition:
type A string
What is the difference between them? I can't understand from spec
Achromic asked 16/4, 2020 at 10:20
0
Is it somehow possible to have "annotation aliases" in Kotlin?
What I want to achieve is to transform this
@Colour("red")
fun method() = "something"
into something li...
Chandrachandragupta asked 9/6, 2022 at 10:16
2
In Swift, the following code compiles without issue.
protocol P1 {
associatedtype T = Int
}
protocol P2 {
typealias T = Int
}
To me, these appear to behave almost identically. The only differ...
February asked 10/4, 2019 at 22:26
1
Solved
I am trying to generate unique IDs from template template parameters. I tried this function
inline size_t g_id = 1;
template<template<typename> typename T>
inline size_t GetID()
{
sta...
Fuentes asked 31/10, 2021 at 14:45
3
Solved
I have seen some old questions/answers that said it's impossible to create a type alias on Flutter. I just want to make sure whether it's the case, as the language seems to have been updated numero...
Discriminator asked 19/1, 2021 at 4:17
2
Solved
What I have so far is this:
I've defined typealias completion handler
typealias UserCompletionHandler = (_ object: User?, _ error: ApiError?) -> Void
And I've created a service function that ...
Braided asked 6/4, 2021 at 13:55
1
Solved
I'm trying to reuse type hints from a dataclass in my function signature - that is, without having to type the signature out again.
What would be the best way of going about this?
from dataclasses ...
Breathed asked 17/3, 2021 at 22:7
2
Solved
Existing syntax allows us to write a default value for associated type:
trait Foo {
type Bar = i32;
}
I want something like C++:
trait Foo {
typedef int Bar;
}
This is not valid Rust code, but ...
Neille asked 24/11, 2020 at 15:10
2
Solved
This code:
pub type Foo<T: Read> = fn(bar: T);
yields error E0122 (in newer versions of Rust, it is only a warning):
An attempt was made to add a generic constraint to a type alias. Thi...
Pippa asked 17/6, 2016 at 0:14
3
Is it possible to do something like this in Golang?
package main
import "fmt"
type myFunType func(x int) int
var myFun myFunType = myFunType { return x } // (1)
func doSomething(f myFunType) ...
Episcopacy asked 19/7, 2019 at 8:20
2
As far as I know, the definition of the ViewModifier protocol looks like this:
protocol ViewModifier {
// content view type passed to body()
typealias Content
// type of view returned by body(...
Korte asked 10/9, 2020 at 12:19
2
I'm currently having issue getting aliasing to work properly. From my understanding, to get aliasing to work properly with webpack you have to:
Versions
"typescript": "2.8.3",
"webpack": "4.16....
Orms asked 1/8, 2018 at 1:25
1
Solved
Is it possible to create a type alias for auto? I've tried both using var = auto and typedef auto var, and both throw an error that it's not allowed. So is there a way?
Loris asked 16/7, 2020 at 11:43
1
Solved
Consider the following example:
struct A {
using type = int;
};
template <typename T>
using B = A;
template <typename T>
typename B<T>::type f() { return {}; }
template B<i...
Holcman asked 7/7, 2020 at 3:7
1
Solved
new BaseListState<BrandCriteria, Brand>()
This is working and I add
export type BrandListState = BaseListState<BrandCriteria, Brand>;
then
new BrandListState()
This is not allo...
Icecap asked 5/5, 2020 at 7:5
3
Solved
Consider this C++ code :
template<typename Session>
class Step
{
public:
using Session_ptr = boost::shared_ptr<Session>;
protected:
Session_ptr m_session;
public:
inline Step(Sessi...
Cultivation asked 5/9, 2016 at 15:59
1
Solved
Yesterday, I was (pleasantly) surprised when I was able to compile code that had a method which used a using type alias even though the declaration of the alias was not until later in the class def...
Partisan asked 10/2, 2020 at 17:33
2
Let's say I'd like to ensure type safety in Java on primitive types. For the sake of an example, let us want to distinguish a Ratio from an AbsoluteValue, both are represented by a double.
Java to...
Termless asked 30/10, 2019 at 9:26
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