52 questions
0
votes
0
answers
32
views
Pass `string[][]` as `InlineData to xUnit Theory? [duplicate]
In an xUnit theory I'd like to send an InlineData parameter of type string[][]. I can't seem to get it right. Is it doable, and if so, how?
I would expect this to work at least:
[InlineData(new string[...
- 1,623
1
vote
0
answers
51
views
CS0121 Ambiguous Call with Collection Initializer [duplicate]
I'm on a team with two other devs. For the past few months I've been working on a project in C# 12 independently, and only recently have the other devs pulled my code and run it. For one of them it ...
- 73
3
votes
1
answer
588
views
ImmutableArray empty collection initializer is not equal to ImmutableArray.Empty in C# 12
It appears that C# 12's collection initializers don't produce the same result as a ImmutableArray's Empty property; for example:
using System;
using System.Collections.Immutable;
...
- 42.8k
2
votes
2
answers
2k
views
What's the syntax for using C#12 collection expressions to initialise a List<List>>?
Say I have code like this (or any kind of jagged structure):
var intListList = new List<List<int>> {
new() { 1, 2, 3 }
};
I'd like to use a collection expression here. Resharper (EAP) ...
- 73.6k
30
votes
2
answers
2k
views
What does assignment to a bracketed expression mean in C#?
I'm reading Avalonia source code and I came across this sentence:
return new MenuFlyoutPresenter
{
[!ItemsControl.ItemsProperty] = this[!ItemsProperty],
[!ItemsControl.ItemTemplateProperty] = ...
1
vote
2
answers
663
views
Supporting collection initialization syntax for immutable collections - init modifiers for methods?
I need to implement an immutable collection which supports collection initialization syntax. The problem is in order to support collection initialization syntax, the collection must provide ...
1
vote
2
answers
70
views
Set inner object's member as outer object using the object initialization syntax in C#
Context
I have a List<T> of type Question.
Class Question, in turn, contains a List<Answer>.
Class Answer has a member called public Question Question { get; set; } which stores the ...
- 4,988
1
vote
2
answers
339
views
Why is a collection initializer without `new` allowed inside an object initializer but not outside?
I noticed strange behaviour when initializing collection property.
Consider:
class X
{
public IList<int> Ints { get; set; }
}
I can initialize Ints like that:
var theObject = new X
{
...
- 624
2
votes
1
answer
573
views
Collection initializers inside object initializers with default values
I just stumbled upon the following issue:
class Settings
{
// Let's set some default value: { 1 }
public ICollection<int> AllowedIds = new List<int>() { 1 };
}
static void Main(...
- 173k
1
vote
1
answer
829
views
Use of C# 8 null-forgiving operator within C# 6 index initializers
When using an index initializer to fill a dictionary without recreating it before that, is there an option to specify the null-forgiving operator somewhere?
Example:
public class Program
{
...
- 2,190
1
vote
2
answers
144
views
Can't dynamically set array initializer length
I am using C# to hook into the FedEx API and I'm a bit stumped on how to modify some existing code to meet my needs. The snippet included is part of their canned code where they sample how to work ...
- 218
0
votes
2
answers
2k
views
Initializing a list of lambda expressions
I'm designing a state machine class and want to use lambda expressions to represent conditions to satisfy the state transition objects. When I create a new State Transition object, I also want to pass ...
- 833
10
votes
4
answers
6k
views
Initialize elements with brackets like Lists in c#
I was thinking about arrays and lists and wondering if and how classes can get an implementation to be initializable like them. Let's take this class as basis:
class TestClass
{
private List<...
- 826
7
votes
1
answer
1k
views
C# List or Collection initializer using foreach loop
Is it possible in C# to do something similar to the following?
var tigerlist = new List<Tigers>(){ Tail = 10, Teeth = 20 };
var tigers_to_cats_approximation = new List<Cat>()
{
...
- 1,425
3
votes
3
answers
506
views
C# Collection initialization syntax for use with custom matrix class?
I'm creating a custom matrix class that only has a single 2D array to hold everything (I know that a 1D array is faster and better, but that's not the point of this implementation) the thing is, I'd ...
- 57