kkukshtel • 2 days ago

Modern C# collection expressions make the definition of names closer to F#:

  string[] names = ["Peter", "Julia", "Xi"];
I know working on "natural type" of collections is something the C# team is working on, so it feels possible in the future that you'll be able to do this:

  var names = ["Peter", "Julia", "Xi"];
Which I think would then allow:

  ["Peter", "Julia", "Xi"].Select(name => $"Hello, {name}").ToList().ForEach(greeting =>   Console.WriteLine($"{greeting}! Enjoy your C#"));

1
pjc50 • 2 days ago

I did try that initially and got

    <source>(5,1): error CS9176: There is no target type for the collection expression.
.. which I took to mean that, because .Select is an extension method on IEnumerable, the engine was unable to infer whether the collection should be a list, array, or some other type of collection.

It seems reasonable to have it default to Array if it's ambiguous, maybe there's a downside I'm not aware of.

1 reply
DeathArrow • 1 day ago

Maybe you can submit a proposal/issue to the C# language team? I'd vote for it!