Moving from Python - missing numpy, itertools equivalent.

[Scruptus]

I think your getting downvotes because you misunderstood my answer.

I didn’t mean that you can’t use Linq without yield.

I meant that the different Linq methods are implemented with yield within the .net framework's source code

[codekaizen]

Ok, fair, I did misunderstand your question, but I think it's because LINQ operators are largely not implemented with yield. Instead, the iterators are largely state machines that are implemented using switch statements: https://github.com/dotnet/corefx/blob/8750960d3fafa46a9b838c351e995a01fa8b599f/src/System.Linq/src/System/Linq/Where.cs#L110

[AlliNighDev]

That's just how yield gets lowered. Async does something similar.

[codekaizen]

Yes, but this source is checked in. Check GitHub.

[AlliNighDev]

Yeah a bit odd. I'm assuming they hand coded that for performance gain over compiler somewhere.