valhalla-docs
csharplang
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valhalla-docs
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Value type companions, encapsulated
What isn't clear for me from https://github.com/openjdk/valhalla-docs/blob/main/site/design-notes/state-of-valhalla/02-object-model.md is whether or not value types will indeed be headerless.
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Devs Sound Off on C# 11 Preview Features Like Parameter Null Checking
Regarding type erasure, see https://github.com/openjdk/valhalla-docs/blob/main/site/design-notes/in-defense-of-erasure.md for a justification. Note in particular that not doing erasure would have forced languages like Scala to follow Java's semantics. In cases where erasure is actually a problem, you can work around it with classes like https://fasterxml.github.io/jackson-core/javadoc/2.2.0/com/fasterxml/jackson/core/type/TypeReference.html.
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6 .NET Myths Dispelled — Celebrating (Almost) 21 Years of .NET
Here's a (relatively recent) post on type erasure from the lead of the value types project at Oracle https://github.com/openjdk/valhalla-docs/blob/main/site/design-notes/in-defense-of-erasure.md
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Background: How We Got the Generics We Have
If you want to read something a little more formal and fleshed out, try scanning through this document, and then come back again and tell me that Brian doesn't understand your suggestion.
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OpenJDK proposals would bring universal generics to Java
Source
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Java 17 / JDK 17: General Availability
I haven't been following it incredibly closely, but I have checked in from time to time. It's a hard problem, but there's a lot of real progress (https://github.com/openjdk/valhalla-docs/blob/main/site/desi...).
I'd wager that it will ship by the next LTS, in 2024.
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JEP draft: Universal Generics (Preview)
Quotes from here
- Simple benchmark of JDK 17 - Valhalla project
- If you could change one thing in the Java and one thing in the JVM, what would you change?
- State of Valhalla, Apr 2021
csharplang
- Discriminated Unions: Essa feature faz falta no CSharp
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DevDocs
Certain parts of Microsoft Learn are permissive, for example the .NET BCL documentation is Creative Commons Attribution: https://github.com/dotnet/dotnet-api-docs as is ASP.NET Core: https://github.com/dotnet/AspNetCore.Docs (a good hint if documentation is permissively licensed and on GitHub is if there's an edit button at the top.)
The C# language specification is unfortunately a bit fuzzier: https://github.com/dotnet/csharplang/discussions/4855
The updated unified C# language specification is CC, but it's still catching up to modern C#: https://github.com/dotnet/csharpstandard
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The golden age of Kotlin and its uncertain future
No OP, but for example you still see the C# folks still struggling to add discriminated unions to the language because of complex interactions due to its too many features[1]. Virtual threads are easier to use than async/await is another example.
[1] https://github.com/dotnet/csharplang/issues/113
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When static types make your code shorter
For example, C# had a research fork called Spec# that had compile-time support for contracts, with keywords such as requires (for arguments) and ensures (for return values), all the way back in 2004. While still being discussed, it doesn't seem to be shipping any time soon.
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.NET 8 – .NET Blog
Hi there. I'm the language designer who created the 'Collection Expression' design/specification: https://github.com/dotnet/csharplang/issues/5354
You can see the entire history of the proposal there. To answer you specific question, we went with `..` because that's what the language already uses for the complimentary 'pattern matching deconstruction' form for collection patterns.
In other words, you can already say this today:
if (x is [var start, .. var middle, .. var end]) { ... }
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What's new in C# 12: overview
You must specify concrete type.
There was a plan to have "natural type" so "var list = [1,2,3]" would be of type "List" but it was postponed to C# 13 (https://github.com/dotnet/csharplang/issues/5354#issuecommen...)
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Robust Design through Value Objects in C#
While C# currently lacks direct support for this kind of functionality, there's a glimmer of hope with an active proposal under discussion that aims to bring this feature to the language. This potential addition promises a future where C# can natively offer similar robust type narrowing.
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The combined power of F# and C#
Given few people anticipated ValueTuple and C# adding a more direct tuple syntax, I feel like it is only a matter of time before C# adds discriminated unions.
(There are multiple proposals tracking the idea. This seems the most comprehensive and "central": https://github.com/dotnet/csharplang/issues/7016)
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Should i quit Django and move to asp.net
I always liked list abbreviations in python, but I absolutely love Linq. I believe there is a feature proposal for C# 12, which makes collection initialization better imo.
- Can constructor parameter assignment be made less verbose?
What are some alternatives?
adoptium.net - Development of the website has moved to https://github.com/adoptium/website-v2
language-ext - C# functional language extensions - a base class library for functional programming
adoptium
jOOQ - jOOQ is the best way to write SQL in Java
loom - https://openjdk.org/projects/loom
SharpLab - .NET language playground
Immutables - Annotation processor to create immutable objects and builders. Feels like Guava's immutable collections but for regular value objects. JSON, Jackson, Gson, JAX-RS integrations included
SQLDelight - SQLDelight - Generates typesafe Kotlin APIs from SQL
amber-docs - https://openjdk.org/projects/amber
runtimelab - This repo is for experimentation and exploring new ideas that may or may not make it into the main dotnet/runtime repo.
MQTTnet - MQTTnet is a high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker). The implementation is based on the documentation from http://mqtt.org/.
.NET Runtime - .NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps.