js-ts-csharp

A repository demonstrating functional techniques with C# 10 and the similarities between JavaScript, TypeScript, and C#.

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18Mentions

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158GitHub stars

REPOSITORY AT A GLANCE

What to know before exploring

What it is

A repository demonstrating functional techniques with C# 10 and the similarities between JavaScript, TypeScript, and C#.

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

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This week on Hacker News

Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 10:01:16 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year18 dated mentions

Observed mentions: 2022-03-13 12:38:20 UTC to 2025-02-20 14:18:36 UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

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Period	Start (UTC)	End (exclusive, UTC)	Mentions	Submissions	Comments
2022	2022-01-01 00:00:00 UTC	2023-01-01 00:00:00 UTC	3	1	2
2023	2023-01-01 00:00:00 UTC	2024-01-01 00:00:00 UTC	6	0	6
2024	2024-01-01 00:00:00 UTC	2025-01-01 00:00:00 UTC	5	0	5
2025	2025-01-01 00:00:00 UTC	2026-01-01 00:00:00 UTC	4	0	4

What Hacker News says

4 sources

CharlieDigital·Feb 20, 2025

> The dx typescript brings to these types of applications is nice. Ironically, it only gets halfways there. What I've found is that teams that want TS probably should just move up to C#; they are close enough [0]. The main thing is that once you start to get serious with your backend API, then data integrity matters. TS types disappear at runtime and it's just JS. So you need a Zod or Valibot to validate the incoming data. Then your API starts getting bigger and you want to generate OpenAPI for your frontend. Now your fast and easy Node/Express app is looking a lot like Spring or .NET...without the headway and perf...the irony. [0] https://github.com/CharlieDigital/js-ts-csharp

In Show HN: Mastra – Open-source JS agent framework, by the developers of Gatsby

CharlieDigital·Feb 19, 2025

Kinda disagree on C# It's actually converging with JS and TS Small repo: https://github.com/CharlieDigital/js-ts-csharp Edit: but I don't want to dismiss either because C# does cover a large gamut of use cases (desktop, 3D/gaming, COM interop, etc.) and it is true that in some use cases, you may see a wider range of keyword soup compared to just building web APIs (where I think it really shines; this is a .NET web API in 4 lines: https://imgur.com/a/simple-net-api-with-route-param-validati...).

In One year after switching from Java to Go

CharlieDigital·Feb 1, 2025

> ...no one I know is excited about working with GoF-style OO code these days FYI, this is C#: var namedFunctions = new Dictionary<string, Func<int, int, int>>() { ["multiply"] = (int x, int y) => x * y, ["add"] = (int x, int y) => x + y, ["subtract"] = (int x, int y) => x - y, ["divide"] = (int x, int y) => x / y, }; log(namedFunctions["add"](x, y)); This is also C#: var multiplyN = (int[] numbers) => numbers.Aggregate(1, (a, b) => a * b); var addN = (int[] numbers) => numbers.Aggregate(0, (a, b) => a + b); var subtractN = (int[] numbers) => numbers.Aggregate(0, (a, b) => a - b); var divideN = (int[] numbers) => numbers.Aggregate(1, (a, b) => a / b); log(multiplyN(new[]{1, 2, 3, 4})); log(addN(new[]{1, 2, 3, 4})); log(subtractN(new[]{1, 2, 3, 4})); log(divide

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N(new[]{1, 2, 3, 4})); As is this: // Return a tuple var runCalcsAsTuple = (int[] values) => { return ( multiplyN(values), addN(values), subtractN(values), divideN(values) ); }; // Destructure the tuple var ( multiplyResult, addResult, subtractResult, dividResult ) = runCalcsAsTuple(new [] {2, 3, 4, 5}); Named tuple types are also kinda interesting: using Profile = ( string Username, (string Hn, string Mastodon) Socials ); var profile = GetProfile(); var (hnHandle, mastodonHandle) = profile.Socials; Profile GetProfile() => ("chrlschn", ("CharlieDigital", "@chrlschn")); If you haven't looked at C# in a while, I'd recommend taking a look with a fresh set of eyes. Small repo with examples comparing C# to JS and TS: https://github.com/CharlieDigital/js-ts-csharp

In Why Tracebit is written in C#

CharlieDigital·Jan 29, 2025

> I do think C# is by far the best mainstream language C# is a hugely underrated language that I feel like often gets overlooked when teams look to move beyond JS/TS. The language has a pretty tight syntactic congruency to JS/TS[0], Entity Framework is pretty amazing in terms of DX/perf/maturity, and it seems like we should see more C#/.NET it in the wild than we actually do. My sense is that there are some legitimate reasons to pick something like Kotlin (JVM ecosystem), but a lot of folks that might have worked with C# in passing in the .NET Framework days simply haven't given the ecosystem another look. It's productive, stable, performant, and secure. VS Code support is really good and Rider has a community license available. [0] https://github.com/CharlieDigital/js-ts-csharp

In An update on Dart macros and data serialization