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Every blog post that took off on Hacker News, ranked by the votes of its best submission. 5,636 posts.

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3992

PyPy.js: First Steps

I've been spending a lot of time in JavaScript land lately. It's not totally unexpected – when I first applied for a job with Mozilla, I was warned only semi-jokingly that "they hire all the best Python programmers and then force them to write JavaScript". I've no deep love or hate for it as a language, but JavaScript…

4002

Allocators in Rust

There has been a lot of discussion lately about Rust’s allocator story, and in particular our relationship to jemalloc. I’ve been trying to catch up, and I wanted to try and summarize my understanding and explain for others what is going on. I am trying to be as factually precise in this post as possible. If you see a…

4005

Write Yourself a Haskell in Lisp

For me, the best way to understand something is usually to implement it myself. So when I first started getting serious about Haskell, I implemented (in Common Lisp) a simple lazy functional programming language that used graph rewriting for the interpretation. Then, years later, I mentioned this implementation in a…

4013

Better Than JSON?

You are seeing this because the administrator of this website has set up Anubis to protect the server against the scourge of AI companies aggressively scraping websites . This can and does cause downtime for the websites, which makes their resources inaccessible for everyone.

4016

Things from Python I'd miss in Go

Let's assume Go has one killer feature – cheap concurrency – not present in any other language with similar serial performance (ruling out say Erlang). And let's agree that it gives Go its perfect niche – and we're only discussing uses of Go outside that niche from now on. So we won't come back to concurrency till the…

4019

Inventing Monads

I got into a discussion about monads recently. On a search to find some resources to share, I realized that most essays explained them with type signatures and rules. A missing ingredient to grok them, I think, is to understand the intuition behind them. How could you end up inventing monads?