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Add detailed message to NullPointerException describing what is null
Improve the usability of NullPointerException s generated by the JVM by describing precisely which variable was null .
New
The latest blog posts to take off on Hacker News. 384 posts.
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Local Variables
And as imagination bodies forth The forms of things unknown, the poet’s pen Turns them to shapes and gives to airy nothing A local habitation and a name.
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PyPy v7.1 released; now uses UTF-8 internally for Unicode strings
The PyPy team is proud to release version 7.1.0 of PyPy, which includes two different interpreters: PyPy2.7, which is an interpreter s...
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Why I Switched from Python to Clojure (2016)
I spent some more time with Python and started to realize that I needed something more. Here's a brief list of the reasons why I switched to Clojure.
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On Learning Rust and Go: Migrating Away from Python
I first started using Python in 1993. It's been my main programming language since about 2000. I've written a ton of code in Python, both for work and in my free time. For several years now, I've been growing dissatisfied with it. Partly it's because I'd like more help from my programming tools, such as static type…
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Rust in Production (2018)
How Mozilla’s new language dramatically improved our server-side performance
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The Functional Style (2018)
Functional programming explained for the pragmatic programmer. Part 1. An introduction.
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Programming Language Rankings: January 2019
This iteration of the RedMonk Programming Language Rankings is brought to you by IBM. From Java to Node.js, IBM remains at the forefront of open source innovation. Try our code patterns to help build the future of open source. With the second quarter looming, it’s time for us to drop our first quarter bi-annual…
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Swift UTF-8 String
Swift 5 switches the preferred encoding of strings from UTF-16 to UTF-8 while preserving efficient Objective-C-interoperability. Because the String type abstracts away these low-level concerns, no source-code changes from developers should be necessary*, but it’s worth highlighting some of the benefits this move gives…
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Using Go Modules
An introduction to the basic operations needed to get started with Go modules.
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Lisp Macros, Delayed Evaluation and the Evolution of Smalltalk
At a recent Clojure Berlin Meetup , Veit Heller gave an interesting talk on Macros in Clojure. The meetup was very enjoyable, and the talk...
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Why Operators Are Useful
This is something I posted on python-ideas, but I think it's interesting to a wider audience. There's been a lot of discussion recently ab...
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Writing a simple evaluator and type-checker in Haskell
This tutorial serves as a very short and quick summary of the first few chapters of TAPL. Huge thanks to the ##dependent@freenode community (pgiarrusso, lyxia, mietek, …) for clearing all my …
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What causes Ruby memory bloat?
Ruby apps can use a lot of memory. But why? Various people in the community attribute it to memory fragmentation, and provide two “hacky” solutions. Dissatisfied by the current explanations and provided solutions, I set out on a journey to discover the deeper truth and to find better solutions.
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How we made Haskell search strings as fast as Rust
In this post, we will describe our quest to create Alfred–Margaret, the fastest Haskell implementation of the Aho–Corasick string searching algorithm, which powers string search in Channable.
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Erlang OTP 21.3
The official home of the Erlang Programming Language
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Why I rewrote the mesh generator of Dust3D from Rust to C++
Dust3D is a free, open source low poly 3D modeling tool for video games and 3D printing. Features sketch-to-mesh, auto-rigging, procedural animation, and single-tool GLB/FBX export.
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Compiler Basics: LLVM
Writing a lisp compiler from scratch in JavaScript: 3. LLVM
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Usability Improvements in GCC 9
The upcoming GCC 9 release will have improved diagnostic messages, simpler C++ errors, more accurate error location reporting, and optional machine readable output for developer tools.
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Dreaming of a Parser Generator for Language Design
Trying to design a new programming language, I’m faced with the question of how to implement a parser for it. Various parser generators are available and sup...
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Generating C code that people want to use
Project Everest is a large, collaborative research effort that aims to verify and deploy a new, secure HTTPS stack. All of our code is verified using the F* programming language. Using KreMLin, a dedicated compiler, the verified F* code is compiled to readable C, meaning existing systems projects can readily integrate…
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Building Fast Interpreters in Rust
In the previous post we described the Firewall Rules architecture and how the different components are integrated together. We created a configurable Rust library for writing and executing Wireshark®-like filters in different parts of our stack written in Go, Lua, C, C++ and JavaScript Workers.
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The Kernel Programming Language
I'm developing a programming language called Kernel. Kernel is a conservative, Scheme-like dialect of Lisp in which everything is a first-class object.
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NASM Tutorial (2018)
This tutorial will show you how to write assembly language programs on the x86-64 architecture.
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Implications of Rewriting a Browser Component in Rust
Since our first release in 2002, there have been 69 security bugs in Firefox’s style component. If we'd had a time machine and could have written this component in Rust from the start, 51% wouldn't have happened. That said, Rust is not foolproof. Developers still need to be aware of correctness bugs and data leakage…
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Go 1.12 Released
Go 1.12 adds opt-in TLS 1.3, improved modules, and more.