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The Halting Problem is a terrible example of NP-Harder
It's a justifiable copout, but it's still a copout.
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 14,546 posts.
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`std::flip`
std::flip is a little-known utility from the C++ standard library header <functional>: it is a higher-order function that accepts a Callable and returns an equivalent Callable with the order of its parameters reversed (or “flipped”).
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Contracts for C
C++ seems to finally converge with their contracts proposal, I decided to give it a try and come up with ideas how such a thing would look for C. This is in early stages, not a full proposal yet, a…
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Vim Language, Motions, and Modes Explained (2023)
Vim is a powerful text editor that improves coding speed & efficiency through its shortcut-based Vim language. While learning Vim can be challenging, it is a valuable skill that can enhance your career as a computer professional.
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Personal software factories are a waste of time
Why the last thing you should spend time on is your own software factory.
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In CPython, types implemented in C are part of the type tree
You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace , the wiki thing it's part of. Unfortunately you're using a browser version that my anti-crawler precautions consider suspicious, most often because it's too old (most often this applies to versions…
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Performance Analysis of Python's Dict() and {}
Some time ago, during a code review, I had a discussion with a colleague of mine about preferring dict() over {} in new Python code. They argued that dict() is more readable — and expresses intent more clearly — therefore should be preferred. I wasn’t convinced by that, but at that time I didn’t have any…
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Don't Learn to Code, Learn to Program – But Come Back in 10 Years
I want to discuss why programming and coding are not the same, and why I can no longer support the Learn to Code movement. I can no longer tell my friends to learn coding. Although I’m passionate about it, it’s too arcane and insular for mainstream practice.
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Compile-time JSON deserialization in C++
(Discussion on HackerNews)
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When would you ever want bubblesort? (2023)
There are very few universal rules in software engineering, but there are are a lot of near-universal principles. Things like "prefer composition to...
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Everything about Google Translate crashing React (and other web apps)
A deep dive into Google Translate (and other browser extensions) interference breaking React and other web apps.
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Ligatures in programming fonts
Create beautiful emails, automate campaigns, and track performance. Try it now and see how our tools can drive your business.
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We memo all the things (2020)
On my team at Coinbase, we ask everyone to use the React performance trinity – memo, useMemo, and useCallback – all the time. For some reason, this is controversial. I’m guessing this has something to do with Twitter. This article explains why we do it anyway.
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Iterating Backwards in C
This is shorter than some of my other posts, but I keep seeing people doing this wrong. It's even worse now in the LLM era.
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The Four Flaws of Haskell
Summary: Last year I made a list of four flaws with Haskell. Most have improved significantly over the last year. No language/compiler ecosy...
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How Does Claude 4 Think? – Sholto Douglas and Trenton Bricken
Scaling reinforcement learning, tracing circuits, and the path to fully autonomous agents
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Moving Beyond the OOP Obsession
It's not about technology for its own sake. It's about being able to implement your ideas.
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I Hate Git Submodules
Abildskov.io
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Why I'm declining your AI generated MR
Sometimes a merge request (MR) doesn't merit a code review (CR) because AI was used in a bad way that harms the team or the project. For example:
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Writing a DSL in Lua (2015)
DSLs, or domain specific languages, are programming languages that are designed to implement a set of features specific to a particular problem or field. An example could be Make , the build tool, which is a specially designed language for combining ...
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Why I don't do Domain Driven Design (2018)
Why I don't do Domain Driven Design
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SQL vs. NoSQL Is the Wrong Distinction
A misconception that I held for a really long time was that systems that use SQL (Structured Query Language) are by definition relational databases, and systems that don’t (e.g., MongoDB, Cassandra) are non-relational. It’s easy to understand whether a database uses SQL or not, but what does it mean when we say a…
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Flowchart: How should I run containers on AWS?
As of Late 2021, which AWS service should I use to run my new containerized app in production?
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What is Programmer Anarchy and does it have a future?
A developer I know recently told me that he wasn’t interested in any new opportunities in the short term because his team were about to adopt Fred George’s post-agile concept of Programmer Anarchy…
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I've finally implemented the command I keep typing all day: gti
I've finally implemented the command I keep typing all day: gti. It's a program that displays a badly made ASCII-art animation to punish you for your typing error - and after that magically launches the command you meant to launch. The code is available under an MIT-like license on github - though of course anybody…
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