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Lisp is not based on the Lambda Calculus
How do you condense a 30 minute talk in 5 minutes? Should you even try? These are the questions I struggled with when someone nudged me to register for the lightning talks. My talk was 30 minute long because I was to jump in if a last-minute incident would prevent someone to get on stage. Call me the backup speaker…
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Roll Your Own Analytics
How to build a free, privacy-focused alternative to Google Analytics
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What Is a Manifold?
In machine learning, the term manifold is thrown around a lot—in fact, there’s even a branch of machine learning dealing with learning the structure of manifolds. Said branch is aptly named manifold learning . Inspired by fantastic visualizations of shapelet mining algorithms , this post aims to give a visual…
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C++ 20: The Core Language
My last post C++20: The Big Four started with an overview of concepts, ranges, coroutines, and modules. Of course, C++20 has more to offer. Today, let’s continue my overview of the core language.
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Verb-Noun vs. Noun-Verb
Behind the scenes - how I'm making redblobgames.com - interactive explanations of game development algorithms and math
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How I Could Have Hacked Any Instagram Account
This article is about how I found a vulnerability on Instagram that allowed me to hack any Instagram account without consent permission. Facebook and Instagram security team fixed the issue and rewarded me $30000 as a part of their bounty program. Facebook is working constantly to improve its security controls on all…
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Developing for Android is like being a demonetized YouTuber
Many are aware that some YouTubers are unhappy with how YouTube operates. But are you aware that Android app developers go through similar struggles with Google Play? Let me try and explain everything that's wrong with Android in a single 20 minutes read.
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It’s Time for Some Queueing Theory
Queueing theory is the scientific study of waiting in line. It can apply to familiar lines like those at the grocery store or bank but also to things like web s
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Apple Is Listening
They had encountered significant turbulence in the product line over the preceding years, especially Macs. It was a rough time to be a pro Mac user.
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Google to Reimplement Curl in Libcrurl
Not the entire thing, just "a subset". It's not stated very clearly exactly what that subset is but the easy interface is mentioned in the Chrome bug about this project. What? The Chromium bug states that they will create a library of their own (named libcrurl) that will offer (parts of) the libcurl API and … Continue…
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Why Language-Oriented Programming? Why Racket?
Beautiful Racket
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An Introduction to Recurrent Neural Networks
A simple walkthrough of what RNNs are, how they work, and how to build one from scratch in Python.
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Racket Is an Acceptable Python
A little over a decade ago, there were some popular blogposts about whether Ruby was an acceptable Lisp or whether even Lisp was an acceptable Lisp . Peter Norvig was also writing at the time introducing Python to Lisp programmers . Lisp, those in the know knew, was the right thing to strive for, and yet seemed…
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Mail Data Loss in macOS 10.15
I’m working on more posts about the Catalina release, but I wanted to start with a short warning. I’ve heard a bunch of reports of data loss in Apple Mail. Thankfully, none seem to be caused by my apps . (Ironically, one of the bugs I’ve encountered is the inability to delete messages via AppleScript.) And, in fact…
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Intermediate Vim
A few tips to level up your vim editing skills from beginner to intermediate.
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CSS Utility Classes and “Separation of Concerns” (2017)
Over the last several years, the way I write CSS has transitioned from a "semantic" approach to something more like what people call "functional CSS." In this post I explain how I got to this point and share some of the lessons and insights I've picked up along the way.
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Killing a process and all of its descendants
Killing processes in a Unix-like system can be trickier than expected. Last week I was debugging an odd issue related to job stopping on Semaphore. More specifically, an issue related to the killing of a running process in a job.
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The Danger of “Simplicity”
Opinions and discussions of various topics, mostly related to programming.
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Writing a game engine in pure C: The Graphic Initialization
If you haven’t read the other posts, go now: Part 1: the state manager Part 2: the graphic initialization Part 3: the engine entity We have a state manager now but a game without graphic re…
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Fixing a Small Calc.exe Bug
tldr; saw a Windows Calculator bug on reddit . Since calc.exe was open-sourced I thought I’d try to find the bug and fix it. Cloned the code, recreated the bug, and found a minimal fix .
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Senior Developers Are Getting Rejected for Jobs
Some really great software developers have been passed...
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AWS Elasticsearch: a fundamentally-flawed offering
I'm currently working on a logging project that was initially implemented using AWS Elasticsearch. Having worked with large-scale mainline Elasticsearch clusters for several years, I'm absolutely stunned at how poor Amazon's implementation is and I can't fathom why they're unable to fix or at least improve it. I…