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How to read a mathematics textbook (2016)
Reading maths textbooks linearly doesn't work; here's what to do instead.
New
The latest blog posts to take off on Hacker News. 4,419 posts.
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Postmortem: Azure DevOps (VSTS) Outage of 4 Sep 2018
Today, we’re happy to introduce Azure DevOps service status portal which helps with real time insights into active service events and provides further details o...
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From VNC to reverse shell
Personal websites are weird. We are mostly past the era of having them, as things like twitter and hosted blog services like Medium have taken them over, but I’m a hold out. I run both my own blog, and have a landing page on the apex domain since the server that hosts the blog (Google App Engine + Cloudflare) is…
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Another Week with Bad Software
In the midst of my September job hop I headed to Kazan for the weekend. I don't know exactly why — probably because I could. I had a hotel booked via booking.com, but once I arrived there the receptionist told me it was the first time he's heard of my booking, and he told me that they had no more rooms, and he told me…
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Mathematical Patterns That Eventually Fail
Sometimes patterns can lead you astray. For example, it’s known that $latex \displaystyle{ \mathrm{li}(x) = \int_0^x \frac{dt}{\ln t} }$ is a good approximation to $latex \pi(x),$ the number …
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MINERVA-II1: Successful image capture, landing on Ryugu and hop
MINERVA-II1: Successful image capture, landing on Ryugu and hop!
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Create QR codes in Excel
Great to create and know the algorithm of QR code... very information! Thanx Bala
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A Programming Language Underdog
As devs in late 2018, we’ve got lots of programming language choices. Mainstream ones alone, there’s about a dozen or so of them. They’re all awesome. As you wander a bit further down the obscurity path, you’ll find languages like elm , elixir , purescript , and reason . And just past those, you’ll find nim .
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New search-by-image method on Bing.com
My brother is a pilot... ... and every so often he sends me a picture from somewhere in the world asking "So, smart guy, where is THIS ...
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Postgres 11 – A First Look
Postgres 11 is almost here, in fact the latest beta shipped today, and it features a lot of exciting improvements. If you want to get the full list of features it is definitely worth checking out the release notes, but for those who don’t read the release notes I put together a run down of some what I consider the…
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Making a racist AI without really trying (2017)
A cautionary tutorial. Let's make a sentiment classifier!¶Sentiment analysis is a very frequently-implemented task in NLP, and it's no surprise. Recognizing whether people are expressing positi
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Functional core, imperative shell (2012)
Purely functional code makes some things easier to understand: because values don't change, you can call functions and know that only their return value matters—they don't change anything outside themselves. But this makes many real-world applications difficult: how do you write to a database, or to the screen? In…
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Inside cpyext: Why emulating CPython C API is so Hard
cpyext is PyPy's subsystem which provides a compatibility layer to compile and run CPython C extensions inside PyPy. Often people ask ...
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What’s the difference between an integer and a pointer?
The Standard does not require that implementations define intptr_t nor uintptr_t. It also does not require that implementations define integer-to-pointer conversions in any meaningful fashion unless they define those types. Conforming implementations are certainly allowed to document some integer-to-pointer…
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NewSQL databases fail to guarantee consistency and I blame Spanner
(Spanner vs. Calvin, Part 2) [TL;DR I wrote a post in 2017 that discussed Spanner vs. Calvin that focused on performance differences. Th...
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Deep learning experiments in OCaml
Last year we held a machine learning seminar in our London office, which was an opportunity to reproduce some classical deep learning results with a nice twi...
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Marzipan: Porting iOS Apps to the Mac
With macOS Mojave, Apple is adding support to bring apps written in UIKit to macOS without the requirement of having to rewrite the UI in AppKit. This is not yet officially supported — this post will explore what we can expect in 2019 and how you can use Marzipan today.
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The DeWitt Clause: Why You Rarely See Database Benchmarks
Back in the early 1980s, Dr. David DeWitt – who you might know from past PASS Summit keynotes, formerly of Microsoft (LinkedIn) – was working on measuring database performance. His team wrote a benchmark, ran it against Oracle, and Oracle didn’t fare well in the results. Oracle reacted as one would expect – they were…
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Worst Puzzle Ever (2009)
It breaks my heart to write this post because the puzzle in question was 1) very expensive and 2) given to me by someone very dear to me who...
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Thanks for the Surprise Integration with My Website, Apple
Addicted To Programming - @asaph's blog
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Qualcomm’s Chain of Trust
Covering Qualcomm bootloader’s up to the point of Android being loaded
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A Day in the Life of Americans
I wanted to see how daily patterns emerge at the individual level and how a person’s entire day plays out. So I simulated 1,000 of them.
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Hands on with Linkerd 2.0
Linkerd 2.0 was recently announced as generally available (GA), signaling its readiness for production use. In this tutorial, we’ll walk you through how to get Linkerd 2.0 up and running on your Kubernetes cluster in a matter seconds. But first, what is Linkerd and why should you care? Linkerd is a service sidecar…