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VHDL or Verilog?
Blog about VHDL projects for FPGA. FPGA tutorials. FPGA free books.
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High quality graphics for Latex documents: The Matlab route
You use L a T e X instead of a WYSIWYG word processing program because they can’t cope with the high quality required for publication. But your nice professional looking documents can be ruined because you insert the wrong type of figures. Bitmap figures are easily pixelated because the actual size is not always known…
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Real-Time Recognition of Handwritten Chinese Characters
Handwriting recognition is more important than ever given the prevalence of mobile phones, tablets, and wearable gear like smartwatches. The…
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URG
If you asked software engineers some of their “least hated” things, you’ll likely hear both UTF-8 and TCP. TCP, despite being 35 years old, is rock-solid, stable infrastructure that we take for granted today; it’s hard to sometimes realize that TCP was man-made, given how well it’s served us. But within every single…
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Go and Simplicity Debt
Fifteen years ago Python’s GIL wasn’t a big issue. Concurrency was something dismissed as probably unnecessary. What people really was needed was a faster interpreter, after all, who had more than one CPU? But, slowly, as the requirement for concurrency increased, the problems with the GIL increased.
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Basecamp 3 for iOS: Hybrid Architecture
We’ve written quite a bit in the past about our approach to building hybrid mobile apps. Basecamp 3 represents the latest generation of this architecture, taking everything we’ve learned from previ…
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16-bit math look-up tables – the unexpected power of scaled-integer math
Floating-point math puts a big overhead on a computer that doesn't have a floating-point coprocessor; but we really do need floating-point for all but the simplest operations— or do we?? Can we really do things like trig, log, and square-root functions without floating point?
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The nihilist and optimist programmers (2015)
Peter Bourgon has a web site, and this is that web site.
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Cryptographically Secure PHP Development
Your field guide to building secure cryptography features in PHP
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Run the First Edition of Unix with Docker
In this article you'll see how to run a PDP-11 simulator through Docker to interact with Unix as it was back in 1972.
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Growing fibers
wingolog: article: growing fibers
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Databases and Distributed Deadlocks: A FAQ
A developer FAQ created by the Citus engineering team when they first began working on distributed deadlock detection in the Citus database. Explores when PostgreSQL acquires locks, when deadlocks occur, and how Citus detects and prevents distributed deadlocks in Postgres.
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Changes I would make to Go
To highlight exactly how I think Go could be better, I want to make comparisons to Rust.
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Getting Started with Event Sourcing in Postgres
In a previous post we explored how our application tracks sent emails. We set things up to update or insert a record for each email with the current state (delivered, dropped, etc). In this post we'll look at an alternative data model where we'll store each event as its own record and then roll up t
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Chrome OS native development
Native development on a Chromebook, with Chrome OS in Developer Mode
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Nearing the Babel 7.0 Release
Check out Planning for 7.0 for the last updates throughout the 7.0 pre-releases. If something isn't clear in this post let me know!
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Rust Memory Management
In the light of my latest fascination with Rust programming language, I've started to make small presentation about Rust at my office , sinc...
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A Program from a 35 Year Old Magazine for BASIC Month and a Chat with Its Author
July was BASIC Month over at r/Retrobattlestations and for that competition I decided to reach for my TI-99/4A and type in a TI Extended BASIC game called Pearl Harbor from the 1983 issue of Electronic Fun with Computers & Games…for … Continue reading →
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Postgres Job Queues and Failure by MVCC
How Postgres’ concurrency model coupled with long-lived transactions can degrade the performance of indexes on hot tables in your database.
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One-Hour Mandelbrot: Creating a Fractal on the Vintage Xerox Alto
I wrote a short program to generate the Mandelbrot set on the Xerox Alto, a groundbreaking minicomputer from the 1970s. The program, in...
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Project Loom: Fibers and Continuations for the Java Virtual Machine
Project Loom's mission is to make it easier to write, debug, profile and maintain concurrent applications meeting today's requirements. Threads, provided by Java from its first day, are a natural and convenient concurrency construct (putting aside the separate question of communication among threads) which is being…
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Manipulate Functions with the J Language
The Pragmatic Programmer recommends that we learn at least one new language every year. To be effective, the languages we learn should differ sufficiently from those we already master and ideally introduce us to a new paradigm too. Learning a different programming language affects the way we view code. A new paradigm…