I made a new Racket thing today! chief is a port of a subset of foreman‘s functionality to Racket. It lets you run sets of processes together based on a Procfile. If that sounds useful to you, do check it out!

Generators in Python One of the nice things about Python is that it comes with in-built support for “generators”, functions that can suspend themselves and be resumed in the middle of processing. Here’s a generator that produces the fibonacci series: 1 2 3 4 5 6 def fib(): x = 0 y = 1 while True: y, x = x + y, y yield x A generator is instantiated every time you call the fib function.

I had originally shared a version of this post with a small, private mailing list, but then I figured there’d be no harm in sharing it with a larger audience so here it is. My girlfriend and I recently launched matchacha.ro, a small e-commerce site selling Japanese green tea here in Romania (the site defaults to Romanian, but you can change the language by scrolling to the bottom – we don’t ship outside of Romania, though, sorry!

I just released the first version of deta, a Racket library for mapping between database tables and structs. A bit like Elixir’s Ecto.

You can install it from the package server with:

raco pkg install deta

Check it out!

I just released the first version of sentry, a Racket library that lets you capture exceptions using the Sentry API.

Yesterday, I bought an icon pack containing over 3,000 (!) SVG files and macOS utterly failed me when I tried to search the unarchived folder.

So I did what any self-respecting Racketeer would do. I used this as an excuse to play around with Racket’s built-in GUI library!

I just released the first version of marionette (named after the protocol it implements), a Racket library that lets you remotely control the Firefox web browser. Think “puppeteer”, but for Firefox.

Like Alex Harsányi, I’ve been looking for a good, free-as-in-beer, alternative to Travis CI. For now, I’ve settled on GitHub Actions because using them is straightforward and because I saves me from creating yet another account with some other company.

After hacking the matrix.org website today, the attacker opened a series of GitHub issues mentioning the flaws he discovered. In one of those issues, he mentions that “complete compromise could have been avoided if developers were prohibited from using [SSH agent forwarding].”

One of the distinguishing features of Racket’s built-in web-server is that it supports the use of continuations in a web context. This is a feature I’ve only ever seen in Smalltalk’s Seaside before, though Racket’s version is more powerful.