code · words · emotions: Daniel Janus’s blog

Whence this post JEP 401 – a proposal to add value classes to Java – has been crystallizing for almost six years now, but I only learned about it this morning.

Here’s an impressive Show HN project: a comprehensive, reverse-engineered, LLM-written technical documentation of how a calculator’s operating system works.

This is a story of a most unexpected journey — one that is just starting.

I was wrong (or was I?)

’Tis the year’s midnight, and it is the day’s.

I have a love-hate relationship with Datomic.

This is my home-office desk on a typical day.

Let’s talk about Clojure.

What Late last year, I had an idea that’s been steadily brewing in my head.

Intro I’ve been programming in Clojure for a long time, but I haven’t been using transducers much.

My adventure with learning Rust continues.

I’m enjoying a two-month sabbatical this summer.

It’s a tradition of this blog that I write down impressions on my way back from Amsterdam conferences (addendum a week later: unfortunately I took a flight this time, too short to complete this entry, and it had to wait until I caught up).

This post was originally published in Polish.

I bought two computers this year: a beefy Macbook Pro with M1 Pro and a GPD Micro PC.

I’m enjoying a week-long vacation.

Intro Everyone 1 and their dog 2 loves Git.

Before It seems so obvious in hindsight.

In my previous post, “Clojure as a dependency”, I’ve presented the results of some toy research on Clojure version numbers seen in the wild.

I have a shameful confession to make: I have long neglected an open-source library that I maintain, clj-tagsoup.

Indentation matters when reading Clojure code.

Prologue I’ll be releasing version 0.3 of Skyscraper, my Clojure framework for scraping entire sites, in a few days.

This story begins on August 9, 2017, when a friend messaged me on Facebook: “Hey, I’m going to be on a TV talent show this weekend.

In 1960, Ted Nelson envisioned a web of documents.

Intro “But, you know, many explorers liked to go to places that are unusual.

Happy Programmers’ Day, everyone!

Unix Developer: I’m not going to touch Lisp.

While hacking on Lithium, I’ve noticed an interesting thing.

Dust has now mostly settled down on 2048.

Remember Lithium?

Living in London means that I now have a whole lot of new area to explore by cycling or walking.

Ah, the golden days of childhood’s hackage.

tl;dr: Don’t do it.

I’ve moved to London last September.

This has somehow escaped me: just over a year ago, the Sixth Civil Division of the Lublin-West Regional Court in Lublin, Poland, has opened its online branch.

Sequences and iteration There are a number of motivations for this post.

This is a slightly edited translation of an article I first published on my Polish blog on January 19, 2011.

I’ve recently been developing an iPhone application in my spare time.

I keep running into this obstacle every now and then.

It is practically impossible to teach good programming to students that have had a prior exposure to BASIC: as potential programmers they are mentally mutilated beyond hope of regeneration. — Edsger W.

I’ve been quiet on the front of blogging in English recently.

I’ve decided to move my English blog to Posterous.

There’s been an ongoing debate about how to pass optional named arguments to Clojure functions.

The program I’ve been [writing about recently][1] has come to a point where I think it can be shown to the wide public.

Clojure by default protects macro authors from incidentally capturing a local symbol.

I’ve recently done a week-long hike in the Umbria-Marche region of the Italian Apennines (the vicinity of Monte Catria, near Cantiano, to be more precise), and here are some tips I’d like to share.

A couple of weeks ago I finally got around to acquainting myself with [Leiningen][1], one of the most popular build tools for Clojure.

I just needed to convert a big (around 200 MB) text file, encoded in UTF-8 and containing Polish characters, all into lowercase. tr to the rescue, right?

I’ve just taken a short breath off work to put some code on GitHub that I had written over one night some two months ago.

This blog has not seen content updates in more than a year.