My name is slnt_opp, I'm just yet another Developer, who has domain and maybe some words to tell you. Here you can find some articles written by me. And if I'll publish any projects, they will also appear here. So, you can find my contacts and blog posts down.
The Android emulator and a pile of Gradle builds took my Mac down with them, so Halfword’s Android screens are drawn on the JVM instead: Robolectric starts the real app, Roborazzi saves the pictures, 456 of them in four languages in 2 minutes 19 seconds. How it works, what it caught, and what it can’t tell you.
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Halfword is the word game Undercover for one phone passed round the table: pixel art, eight special roles, and points that add up over a whole evening. It is out for iPhone and Android. Here is what building it took: points balanced by simulation, one Swift codebase for two platforms, an engine that can replay any game, pixel art without image files, and screens drawn before they were coded.
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Fare Enough turns an iPhone into a taxi meter: real city tariffs, a glowing old-school meter when you turn the phone on its side, and receipts that print on a pocket thermal printer. Here is what building it taught me about Skip, background location and Bluetooth printers.
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Eighteen months of drawing our map as pictures, and why Cuando is moving to vector: one 58.67 MB file instead of 15 GB per theme, a Flutter renderer that crashed, and three map engines behind one view in the new apps.
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Today, bus routes in Cuando started coming from Valhalla, fed with a GTFS timetable we generate ourselves. We have been publishing it, or trying to, every weekday since March, and until today nothing asked it for a bus. How to make GTFS when nobody publishes one, and how Valhalla loses every bus while every check stays green.
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For a year, route search in Cuando was one recursive SQL query. This autumn the app started calling it, and it started running out of memory. How route search in SQL works, why it blows up, and why, as of today, it runs in the Worker instead.
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