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How to solve a sliding puzzle

When I was 13, I got a 3x3 sliding tile puzzle. Back then, I went to a military-esque boarding school (lolz) with no internet nor TV. It was 1999 in Thailand; the internet wasn't prevalent yet anyway. I had a lot of time in my hand and channeled

I like using a Google Group for recording meeting notes

After leaving Stripe, I've experimented with a few other mediums for recording meeting notes. To name a few, I tried Google Doc, Slack, and paper notebooks. Even at Stripe, I did experiment with those mediums and didn't like them. They often miss one or another aspects

My experience migrating a PlayFramework app to Scala 3

I have a small PlayFramework app (https://superintendent.app) that I just migrated to Scala 3. Here are my learnings: The goods 1. Scala 2 syntax is still valid in Scala 3. Basically, 95% of the code still works as-is. 2. Cross-publishing one of my libraries to work with Scala

One more reason to choose Postgres over MySQL

Almost always, I'd choose Postgres over any database for a new project because it's flexible and support multi-variances of scenarios that may require different performance characteristics. However, I don't generally feel strongly about MySQL vs. Postgres. Either seems fine.... until I've learned

Set up Programmable Tooltip to open Sublime with a specific file

Today I just set up a more complex and powerful use case: I now can select a file path and open the Sublime text to see that file. Occasionally, I'd see a file path in my terminal because it is printed by the program that is running, and

Set up the vim mode in IntelliJ to be aware of CamelCase

I work with Java and Scala quite a lot, and last week I've realized that hey maybe I should set up w and b in vim to jump to the next word in CamelCase. There is this cool vim plugin: https://github.com/chaoren/vim-wordmotion – However, the vim

My secret productivity app when I worked at Stripe

The tool: ProgrammableTooltip.com (disclaimer: I'm the creator) Back in 2019, I just joined Stripe and worked on Billing Analytics. I was working the timezone part of it. Side note: daylight saving is insane. I found myself needing to convert epoch-from-millis to human-readable date extremely often when I

Set up IntelliJ to run scalatest's FunSpec

I finally set up IntelliJ to be able to run a FunSpec test. For so long, I didn't know why it didn't work until I embarked on a short journey to find out. My FunSpec test is often complex with set up code and layers of

The correct way to model a timestamp range is [start, end)

Or things that are not mathematically precise will cause you pain down the line.

Building the load more mechanism for an infinite scroll

Let's set up the problem first. You have a list of posts and you want to show them "infinite-scroll"-style sorting from the newest post to the oldest post. Well, obviously, you can't just load every single post into the page at once. Therefore,