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Ask HN: Most interesting tech you built for just yourself?

1901 points l2silver | 2 comments | 27 Apr 23 15:04 UTC | HN request time: 0s | source

Maybe you've created your own AR program for wearables that shows the definition of a word when you highlight it IRL, or you've built a personal calendar app for your family to display on a monitor in the kitchen. Whatever it is, I'd love to hear it.
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firechickenbird ◴[28 Apr 23 08:12 UTC] No.35738778[source]▶
An app that helps me with shopping at my main supermarket.

I usually go always to the same supermarket twice a week. I was frustrated that every time I changed something in my shopping list I had to mentally recompute the optimal path to pick up everything.

Now with my app I am able to build the graph of the entire supermarket (each node represents a rack with shopping items) and then given my shopping list it computes the optimal path from the entrance to the exit. It's a version of the classical travelling salesman problem

replies(1): >>35738878 #
GuusH ◴[28 Apr 23 08:27 UTC] No.35738878[source]▶
Interesting! How did you ingest all the nodes/racks into your system? Did you shave the yak?
replies(1): >>35741324 #
1. firechickenbird ◴[28 Apr 23 13:57 UTC] No.35741324[source]▶
My graph is a partial representation of the supermarket and does not contain all the goods. It has just the stuff that I've bought at least once and manually positioned into the nodes. Sometimes the supermarket decides to relocate groups of goods and I have to update my graph again, but it does not happen too often (they do it probably once or twice a year)
replies(1): >>35783839 #
2. wingtw ◴[02 May 23 05:51 UTC] No.35783839[source]▶
Wow, thats neat! Could you maybe share it? (Hate shopping! And wife tends to always add items in random order to shopping list so it takes ages)