29 Apr 26

Learn mahjong in five minutes. A visual guide for total beginners — tiles, winning hands, wall mechanics, and turn actions.


23 Mar 26

27 Oct 25

A step-by-step guide to building a key-value database from scratch.

by tmfnk 7 months ago saved 4 times

A detailed step-by-step guide for turning rough rocks into beautiful gems with a rotary rock tumbler. Rock Tumbling Is Easy! Using a rock tumbler to convert rough rock into sparkling tumbled stones is easy if you follow a simple procedure and observe a few rules. We are writing this to share the procedure that we have used for many years with a number of rotary tumblers.