I saw a toot celebrating a short, clean implementation of a square root finding algorithm and wanted to dig a bit deeper into how it works, with a diversion into some APL. This was the toot from Jim Gardner Doubly pleased with myself. Been doing the Tour of Go. Got to the section where you make a square root function, which should return once the calculated value stops changing. Struggled for ages. Trimmed and trimmed. Until finally… this! The calculation for z was given, and I don’t unde...
