Extracting Path String(s) in Rust
A compilation-ready source for this article can be found here. In Rust, it's fairly straightforward to obtain the path of the running executable, any string passed to the executable, and…
ESP32 NVS Keys Part 2
In a previous post, I investigated the limits to what NVS accepted as a valid ASCII string. While I'm certain I did not iterate over ALL the acceptable possibilities, the…
ESP32 NVS Keys Part 1
This began as a four- or five-question exploration of the Non-volatile storage library for the ESP32. However, the queries, simple at first, grew in depth as I probed their bounds.…
Pascal’s Dynamic Path
There's a dynamic programming interview question which asks how many possible paths exist from one corner of a grid to the opposite corner if one can only move to the…
Fanciful Math
In a prior, previous post, I pondered what the largest possible number could be had from a carry-less multiplication of two 8-bit numbers. In a multiplication featuring carries, the obvious…
Branchless Programming: An Actual Example
Let us recall that any number XORed with 0 is just that number i.e. 5 ^ 0 == 5 resolves to true. Let us also recall that it is foolish…
ESP32 printf()
tl;dr - For the ESP32 microcontrollers, ALWAYS terminate a printf() function call with a newline character. Consider the humble printf("Hello world!\n") statement. This elementary function call is the poor man's…