Probably the greatest amount of growth I've had in my lifelong programming journey was during the years when I was working on making my own scripting language.

Probably the greatest amount of growth I've had in my lifelong programming journey was during the years when I was working on making my own scripting language. I think the skills I learned have shaped how I approach other programming project. Think debugging is hard? Try debugging why your script interpreter isn't running a given script correctly.