When I was young I used a chat program developed by occasional HN commenter @krazydad. It had a client-side scripting language called IPTSCRAE (https://en.wikip

When I was young I used a chat program developed by occasional HN commenter @krazydad. It had a client-side scripting language called IPTSCRAE (https://en.wikipedia.org/wiki/IPTSCRAE https://en.wikipedia.org/wiki/IPTSCRAE), with which I could write commands or eventually chatbots with the incantation { ... } CHATSTR "(.*)" GREPSTR IF Since I was about 11 years old, my brain was plastic enough to take the postfix notation in stride, and regular expression syntax is still second nature to me.