Sorry, can't resist: you probably mean pi radians (and by convention you don't even need the word radians). Pi degrees would imply your outlook barely changed at all.
Yeah this one is so much fun. I feel like I really grew as a programmer from this course. Scheme is the perfect teaching language because each concept being taught can be demonstrated in its pure form so you really “get it”. I had been a professional developer for 10 years or so when I went through this course, and it profoundly changed how I thought about code.
especially the section on streams (https://www.youtube.com/watch?v=JkGKLILLy0I&list=PLE18841CAB...)
It changed my outook on programming by pi degrees and I feel it is more needed then ever.