code snippets for Lecture 7

These are also hyperlinked from the pdf if your reader is set up right (tested with evince, mupdf / emacs-pdftools, on Linux).

o-self-no.rkt

o-self-no2.rkt

o-self.rkt

tree-size.rkt

tree-sum.rkt

tree-sum2.rkt

tree-sum3.rkt