I took a look
Admittedly the example usage of pre-post-order is enlightning
As far as I understand racket has no foldts
I wonder if some other scheme could have any more axamples
Like Chicken, for example
Chicken has a skimpy example
I appreciate your concern, thanks ! 😊
No offense taken !
I'm having a hard time in foguring out the "second order traversal" made with pre-post-order
So I'm writing a file with some notes made of svg scraps, and scheme scraps so that I can copy and paste in the REPL to figure things out
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