Abstract Heresies

Arcane Sentiment mentioned how the Lisp Machine used to handle package prefixes in this post , and it reminded me of an interesting problem...

Write a procedure that, given two integers L and R, produces the integer that results from interleaving the binary representation of L and R...

You have a list of names and a list of objects. Each object has 1 unique name. Neither list contains duplicates. Write a procedure that d...

I was asked: In your opinion, from a Google perspective, what qualities make up a great CTO? I'm not sure what a “Google perspective” i...

Here's my solution: (define (all-descendants node-children root) (cons root (append-map (lambda (child) ...

Given a procedure that returns a list of the children of a given node of a tree, write a procedure that returns a list of all the descendant...

I recently received an email asking me, “ Do you know of any good books about developing software or thinking in abstraction? I have books, ...