Abstract Heresies

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, ...

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In my previous post , I gave the puzzle of taking a pattern and generating code that matches it. The tricky part was making sure that the p...

In my previous post , I gave a small pattern matching problem. It is easily solved by recursively descending the pattern and the object to ...