[plt-scheme] Scheme sources readability

> As for learning Scheme features, idioms, and ways of
> thinking, a good starting point is HTDP.org.  If you don't work through
> HTDP, one tip I have (which might be controversial) is to learn how to write
> Scheme code without mutations (try not to use things like "set!").  Once
> you've got the hang of that, learn syntactic extension, which leads to a
> higher echelon of programming.

While I learned the Scheme programming language; I knew that I didn't
"get Functional Programming". I mean I know what it means factually,
but I didn't internalize in the same way that I did OO.

As such, I'm studying HTDP.