Today's summary and new assignment for Friday May 3rd

[reborgml]

Greetings FP-iers,

great energy and discussions at today's SICP book club. You can definitely tell there's a lot of math involved from this pic:

 Here's a little summary:

- There are fixed point values of a function but not only. There are also fixed point functions of other functions as well! Take (lambda (y) (/ x y)) for example: this lambda returns a partial function of one argument that when invoked perform x divided by the argument you pass in. Well, the fixed point of this lambda given x is the square root of x!

- the average damping is another function that returns a function. It gives you back a function that is the average of the value and the function invoked over that value. As Anthony noted, we are very closed to the "decorators" of the OOP world. Indeed.

- Tried some example of the above at the Dr.Racket repl

NEXT Friday:

- Whooo! We crossed the chapter #1 boundary!

- Chap 2 intro, 2.1.1 and 2.1.2 plus exercises 2.2 and 2.3

We are very close to list operations, cdr car head and tail and friends.

Cheers

Renzo