CSC151 2007S, Class 17: List Iteration Lab

Admin:
* IcePops!
* I have meetings and class nonstop from 8am until 2:30 p.m. today.  I should be in from about 2:45 to about 4:00.
* Are there any more questions on the exam?  (I've added a few to the Q&A section.)
  (+ (rgb.red color) (/ (- (rgb.red color) 256 2)))
  * Check your parens!
  * Check bits of your code first
    * When you get error messages
    * TO make sure it does what you expect
* Why do I get "argument 2 must be a number" (or something similar)?
  * This means: In this place, I expect a number and you're giving me something else
  
* DrFu will start slowly today

Overview:
* Iterating lists of spots.
* Lab!

/Questions/

When I use parameters from one lambda in another lambda, do I have to list
them again.  For example, do I need munge-color in the second lambda?

(define munge
  (lambda (image munge-color)
    (image.map image
               (lambda (color)
                 (rgb.average color munge-color)))))

Not only need you not include the exra parameter, you SHOULD NOT include
that parameter