Class 20 Objectives

At the end of today's class you should

KNOW:

That functions are values and can be passed as arguments to other functions
That filter can be used whenever you want to extract elements from a list according to some predicate
That filter provides a compact way to write certain functions over lists

BE ABLE TO:

Use filter to write functions over lists.

Sample Exam Question:

A database of college students staying in residence halls is made up of a list of structs with the following format:

;; a Student is a (make-student String Symbol Number String)
(define-struct student(name gender age id))

Using filter, write a function list-all-females that consumes a ListOfStudent and produces a ListOfStudent. The list that is produced contains only the female students.