Dear CSCI-316 Students,

No classes are scheduled at the College next
Monday; our next class will be on Wednesday 22nd.
We will ALSO meet for class on Friday of next
week, 10/24, when classes will follow a Monday
schedule; but I will NOT have a 4:45-5:20 office
hour period that day.

However, the main reasons I am sending this email
are:

a) To announce two reading assignments--Reading
   Assignments 1 and 2 below--that you should do
   after submitting Lisp Assignment 3. If
   possible, do these reading assignments before
   our 12th class (10/22, next Wednesday).
   Otherwise, do this reading as soon as possible
   after that class.

b) To provide you with a list of built-in
   functions and other features of Lisp that have
   been covered in class or have been covered in
   earlier reading assignments or are covered in
   Reading Assignments 1 and 2 below. Be sure to
   look over this list, and do so again before
   Exam 1 and before the final exam!

c) To announce that Lisp Assignment 4 is now
   available to you on Brightspace.
     
   You ought to be able to do problems A - G of
   Sec. 1 of Lisp Assignment 4 after doing Reading
   Assignments 1 and 2 below.
   
   You should be able to do the thirteen problems
   in Sec. 2 after doing Reading Assignments 1 and
   2 and attending our 12th and 13th classes on
   Wednesday and Friday of next week. (Some of you
   may be able to do many or even all the problems
   of Sec. 2 after our 12th class next Wednesday.)

Details follow.

(a) Here are two reading assignments you should do
    as soon as possible after you have completed
    Lisp Assignment 3 and also done Reading
    Assignment C in my email of 10/2:

    READING ASSIGNMENT 1: In the course reader,
    read the subsection on LET and LET* on pages
    390 - 91. Note: The square function on p. 391
    is defined at the top of p. 389.

    READING ASSIGNMENT 2: Read the subsections on
    LET and LET* in Touretzky (i.e., secs. 5.5 & 
    5.6 on pp. 141 - 47).

    If you cannot do Reading Assignments 1 and 2
    above before our 12th class (next Wednesday,
    10/22), then do this reading as soon as
    possible after that class.

(b) Assuming you have attended all classes, after
    reading all the pages in Touretzky you were
    asked to read in my previous emails and doing
    the two reading assignments given in (a), you
    should be able to write Lisp code that uses
    any of the following:

      SETF (But SETF must NOT be used in the
        functions you write for Assignments
        3, 4, and 5, and must NOT be used in 
        the functions you write to answer exam
        questions.)         
      DEFUN
      QUOTE or '
      IF, COND
      AND, OR
      LET and LET*
      T and NIL
      The following built-in functions:             
        +, -, *, /, ABS, SQRT         
        CAR and CDR 
        C...R functions (CAAR, CADDR, etc.)
        FIRST, REST, SECOND, THIRD, FOURTH        
        CONS, LIST, APPEND  (Note that, 
          whereas LIST and APPEND can take 
          more than 2 arguments, CONS must 
          be called with just 2 arguments.)       
        LENGTH
        NOT
        NULL
        TYPEP
        NUMBERP, INTEGERP, RATIONALP, FLOATP
        REALP, SYMBOLP, LISTP, CONSP
        ATOM
        EQUAL, EQ, EQL
        =, /=
        <, >, <=, >=
        ZEROP, PLUSP, MINUSP
        EVENP, ODDP
        ENDP
        MEMBER 
    
      Please look over the above list after doing
      the two reading assignments given in (a) and
      check that you are indeed familiar with
      everything that is listed here!

(c) Lisp Assignment 4 is now available to you om 
    Brightspace. 

    You should do the seven problems in Section 1
    of Lisp Assignment 4 (i.e., problems A - G)
    after you have done the two reading
    assignments that are given above in (a). Try
    to have done all of them by the time we meet
    for our 13th class (next Friday, 10/24).

    Try to do all thirteen problems of section 2
    BEFORE OR WITHIN 24 HOURS AFTER our 14th class
    (on Monday, 10/27). Lisp Assignment 5 and
    reading assignments relating to Assignment 5
    will be provided to you no later than 10/29.

When doing the assignments, make sure your code is
written in a functional style. So variables must
be immutable and your functions must not have
side-effects. For example, the functions you write
must NOT use SETF! Moreover, the functions you
write for Lisp Assignment 4 are not expected to
use any features of Lisp other than those listed
in (b) above.

Also make sure the body of each of your function
definitions consists of JUST ONE EXPRESSION: Each
function definition must end with  ... )) where
the 2nd-last ")" matches the "(" that immediately
follows the function's list of formal parameters.

See you in class on Wednesday.

=============================
T. Yung Kong, D.Phil.
Professor
Computer Science Department
Queens College, CUNY
Flushing, NY 11367, U.S.A.