Homework

We will publish four homework assignments on BRUTE for 50 points in total:

Assignment	Language	Opening	Deadline	Points
ASCII Art	Racket	05.03.	25.03.	10
SVGen Interpreter	Racket	19.03.	08.04.	15
λ-Calculus Evaluator	Haskell	09.04.	02.05.	12
Parser of λ-Programs	Haskell	30.04.	20.05.	13

Requirements

To pass, you must earn a minimum of 25 points in total and score at least one point from each homework assignment. There is a penalty of one point for each day a homework assignment is submitted after the deadline, with deductions continuing until only one point remains available for late submissions.

Keep in mind our academic principles: avoid plagiarism, do not share code snippets directly, and try to come up with a solution by yourself first.

Note on the private test data

A part of any programming assignment is generating test cases and testing the produced algorithm. It is a very important skill each programmer has to master, regardless of the programming paradigm. Please, take the result of the automatic evaluation as a hint that you should continue this process. Do not ask for the private test data and do not ask what is wrong with your output in the evaluation system. In the real world, no one will give you even this feedback and if you release a product with serious mistakes, you will suffer losses in money and reputation.

However, if you spend a long time (at least 4 hours) without any progress and you have created a decent set of your own test cases that pass without problems - I encourage you to write to your lab teachers to help you design additional test cases or possibly help to identify the mistakes in your code.

For writing your test cases, you can use the unit testing framework provided by Racket. To write unit tests, it suffices to import the rackunit module into your code. Then it is possible to test your functions by the function ''check-equal?'' comparing the expected output with the actual output. Consult also your local documentation in DrRacket to get more details on rackunit.

#lang racket
(module+ test
  (require rackunit))

(define (only-numbers lst) (filter number? lst))

(module+ test
  (check-equal? (only-numbers '(1 a 2 3)) '(1 2) "You made an error!"))