Foundations of Computer Science
& Numerical Methods 17-18

Additional Resources

• Theory & Exercises by M. Ragni
• Google Classroom (code in slides)

Lessons

1. [20180222] Bash & Intro to Ruby (.rb, puts, '', "") PDF
2. [20180226]
   Topics:
   
   • String interpolation.
   • Mathematical operators (and int vs float).
   • A gentle introduction to the math library.
   • The first function (with hints on scopes).
   • Variables (with hints on scopes).
   • Bash input - output.
   This executable ruby script contains, in the form of comments, the theory saw in class alongside some examples. Note: the file has extension ".txt" only to allow reading it from the browser.
3. [20180305]
   Topics:
   
   • Recap on math operators.
   • Boolean variables and expressions.
   • Conditional execution.
   • Input from the user.
   • Range
   This executable ruby script contains, in the form of comments, the theory saw in class alongside some examples. Note: the file has extension ".txt" only to allow reading it from the browser.
4. [20180312]
   Topics:
   
   • Loops, break, next.
   • Example: Method of Exhaustion for the Area of the Circle PDF.
   • Recursive function.
   • Example: Factorial.
   • Exercise: "Move O around" (solution next lesson).
   This executable ruby script contains, in the form of comments, the theory saw in class alongside some examples. Note: the file has extension ".txt" only to allow reading it from the browser.
5. [20180319]
   Topics:
   
   • Example: "Move O around" - (solution).
   • Array - doc.
   • Example: "Screen via Array" - (code).
   • OOP: class, instance, method, instance's variable, initialize.
   • Example: "Screen as class" - (code).
6. [20180322]
   Topics:
   
   • Lambda functions: ruby-doc, summary, (code).
   • Blocks: (code).
   • Errors, raise, rescue, retry, ensure - (code).
7. [20180326]
   Topics:
   
   • OOP Recap; Encapsulation; Inheritance; Polymorphism - (pdf).
   • Classes: Object, Numeric, Array, Strings, Hash, File - (doc).
   • Exercise 1: Read numbers from a file and sort them - (solution).
   • Exercise 2: Read numbers from a file and count occurrences.
8. [20180409]
   Topics:
   
   • Solution to 0326 exercise 2 - (solution).
   • Sorting (<0, 0, >0). Note: 0 is True in Ruby.
   • Methods and attributes visibility: public, protected, private.
   • Introduction to attributes accessibility: getter & setter.
   • Enumerable mixin.
   • Design of our Matrix class.
9. [20180416]
   Topics:
   
   • Attributes accessibility: getter & setter - (examples)
   • Matrix implementation draft
   • Assignment: Write tests (simple code that uses the class features) and debug it - (broken_matrix).
10. [20180423]
    Topics:
    
    • How to debug
    • Matrix debugging and test - (fixed_matrix).
11. [20180507]
    Topics:
    
    • [Exercise] Operations on vectors - (max(even), min(odd)).
    • [Exercise] Operations on vectors - (local minima).
    • [Revision] Hash (a.k.a dict).
    • Introduction to bubble-sort.
12. [20180514]
    Topics:
    
    • Bubble sort - (source).
    • Binary search - (source).
13. [20180521]
    Topics:
    
    • Campionato - (source).
    • Newton - (source).
    • Halley - (source).
    • [Revision] Hash, File, Blocks.
    • [Funny] What happens when you forget to cast - JDK 7.67 installer on OSx 10.10 - String vs Numeric comparison.
14. [20180528]
    Topics:
    
    • Exam simulation.

Mails

When contacting me, please use an appropriate subject like '[CNUM 1718] ...' and, before sending in your questions, double check for the answers not to be already in the Google Classroom.