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Ruby
Week 3
HOmeWOrk REview

Walk Through Simon Says
Questions Should be Answered in Class
Git / Github Review Sheet
Collections
Array


Ordered List
Referenced by Order(index)
Hash


Key, Value Store
Referenced by Name(key)
Array and Hash Exercise

numbers = [5,4,7,1,3,2,6]
numbers[0]
numbers.size
more_numbers = {โ€œoneโ€ => 1, โ€œtwoโ€ => 2, 3 => โ€œthreeโ€}
more_numbers[โ€œoneโ€]
Modules

Sharing Behavior
Namespacing
DRY Code
Composition
Enumerable

Module for Collection Speci๏ฌc Actions
Search
Sort
Iterate (Enumerate)
Demo Enumerable
load โ€˜monsters.rbโ€™
$monsters


How many monsters are nocturnal?
What are the names of the monsters that are nocturnal?
How many legs do all our monsters have?
What are the 2 most common dangers and vulnerabilities of our monsters?
Module Exercise

named_thing.rb
Vampireโ€™s have names
Humanโ€™s have names
Inheritance


Parent-Child
SubTypes
Inheritance Exercise

monster.rb
Monster
   Vampire (vampire.rb)
   Zombie
   Werewolf
Numbers

FixNum
1 is always 1! (unlike strings)
Floats (BigDecimal)
4.2
3.141516
Ranges

1..5
1...5
a..z
HomeWork


Reading in questions.txt
calculator_spec.rb

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Week3

Editor's Notes

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