markyv18 · December 2, 2016 06:35
diff --git a/Eloquent Ruby b/Eloquent Ruby
 #1
 a_bunch_of_numbers = [1,2,3,4,5,6]
 p a_bunch_of_numbers.first
 p a_bunch_of_numbers.last

 #2
 animals = ["dog", "cat", "goat", "capybara"]
 animals_capitalized = animals.map(& :capitalize)
 animals_capitalized.join(", ")

 #3
 BANG! permanently alter the original object
 Adv- no need to build new array with altered types.  Disadv- you've altered the source material.
	#1
	a_bunch_of_numbers = [1,2,3,4,5,6]
	p a_bunch_of_numbers.first
	p a_bunch_of_numbers.last

	#2
	animals = ["dog", "cat", "goat", "capybara"]
	animals_capitalized = animals.map(& :capitalize)
	animals_capitalized.join(", ")

	#3
	BANG! permanently alter the original object
	Adv- no need to build new array with altered types. Disadv- you've altered the source material.