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December 2, 2016 06:35
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Eloquent Ruby
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| #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. |
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