Exercises from Chapter 8
Building and Sorting an Array
How you could do it:
puts 'Give me some words, and I will sort them:' |
words = [] |
|
while true |
word = gets.chomp |
if word == '' |
break |
end |
|
words.push word |
end |
|
puts 'Sweet! Here they are, sorted:' |
puts words.sort |
| <= | Give me some words, and I will sort them: |
| => | banana |
| => | apple |
| => | cherry |
| => | |
| <= | Sweet! Here they are, sorted: |
| | apple |
| | banana |
| | cherry |
How I would do it:
puts 'Give me some words, and I will sort them:' |
words = [] |
|
while true |
word = gets.chomp |
break if word.empty? |
|
words << word |
end |
|
puts 'Sweet! Here they are, sorted:' |
puts words.sort |
| <= | Give me some words, and I will sort them: |
| => | banana |
| => | apple |
| => | cherry |
| => | |
| <= | Sweet! Here they are, sorted: |
| | apple |
| | banana |
| | cherry |
Table of Contents, Revisited
How you could do it:
title = 'Table of Contents' |
|
chapters = [['Getting Started', 1], |
['Numbers', 9], |
['Letters', 13]] |
|
puts title.center(50) |
puts |
|
chap_num = 1 |
|
chapters.each do |chap| |
name = chap[0] |
page = chap[1] |
|
beginning = 'Chapter ' + chap_num.to_s + ': ' + name |
ending = 'page ' + page.to_s |
|
puts beginning.ljust(30) + ending.rjust(20) |
chap_num = chap_num + 1 |
end |
Table of Contents |
|
Chapter 1: Getting Started page 1 |
Chapter 2: Numbers page 9 |
Chapter 3: Letters page 13 |
How I would do it:
title = 'Table of Contents' |
|
chapters = [['Getting Started', 1], |
['Numbers', 9], |
['Letters', 13]] |
|
puts title.center(50) |
puts |
chapters.each_with_index do |chap, idx| |
name, page = chap |
chap_num = idx + 1 |
|
beginning = "Chapter #{chap_num}: #{name}" |
ending = "page #{page}" |
|
puts beginning.ljust(30) + ending.rjust(20) |
end |
Table of Contents |
|
Chapter 1: Getting Started page 1 |
Chapter 2: Numbers page 9 |
Chapter 3: Letters page 13 |
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