Exercises from Chapter 7
“99 Bottles of Beer on the Wall”
How you could do it:
num_at_start = 5 |
|
num_now = num_at_start |
|
while num_now > 2 |
puts num_now.to_s + ' bottles of beer on the wall, ' + |
num_now.to_s + ' bottles of beer!' |
num_now = num_now - 1 |
|
puts 'Take one down, pass it around, ' + |
num_now.to_s + ' bottles of beer on the wall!' |
end |
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puts "2 bottles of beer on the wall, 2 bottles of beer!" |
puts "Take one down, pass it around, 1 bottle of beer on the wall!" |
puts "1 bottle of beer on the wall, 1 bottle of beer!" |
puts "Take one down, pass it around, no more bottles of beer on the wall!" |
5 bottles of beer on the wall, 5 bottles of beer! |
Take one down, pass it around, 4 bottles of beer on the wall! |
4 bottles of beer on the wall, 4 bottles of beer! |
Take one down, pass it around, 3 bottles of beer on the wall! |
3 bottles of beer on the wall, 3 bottles of beer! |
Take one down, pass it around, 2 bottles of beer on the wall! |
2 bottles of beer on the wall, 2 bottles of beer! |
Take one down, pass it around, 1 bottle of beer on the wall! |
1 bottle of beer on the wall, 1 bottle of beer! |
Take one down, pass it around, no more bottles of beer on the wall! |
How I would do it:
num_at_start = 5 |
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num_bot = proc { |n| "#{n} bottle#{n == 1 ? '' : 's'}" } |
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num_at_start.downto(2) do |num| |
puts "#{num_bot[num]} of beer on the wall, #{num_bot[num]} of beer!" |
puts "Take one down, pass it around, #{num_bot[num-1]} of beer on the wall!" |
end |
|
puts "#{num_bot[1]} of beer on the wall, #{num_bot[1]} of beer!" |
puts "Take one down, pass it around, no more bottles of beer on the wall!" |
5 bottles of beer on the wall, 5 bottles of beer! |
Take one down, pass it around, 4 bottles of beer on the wall! |
4 bottles of beer on the wall, 4 bottles of beer! |
Take one down, pass it around, 3 bottles of beer on the wall! |
3 bottles of beer on the wall, 3 bottles of beer! |
Take one down, pass it around, 2 bottles of beer on the wall! |
2 bottles of beer on the wall, 2 bottles of beer! |
Take one down, pass it around, 1 bottle of beer on the wall! |
1 bottle of beer on the wall, 1 bottle of beer! |
Take one down, pass it around, no more bottles of beer on the wall! |
Deaf Grandma
How you could do it:
puts 'HEY THERE, SONNY! GIVE GRANDMA A KISS!' |
|
while true |
said = gets.chomp |
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if said == "BYE" |
puts 'BYE SWEETIE!' |
break |
end |
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if said != said.upcase |
puts 'HUH?! SPEAK UP, SONNY!' |
else |
random_year = 1930 + rand(21) |
puts 'NO, NOT SINCE ' + random_year.to_s + '!' |
end |
end |
| <= | HEY THERE, SONNY! GIVE GRANDMA A KISS! |
| => | hi, grandma |
| <= | HUH?! SPEAK UP, SONNY! |
| => | HI, GRANDMA! |
| <= | NO, NOT SINCE 1945! |
| => | HOW YOU DOING? |
| <= | NO, NOT SINCE 1933! |
| => | I SAID, HOW YOU DOING? |
| <= | NO, NOT SINCE 1944! |
| => | OK |
| <= | NO, NOT SINCE 1934! |
| => | BYE |
| <= | BYE SWEETIE! |
How I would do it:
puts 'HEY THERE, SONNY! GIVE GRANDMA A KISS!' |
|
while true |
said = gets.chomp |
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break if said == "BYE" |
response = if said != said.upcase |
'HUH?! SPEAK UP, SONNY!' |
else |
"NO, NOT SINCE #{rand(1930..1950)}!" |
end |
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puts response |
end |
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puts 'BYE SWEETIE!' |
| <= | HEY THERE, SONNY! GIVE GRANDMA A KISS! |
| => | hi, grandma |
| <= | HUH?! SPEAK UP, SONNY! |
| => | HI, GRANDMA! |
| <= | NO, NOT SINCE 1941! |
| => | HOW YOU DOING? |
| <= | NO, NOT SINCE 1932! |
| => | I SAID, HOW YOU DOING? |
| <= | NO, NOT SINCE 1949! |
| => | OK |
| <= | NO, NOT SINCE 1950! |
| => | BYE |
| <= | BYE SWEETIE! |
Deaf Grandma Extended
How you could do it:
puts 'HEY THERE, PEACHES! GIVE GRANDMA A KISS!' |
bye_count = 0 |
while true |
said = gets.chomp |
if said == 'BYE' |
bye_count = bye_count + 1 |
else |
bye_count = 0 |
end |
if bye_count >= 3 |
puts 'BYE-BYE CUPCAKE!' |
break |
end |
if said != said.upcase |
puts 'HUH?! SPEAK UP, SONNY!' |
else |
random_year = 1930 + rand(21) |
puts 'NO, NOT SINCE ' + random_year.to_s + '!' |
end |
end |
| <= | HEY THERE, PEACHES! GIVE GRANDMA A KISS! |
| => | HI, GRANDMA! |
| <= | NO, NOT SINCE 1950! |
| => | BYE |
| <= | NO, NOT SINCE 1936! |
| => | BYE |
| <= | NO, NOT SINCE 1947! |
| => | ADIOS, MUCHACHA! |
| <= | NO, NOT SINCE 1949! |
| => | BYE |
| <= | NO, NOT SINCE 1940! |
| => | BYE |
| <= | NO, NOT SINCE 1938! |
| => | BYE |
| <= | BYE-BYE CUPCAKE! |
How I would do it:
puts 'HEY THERE, PEACHES! GIVE GRANDMA A KISS!' |
bye_count = 0 |
|
while true |
said = gets.chomp |
if said == 'BYE' |
bye_count += 1 |
else |
bye_count = 0 |
end |
break if bye_count >= 3 |
|
response = if said != said.upcase |
'HUH?! SPEAK UP, SONNY!' |
else |
"NO, NOT SINCE #{rand(1930..1950)}!" |
end |
|
puts response |
end |
|
puts 'BYE-BYE CUPCAKE!' |
| <= | HEY THERE, PEACHES! GIVE GRANDMA A KISS! |
| => | HI, GRANDMA! |
| <= | NO, NOT SINCE 1934! |
| => | BYE |
| <= | NO, NOT SINCE 1940! |
| => | BYE |
| <= | NO, NOT SINCE 1945! |
| => | ADIOS, MUCHACHA! |
| <= | NO, NOT SINCE 1931! |
| => | BYE |
| <= | NO, NOT SINCE 1932! |
| => | BYE |
| <= | NO, NOT SINCE 1949! |
| => | BYE |
| <= | BYE-BYE CUPCAKE! |
Leap Years
How you could do it:
puts 'Pick a starting year (like 1973 or something):' |
starting = gets.chomp.to_i |
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puts 'Now pick an ending year:' |
ending = gets.chomp.to_i |
|
puts 'Check it out... these years are leap years:' |
year = starting |
|
while year <= ending |
if year%4 == 0 |
if year%100 != 0 || year%400 == 0 |
puts year |
end |
end |
|
year = year + 1 |
end |
| <= | Pick a starting year (like 1973 or something): |
| => | 1973 |
| <= | Now pick an ending year: |
| => | 1977 |
| <= | Check it out... these years are leap years: |
| | 1976 |
How I would do it:
puts 'Pick a starting year (like 1973 or something):' |
starting = gets.chomp.to_i |
puts 'Now pick an ending year:' |
ending = gets.chomp.to_i |
puts 'Check it out... these years are leap years:' |
(starting..ending).each do |year| |
next if year%4 != 0 |
next if year%100 == 0 && year%400 != 0 |
puts year |
end |
| <= | Pick a starting year (like 1973 or something): |
| => | 1973 |
| <= | Now pick an ending year: |
| => | 1977 |
| <= | Check it out... these years are leap years: |
| | 1976 |
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