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ハッシュの練習をしてみた
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# 6-1 | |
# 問1 | |
menu = { coffee: 300, caffe_latte: 400 } | |
p menu[:caffe_latte] | |
# 問2 | |
menu2 = { "モカ" => "チョコレートシロップ入り", "カフェラテ" => "ミルク入り" } | |
p menu2["モカ"] | |
# 6-2 | |
# 問3 | |
menu[:tea] = 300 | |
# 問4 | |
menu.delete(:coffee) | |
# 問5 | |
menu[:tea] = nil | |
puts "紅茶はありませんか?" unless menu[:tea] | |
# 問6 | |
menu = { coffee: 300, caffe_latte: 400 } | |
puts "カフェラテ下さい" if menu[:caffe_latte] | |
# 問7 | |
latte = "caffelatte".chars | |
p latte.group_by(&:itself).map { |key, value| [key, value.size] }.to_h | |
# 6-3 | |
# 問8 | |
menu = { "コーヒー" => 400, "カフェラテ" => 350 } | |
menu.each { |key, value| p "#{key} - #{value}円" } | |
# 問9 | |
menu = { "コーヒー" => 400, "カフェラテ" => 300 } | |
menu.each { |key, value| p "#{key} - #{value}円" if value >= 350 } | |
# 問10 | |
menu = {} | |
menu.each { |key, value| p "#{key} - #{value}円" if value >= 350 } | |
# これ実行するだけでいいのか? | |
# 問11 | |
menu = { "コーヒー" => 400, "カフェラテ" => 300 } | |
p menu.keys |
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