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@kasei-san(かせいさん)
in

金額や数値をカンマ区切りにしたい場合、JPYしか扱わないなら to_s(:delimited) を使うと楽

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Last updated at Posted at 2018-07-25

ActiveSupport::NumberHelper#number_to_currency もあるけど、すこし不便

ActiveSupport::NumericWithFormat#to_s(:delimited)ならシンプル

数値を(デフォルトでは)カンマ区切りにしてくれる

.ruby
1000000.to_s(:delimited) # => "1,000,000"

日本円をカンマ区切りにしたいならば、以下のようにすれば良い

.ruby
1000000.to_s(:delimited) + '円' # => "1,000,000円"

JPYしか扱わないなら、こっちのほうがシンプル

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