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More than 3 years have passed since last update.

@ryuuuuuuuuuu(R)

Date.today.since(7.days)　←７日後

Posted at

何日後：since

何日前：ago

どちらも`Dateクラスが持っているメソッドである。

[1] pry(main)> Date.today
=> Tue, 08 Oct 2019

[2] pry(main)> Date.today.since(3.days)
=> Fri, 11 Oct 2019 00:00:00 JST +09:00

[3] pry(main)> Date.today.ago(3.days)
=> Sat, 05 Oct 2019 00:00:00 JST +09:00
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