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Date#change が便利

Ruby
Rails

Posted at 2017-02-02

既に生成済みのDateのインスタンスの月とか日だけ変えたい時のメソッドです。今日教えてもらえました、便利。

使い方

> Date.new(2017,2,3).change(day: 2)
Thu, 02 Feb 2017
> Date.new(2017,2,3).change(month: 3)
Fri, 03 Mar 2017
> Date.new(2017,2,3).change(month: 3, day: 2)
Thu, 02 Mar 2017

良い。

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