Get the date of the beginning and end of a month using Ruby

Sometimes Ruby blows my mind, I needed to get the start date and end date of the previous month. Guess what Ruby just happens to have methods to handle this - beginning_of_month, end_of_month, there is even beginning_of_quarter and end_of_quarter if you need them!

	last_month = Date.today.last_month # => Tue, 05 Oct 2010
	last_month.beginning_of_month # => Fri, 01 Oct 2010
	last_month.end_of_month # => Sun, 31 Oct 2010
	last_month.beginning_of_quarter # => Fri, 01 Oct 2010
	last_month.end_of_quarter # => Fri, 31 Dec 2010

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