What's the most efficient way get the first day of the current month?

Question

With ruby I\'m trying to get format a date as such: 2009-10-01

Where I take the current date (2009-10-26) and then change the day to \"01\".

I know of ways to do

Answer 1

Time.parse("2009-10-26").strftime("%Y-%m-01")

Answer 2

If you don't mind including ActiveSupport in your application, you can simply do this:

require 'active_support'
date = Date.today.beginning_of_month

Answer 3

require 'date'    
now = Date.today
Date.new(now.year, now.month, 1)

Answer 4

If you need the date object without ActiveSupport, you can go back to the last day of the last month and sum 1.

Date.today - Date.today.mday + 1

Answer 5

Most efficient to get start and end date of current month

@date = DateTime.now   
@date.beginning_of_month
@date.end_of_month

Answer 6

This works...

Not terribly clever :/

require 'date'
Date.parse(Date.parse("2009-10-26").to_s[0,8] << "01")