Calculate last day of month

ruby-talk
1

How do I return the date for the last day of this month (September in
this example)?

The last day in a month is the day before the first day in the next
month.

require 'date'
d = Date.new( 2006, 10, 1 )
puts d-1
#=> 2006-09-30

2

Gavin Kistner wrote:

How do I return the date for the last day of this month (September in this example)?

The last day in a month is the day before the first day in the next
month.

require 'date'
d = Date.new( 2006, 10, 1 )
puts d-1
#=> 2006-09-30

Slightly nicer is:
puts Date.new(2006, 9, -1)
#2006-09-30