CODEWITHSUNDEEP
ruby
dhulihan
dhulihan

Reputation: 11303

Get Number of Months passed in Ruby

Is there an easy way to get the number of months(over multiple years) that have passed between two dates in ruby?

Upvotes: 0

Views: 510

Answers (3)

Jamie
Jamie

Reputation: 2265

I found this solution, it seems logical and seems to work.

startdate = Time.local(2001,2,28,0,0)
enddate = Time.local(2003,3,30,0,0)
months = (enddate.month - startdate.month) + 12 * (enddate.year - startdate.year)

Reference: http://blog.mindtonic.net/calculating-the-number-of-months-between-two-dates-in-ruby/

Upvotes: 3

Harish Shetty
Harish Shetty

Reputation: 64363

This addresses the month edge cases.(i.e. Mar 15 2009 - Jan 12 2010)

def months_between( d1, d2)
  d1, d2 = d2, d1 if d1 > d2
  y, m, d = (d2.year  - d1.year), (d2.month - d1.month), (d2.day - d1.day)
  m=m-1 if d < 0
  y, m = (y-1), (m+12) if m < 0
  y*12 + m
end

Upvotes: 0

Mladen Jablanović
Mladen Jablanović

Reputation: 44090

You could provide some test cases, here's one try, not tested very much really:

def months_between d1, d2
  d1, d2 = d2, d1 if d1 > d2
  (d2.year - d1.year)*12 + d2.month - d1.month - (d2.day >= d1.day ? 0 : 1)
end

Upvotes: 0

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