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Get person's age in Ruby

Asked 2009-05-04T08:27:12.677
138

I'd like to get a person's age from its birthday. now - birthday / 365 doesn't work, because some years have 366 days. I came up with the following code:

now = Date.today
year = now.year - birth_date.year

if (date+year.year) > now
  year = year - 1
end

Is there a more Ruby'ish way to calculate age?

ruby-on-rails ruby
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2 Answers

54

I've found this solution to work well and be readable for other people:

    age = Date.today.year - birthday.year
    age -= 1 if Date.today < birthday + age.years #for days before birthday

Easy and you don't need to worry about handling leap year and such.

answered 2009-05-04T13:50:37.593
4

I like this one: 

now = Date.current
age = now.year - dob.year
age -= 1 if now.yday < dob.yday
answered 2012-02-03T14:35:03.433

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