I need to calculate how many days lived on earth based on three parameters : day, month and year. I don't know how to convert the input onto a date; and then how to convert the date onto number of days. This is my code for the moment...
require 'date'
def age_in_days(day, month, year)
lived = (day+"-"+month+"-"+year).to_s
date_lived Date.parse(lived)
return (Date.today - date_lived).to_i
end
1 Answer
You can create a Date object directly with:
Date.new(year, month, day)
There's no need to convert it to a string and parse. Parsing could also be dangerous. Is 1982-04-02 the 4th of February or 2nd of April?
You cannot add a number and string like this, BTW. Should 1 + '2' be '12' or 3? Ruby cannot decide for you so you need to explicitly convert integers to string.
day.to_s + "-" + month.to_s + "-" + year.to_s
or simply
[day, month, year].join('-')
But you don't need it anyway:
require 'date'
def age_in_days(day, month, year)
birthdate = Date.new(year, month, day)
(Date.today - birthdate).to_i
end
