#leah petersen
#homework 2-16-16 "hours-in-a-year"

#format number strings with US-style commas
def separate_comma(number)
  whole, decimal = number.to_s.split(".")
  whole_with_commas = whole.chars.to_a.reverse.each_slice(3).map(&:join).join(",").reverse
  [whole_with_commas, decimal].compact.join(".")
end

#compute hours (24) in a year (365.25)
hours_in_year = 24 * 365.25
puts "There are " + separate_comma(hours_in_year) + " hours in a year."

#compute minutes (60 in hour) in a decade (10 years)
mins_in_year = hours_in_year * 60
mins_in_decade = mins_in_year * 10
puts "There are " + separate_comma(mins_in_decade) + " minutes in a decade."

#compute how many seconds old I am (31 years)
secs_in_year = mins_in_year * 60
age_in_seconds = secs_in_year * 31
puts "I am " + separate_comma(age_in_seconds) + " seconds old."

#compute Jeremy's age in years, he is 1,136,086,041.6 seconds old
jeremys_age = 1136086041.6 / secs_in_year
jeremys_age = jeremys_age.round
puts "Jeremy is " + separate_comma(jeremys_age) + " years old."