Calculating the number of weeks in a year with Ruby

Question

Is there a way in Ruby to calculate the number of weeks(ISO 8601) for a given year? I\'m currently using a lookup table and I\'d like to stop using it.

Answer 1

You can do the following:

require 'date'
@year = 2001 #year you want to count the number of weeks
d = Date.new @year, 12, 30 # as in Date.new 
d.cweek # returns the commercial week number for the last week of the year, in this case, 52

if that's what you're looking for :)

PS: that only works for commercial year though, so in 2001, the 31th of December was actually commercial week 1