From: Siep Korteling <s.korteling@...>
Date: 2008-03-05T06:36:17+09:00
Subject: Re: making a monthly calendar...

Mikkel Bruun wrote:
(...)
>> require 'date'
>> require 'enumerator'
>> 
>> def days_to_show(year, month, num_week_rows)
>>   # returns an array of the dates in month,
>>   # with the last days of the preceding month
>>   # and the first days of the next month
>> 
>>   first_of_month = Date.new(year, month, 1)
>>   first = first_of_month - (first_of_month.wday)+1
>>   # +1 for weeks starting on monday, remove for weeks starting on sunday
>>   last = first + (num_week_rows * 7)
>>   (first...last).to_a
>> end
>> 
>> days = days_to_show(2008, 3, 6)
>> days.each_slice(7) do |week|
>>   print "| "
>>   week.each{|day| print day.to_s + "\t| "}
>>   puts
>> end
>> 
(...)
> 
> What happens when you run ays = days_to_show(2008, 6, 6) ??? it shows 
> june as starting on sunday 2 of june....
> 
> really wierd
> 
> Mikkel

Argh.. Date#wday gives with a zero for sunday. But there is good luck to 
be found in ruby. With Date#cwday Monday is commercial day-of-week 1; 
Sunday is commercial day-of-week 7. Fine by me.


require 'date'
require 'enumerator'

def days_to_show(year, month, num_week_rows = 6)
  # returns an array of the dates in month,
  # with the last days of the preceding month
  # and the first days of the next mont

  first_of_month = Date.new(year, month, 1)
  first = first_of_month - first_of_month.cwday + 1
  # +1 for weeks starting on monday, remove for weeks starting on sunday
  last = first + num_week_rows * 7
  (first...last).to_a
end

1.upto(12) do |month|
  days = days_to_show(2008,month)
  days.each_slice(7) do |week|
    week.each{|day| print "| " + day.mday.to_s + "\t"}
    puts "|"
  end
  puts
end


Behaves better.
Regards,

Siep



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