From: Todd Benson <caduceass@...>
Date: 2008-03-04T05:57:26+09:00
Subject: Re: making a monthly calendar...

On Mon, Mar 3, 2008 at 2:43 PM, Todd Benson <caduceass@gmail.com> wrote:
>
> On Mon, Mar 3, 2008 at 2:14 PM, Mikkel Bruun <mikkel@helenius.dk> wrote:
>  Yeah, I just realized the edge cases of January and December fail.  I
>  thought the Date object covered that with a -1 or 13 month.
>
>  I'm looking into it right now.  You might be better off subtracting a
>  week and adding a week for your big array.  For example...
>
>  puts Date.new(2008, 1, 5) - 7
>
>  => 2007-12-29

No, actually the same code works, you just have to turn the -1..1
range into a loop for 12, which can be done like this...

your_number % 12 + 1

so code would be...

require 'date'
today = Date.new(2008, 1, 8)#use whatever date you want
offset = Date.new(today.year, today.month, 1).wday
months_of_concern = (-1..1).map.inject([]) {|arr, i| arr << (today.month + i)}
months_of_concern.map! {|i| i % 12 + 1}
month_ranges = months_of_concern.map {|month| 1..Date.new( today.year,
month, -1 ).day}
day_sets = month_ranges.map {|i| i.to_a}
offset.times { day_sets[1].unshift day_sets[0].pop }
p day_sets[1..2].flatten.slice(0..42)

Todd