CalendarGrid 1.0.1

CalendarGrid 1.0.1 is a major bugfix to 1.0. Please upgrade now. If you tried 1.0 and were utterly disappointed, I apologize.

Note to Rails users. Never ever rely on the nifty date math methods for real date calculation. Try this:

Time.local(2005,10,30) + 1.day
=> Sun Oct 30 23:00:00 PST 2005

Um, what?

1.day
=> 86400
Time.local(2005,10,30) - Time.local(2005,10,29)
=> 86400.0
Time.local(2005,10,31) - Time.local(2005,10,30)
=> 90000.0

Lesson learned. Be careful with dates. This all came about because I switched from using Date to Time for everything internal.

Just in case anyone doesn't know how slow (but accurate!) Date is...

bm do |x|
  x.report("Date.today") do 
    1000.times { Date.today }
  end
  x.report("Time.now") do 
    1000.times { Time.now }
  end
end

            user       system     total       real
Date.today  0.420000   0.010000   0.430000 (  0.452072)
Time.now    0.000000   0.000000   0.000000 (  0.003978)

Thanks to Ben Bleything for the heads up!

There are 2 comments

  1. About 2 hours later, Ray said...

    No surprises here.

    You live in a time zone with daylight saving time.

    Use time.gm instead of time.local and you won't have this problem.

  2. 8 days later, shawn said...

    Hi Ryan,

    Is there an actual example of your CalendarGrid that produces HTML code with formatting?

    Thanks!