How do I get number of days in a year?
···
--
Posted via http://www.ruby-forum.com/.
Pål Bergström wrote:
How do I get number of days in a year?
Enter "number of days in a year" into Google and you'll get some useful
results.
The very first hit gives you
Google is your friend.
···
--
Posted via http://www.ruby-forum.com/\.
Just check if the year is leap. In google u'll find something like:
int __isleap <javascript:searchRef('__isleap')>(int
year<javascript:searchRef('year')>)
{
/* every fourth year is a leap year except for century years that are
* not divisible by 400. */
/* return (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)); */
return (!(year <javascript:searchRef('year')>%4) &&
((year<javascript:searchRef('year')>%100)
!(year <javascript:searchRef('year')>%400)));
}
···
On Mon, Oct 27, 2008 at 2:12 PM, Pål Bergström <pal@palbergstrom.com> wrote:
How do I get number of days in a year?
--
Posted via http://www.ruby-forum.com/\.
You can use the date library...
require 'date'; puts Date.new(2005) - Date.new(2004)
=> 366
Todd
···
On Mon, Oct 27, 2008 at 9:12 AM, Pål Bergström <pal@palbergstrom.com> wrote:
How do I get number of days in a year?
Todd Benson wrote:
···
On Mon, Oct 27, 2008 at 9:12 AM, P�l Bergstr�m <pal@palbergstrom.com> wrote:
How do I get number of days in a year?
You can use the date library...
require 'date'; puts Date.new(2005) - Date.new(2004)
=> 366Todd
So there's nothing like this (Rails)
Time.days_in_month()
--
Posted via http://www.ruby-forum.com/\.
You could just "require 'activesupport'"
or look at the code in activesupport...
condensed for your immediate use!
class Time
COMMON_YEAR_DAYS_IN_MONTH = [nil, 31, 28, 31, 30, 31, 30, 31, 31,
30, 31, 30, 31]
class << self
# Return the number of days in the given month.
# If no year is specified, it will use the current year.
def days_in_month(month, year = now.year)
return 29 if month == 2 && ::Date.gregorian_leap?(year)
COMMON_YEAR_DAYS_IN_MONTH[month]
end
end
end
···
On Mon, Oct 27, 2008 at 1:20 PM, Pål Bergström <pal@palbergstrom.com> wrote:
Todd Benson wrote:
On Mon, Oct 27, 2008 at 9:12 AM, P�l Bergstr�m <pal@palbergstrom.com> wrote:
How do I get number of days in a year?
You can use the date library...
require 'date'; puts Date.new(2005) - Date.new(2004)
=> 366Todd
So there's nothing like this (Rails)
Time.days_in_month()
A stupid question in the first place. I've done like this; I check if
Feb in a particular year has 29 days or not, so it gives 365 or 366
days. Simple. 
···
--
Posted via http://www.ruby-forum.com/.
Pål Bergström wrote:
A stupid question in the first place. I've done like this; I check if
Feb in a particular year has 29 days or not, so it gives 365 or 366
days. Simple.
And notice how days_in_month is implemented in activesupport:
def days_in_month(month, year = now.year)
return 29 if month == 2 && ::Date.gregorian_leap?(year)
COMMON_YEAR_DAYS_IN_MONTH[month]
end
So all you need is:
irb(main):001:0> require 'date'
=> true
irb(main):002:0> Date.gregorian_leap?(2008) ? 366 : 365
=> 366
irb(main):003:0> Date.gregorian_leap?(2009) ? 366 : 365
=> 365
···
--
Posted via http://www.ruby-forum.com/\.
Or ask the day of year of December 31st:
require 'date'
DateTime.new(2008, 12, 31).yday # => 366
DateTime.new(2009, 12, 31).yday # => 366
Best regards,
Jan Friedrich
···
Brian Candler <b.candler@pobox.com> wrote:
So all you need is:
irb(main):001:0> require 'date'
=> true
irb(main):002:0> Date.gregorian_leap?(2008) ? 366 : 365 => 366
irb(main):003:0> Date.gregorian_leap?(2009) ? 366 : 365 => 365
Or ask the day of year of December 31st:
require 'date'
DateTime.new(2008, 12, 31).yday # => 366
DateTime.new(2009, 12, 31).yday # => 365
Best regards,
Jan Friedrich
···
Brian Candler <b.candler@pobox.com> wrote:
So all you need is:
irb(main):001:0> require 'date'
=> true
irb(main):002:0> Date.gregorian_leap?(2008) ? 366 : 365 => 366
irb(main):003:0> Date.gregorian_leap?(2009) ? 366 : 365 => 365
Jan Friedrich wrote:
···
Brian Candler <b.candler@pobox.com> wrote:
Or ask the day of year of December 31st:
require 'date'
DateTime.new(2008, 12, 31).yday # => 366
DateTime.new(2009, 12, 31).yday # => 365
Best regards,
Jan Friedrich
That was smart. Thanks!
--
Posted via http://www.ruby-forum.com/\.