diff options
-rw-r--r-- | activesupport/lib/active_support/time_with_zone.rb | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/time_with_zone.rb b/activesupport/lib/active_support/time_with_zone.rb index 910c1f91a5..fa19961cec 100644 --- a/activesupport/lib/active_support/time_with_zone.rb +++ b/activesupport/lib/active_support/time_with_zone.rb @@ -307,10 +307,48 @@ module ActiveSupport end end + # Subtracts an interval of time from the current object's time and returns + # the result as a new TimeWithZone object. + # + # Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)' + # now = Time.zone.now # => Mon, 03 Nov 2014 00:26:28 EST -05:00 + # now.ago(1000) # => Mon, 03 Nov 2014 00:09:48 EST -05:00 + # + # If we're subtracting a Duration of variable length (i.e., years, months, + # days), move backward from #time, otherwise move backward from #utc, for + # accuracy when moving across DST boundaries. + # + # For instance, <tt>time.ago(24.hours)</tt> will move back exactly 24 hours, + # while <tt>time.ago(1.day)</tt> will move back 23-25 hours, depending on + # the day. + # + # now.ago(24.hours) # => Sun, 02 Nov 2014 01:26:28 EDT -04:00 + # now.ago(1.day) # => Sun, 02 Nov 2014 00:26:28 EDT -04:00 def ago(other) since(-other) end + # Uses Date to provide precise Time calculations for years, months, and days + # according to the proleptic Gregorian calendar. The result is returned as a + # new TimeWithZone object. + # + # The +options+ parameter takes a hash with any of these keys: + # <tt>:years</tt>, <tt>:months</tt>, <tt>:weeks</tt>, <tt>:days</tt>, + # <tt>:hours</tt>, <tt>:minutes</tt>, <tt>:seconds</tt>. + # + # If advancing by a value of variable length (i.e., years, weeks, months, + # days), move forward from #time, otherwise move forward from #utc, for + # accuracy when moving across DST boundaries. + # + # Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)' + # now = Time.zone.now # => Sun, 02 Nov 2014 01:26:28 EDT -04:00 + # now.advance(seconds: 1) # => Sun, 02 Nov 2014 01:26:29 EDT -04:00 + # now.advance(minutes: 1) # => Sun, 02 Nov 2014 01:27:28 EDT -04:00 + # now.advance(hours: 1) # => Sun, 02 Nov 2014 01:26:28 EST -05:00 + # now.advance(days: 1) # => Mon, 03 Nov 2014 01:26:28 EST -05:00 + # now.advance(weeks: 1) # => Sun, 09 Nov 2014 01:26:28 EST -05:00 + # now.advance(months: 1) # => Tue, 02 Dec 2014 01:26:28 EST -05:00 + # now.advance(years: 1) # => Mon, 02 Nov 2015 01:26:28 EST -05:00 def advance(options) # If we're advancing a value of variable length (i.e., years, weeks, months, days), advance from #time, # otherwise advance from #utc, for accuracy when moving across DST boundaries |