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-rw-r--r--activesupport/lib/active_support/core_ext/date_time/calculations.rb6
1 files changed, 5 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/core_ext/date_time/calculations.rb b/activesupport/lib/active_support/core_ext/date_time/calculations.rb
index dc4e767e9d..55ad384f4f 100644
--- a/activesupport/lib/active_support/core_ext/date_time/calculations.rb
+++ b/activesupport/lib/active_support/core_ext/date_time/calculations.rb
@@ -10,7 +10,11 @@ class DateTime
end
end
- # Seconds since midnight: DateTime.now.seconds_since_midnight.
+ # Returns the number of seconds since 00:00:00.
+ #
+ # DateTime.new(2012, 8, 29, 0, 0, 0).seconds_since_midnight # => 0
+ # DateTime.new(2012, 8, 29, 12, 34, 56).seconds_since_midnight # => 45296
+ # DateTime.new(2012, 8, 29, 23, 59, 59).seconds_since_midnight # => 86399
def seconds_since_midnight
sec + (min * 60) + (hour * 3600)
end