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-rw-r--r--guides/source/active_support_core_extensions.md234
1 files changed, 134 insertions, 100 deletions
diff --git a/guides/source/active_support_core_extensions.md b/guides/source/active_support_core_extensions.md
index 067a7b7cb6..66d2fbd939 100644
--- a/guides/source/active_support_core_extensions.md
+++ b/guides/source/active_support_core_extensions.md
@@ -1796,7 +1796,7 @@ NOTE: Defined in `active_support/core_ext/numeric/bytes.rb`.
### Time
-Enables the use of time calculations and declarations, like `45.minutes + 2.hours + 4.years`.
+Enables the use of time calculations and declarations, like `45.minutes + 2.hours + 4.weeks`.
These methods use Time#advance for precise date calculations when using from_now, ago, etc.
as well as adding or subtracting their results from a Time object. For example:
@@ -1805,13 +1805,15 @@ as well as adding or subtracting their results from a Time object. For example:
# equivalent to Time.current.advance(months: 1)
1.month.from_now
-# equivalent to Time.current.advance(years: 2)
-2.years.from_now
+# equivalent to Time.current.advance(weeks: 2)
+2.weeks.from_now
-# equivalent to Time.current.advance(months: 4, years: 5)
-(4.months + 5.years).from_now
+# equivalent to Time.current.advance(months: 4, weeks: 5)
+(4.months + 5.weeks).from_now
```
+WARNING. For other durations please refer to the time extensions to `Integer`.
+
NOTE: Defined in `active_support/core_ext/numeric/time.rb`.
### Formatting
@@ -1947,6 +1949,28 @@ The method `ordinalize` returns the ordinal string corresponding to the receiver
NOTE: Defined in `active_support/core_ext/integer/inflections.rb`.
+### Time
+
+Enables the use of time calculations and declarations, like `4.months + 5.years`.
+
+These methods use Time#advance for precise date calculations when using from_now, ago, etc.
+as well as adding or subtracting their results from a Time object. For example:
+
+```ruby
+# equivalent to Time.current.advance(months: 1)
+1.month.from_now
+
+# equivalent to Time.current.advance(years: 2)
+2.years.from_now
+
+# equivalent to Time.current.advance(months: 4, years: 5)
+(4.months + 5.years).from_now
+```
+
+WARNING. For other durations please refer to the time extensions to `Numeric`.
+
+NOTE: Defined in `active_support/core_ext/integer/time.rb`.
+
Extensions to `BigDecimal`
--------------------------
### `to_s`
@@ -2946,6 +2970,32 @@ Extensions to `Date`
NOTE: All the following methods are defined in `active_support/core_ext/date/calculations.rb`.
+```ruby
+yesterday
+tomorrow
+beginning_of_week (at_beginning_of_week)
+end_of_week (at_end_of_week)
+monday
+sunday
+weeks_ago
+prev_week (last_week)
+next_week
+months_ago
+months_since
+beginning_of_month (at_beginning_of_month)
+end_of_month (at_end_of_month)
+last_month
+beginning_of_quarter (at_beginning_of_quarter)
+end_of_quarter (at_end_of_quarter)
+beginning_of_year (at_beginning_of_year)
+end_of_year (at_end_of_year)
+years_ago
+years_since
+last_year
+on_weekday?
+on_weekend?
+```
+
INFO: The following calculation methods have edge cases in October 1582, since days 5..14 just do not exist. This guide does not document their behavior around those days for brevity, but it is enough to say that they do what you would expect. That is, `Date.new(1582, 10, 4).tomorrow` returns `Date.new(1582, 10, 15)` and so on. Please check `test/core_ext/date_ext_test.rb` in the Active Support test suite for expected behavior.
#### `Date.current`
@@ -2956,68 +3006,6 @@ When making Date comparisons using methods which honor the user time zone, make
#### Named dates
-##### `prev_year`, `next_year`
-
-In Ruby 1.9 `prev_year` and `next_year` return a date with the same day/month in the last or next year:
-
-```ruby
-d = Date.new(2010, 5, 8) # => Sat, 08 May 2010
-d.prev_year # => Fri, 08 May 2009
-d.next_year # => Sun, 08 May 2011
-```
-
-If date is the 29th of February of a leap year, you obtain the 28th:
-
-```ruby
-d = Date.new(2000, 2, 29) # => Tue, 29 Feb 2000
-d.prev_year # => Sun, 28 Feb 1999
-d.next_year # => Wed, 28 Feb 2001
-```
-
-`prev_year` is aliased to `last_year`.
-
-##### `prev_month`, `next_month`
-
-In Ruby 1.9 `prev_month` and `next_month` return the date with the same day in the last or next month:
-
-```ruby
-d = Date.new(2010, 5, 8) # => Sat, 08 May 2010
-d.prev_month # => Thu, 08 Apr 2010
-d.next_month # => Tue, 08 Jun 2010
-```
-
-If such a day does not exist, the last day of the corresponding month is returned:
-
-```ruby
-Date.new(2000, 5, 31).prev_month # => Sun, 30 Apr 2000
-Date.new(2000, 3, 31).prev_month # => Tue, 29 Feb 2000
-Date.new(2000, 5, 31).next_month # => Fri, 30 Jun 2000
-Date.new(2000, 1, 31).next_month # => Tue, 29 Feb 2000
-```
-
-`prev_month` is aliased to `last_month`.
-
-##### `prev_quarter`, `next_quarter`
-
-Same as `prev_month` and `next_month`. It returns the date with the same day in the previous or next quarter:
-
-```ruby
-t = Time.local(2010, 5, 8) # => Sat, 08 May 2010
-t.prev_quarter # => Mon, 08 Feb 2010
-t.next_quarter # => Sun, 08 Aug 2010
-```
-
-If such a day does not exist, the last day of the corresponding month is returned:
-
-```ruby
-Time.local(2000, 7, 31).prev_quarter # => Sun, 30 Apr 2000
-Time.local(2000, 5, 31).prev_quarter # => Tue, 29 Feb 2000
-Time.local(2000, 10, 31).prev_quarter # => Mon, 30 Oct 2000
-Time.local(2000, 11, 31).next_quarter # => Wed, 28 Feb 2001
-```
-
-`prev_quarter` is aliased to `last_quarter`.
-
##### `beginning_of_week`, `end_of_week`
The methods `beginning_of_week` and `end_of_week` return the dates for the
@@ -3135,6 +3123,8 @@ Date.new(2012, 2, 29).years_ago(3) # => Sat, 28 Feb 2009
Date.new(2012, 2, 29).years_since(3) # => Sat, 28 Feb 2015
```
+`last_year` is short-hand for `#years_ago(1)`.
+
##### `months_ago`, `months_since`
The methods `months_ago` and `months_since` work analogously for months:
@@ -3151,6 +3141,8 @@ Date.new(2010, 4, 30).months_ago(2) # => Sun, 28 Feb 2010
Date.new(2009, 12, 31).months_since(2) # => Sun, 28 Feb 2010
```
+`last_month` is short-hand for `#months_ago(1)`.
+
##### `weeks_ago`
The method `weeks_ago` works analogously for weeks:
@@ -3313,35 +3305,7 @@ WARNING: `DateTime` is not aware of DST rules and so some of these methods have
NOTE: All the following methods are defined in `active_support/core_ext/date_time/calculations.rb`.
-The class `DateTime` is a subclass of `Date` so by loading `active_support/core_ext/date/calculations.rb` you inherit these methods and their aliases, except that they will always return datetimes:
-
-```ruby
-yesterday
-tomorrow
-beginning_of_week (at_beginning_of_week)
-end_of_week (at_end_of_week)
-monday
-sunday
-weeks_ago
-prev_week (last_week)
-next_week
-months_ago
-months_since
-beginning_of_month (at_beginning_of_month)
-end_of_month (at_end_of_month)
-prev_month (last_month)
-next_month
-beginning_of_quarter (at_beginning_of_quarter)
-end_of_quarter (at_end_of_quarter)
-beginning_of_year (at_beginning_of_year)
-end_of_year (at_end_of_year)
-years_ago
-years_since
-prev_year (last_year)
-next_year
-on_weekday?
-on_weekend?
-```
+The class `DateTime` is a subclass of `Date` so by loading `active_support/core_ext/date/calculations.rb` you inherit these methods and their aliases, except that they will always return datetimes.
The following methods are reimplemented so you do **not** need to load `active_support/core_ext/date/calculations.rb` for these ones:
@@ -3489,8 +3453,6 @@ Extensions to `Time`
NOTE: All the following methods are defined in `active_support/core_ext/time/calculations.rb`.
-Active Support adds to `Time` many of the methods available for `DateTime`:
-
```ruby
past?
today?
@@ -3502,6 +3464,8 @@ change
advance
ago
since (in)
+prev_day
+next_day
beginning_of_day (midnight, at_midnight, at_beginning_of_day)
end_of_day
beginning_of_hour (at_beginning_of_hour)
@@ -3517,15 +3481,17 @@ months_ago
months_since
beginning_of_month (at_beginning_of_month)
end_of_month (at_end_of_month)
-prev_month (last_month)
+prev_month
next_month
+last_month
beginning_of_quarter (at_beginning_of_quarter)
end_of_quarter (at_end_of_quarter)
beginning_of_year (at_beginning_of_year)
end_of_year (at_end_of_year)
years_ago
years_since
-prev_year (last_year)
+prev_year
+last_year
next_year
on_weekday?
on_weekend?
@@ -3583,6 +3549,74 @@ now.all_year
# => Fri, 01 Jan 2010 00:00:00 UTC +00:00..Fri, 31 Dec 2010 23:59:59 UTC +00:00
```
+#### `prev_day`, `next_day`
+
+In Ruby 1.9 `prev_day` and `next_day` return the date in the last or next day:
+
+```ruby
+d = Date.new(2010, 5, 8) # => Sat, 08 May 2010
+d.prev_day # => Fri, 07 May 2010
+d.next_day # => Sun, 09 May 2010
+```
+
+#### `prev_month`, `next_month`
+
+In Ruby 1.9 `prev_month` and `next_month` return the date with the same day in the last or next month:
+
+```ruby
+d = Date.new(2010, 5, 8) # => Sat, 08 May 2010
+d.prev_month # => Thu, 08 Apr 2010
+d.next_month # => Tue, 08 Jun 2010
+```
+
+If such a day does not exist, the last day of the corresponding month is returned:
+
+```ruby
+Date.new(2000, 5, 31).prev_month # => Sun, 30 Apr 2000
+Date.new(2000, 3, 31).prev_month # => Tue, 29 Feb 2000
+Date.new(2000, 5, 31).next_month # => Fri, 30 Jun 2000
+Date.new(2000, 1, 31).next_month # => Tue, 29 Feb 2000
+```
+
+#### `prev_year`, `next_year`
+
+In Ruby 1.9 `prev_year` and `next_year` return a date with the same day/month in the last or next year:
+
+```ruby
+d = Date.new(2010, 5, 8) # => Sat, 08 May 2010
+d.prev_year # => Fri, 08 May 2009
+d.next_year # => Sun, 08 May 2011
+```
+
+If date is the 29th of February of a leap year, you obtain the 28th:
+
+```ruby
+d = Date.new(2000, 2, 29) # => Tue, 29 Feb 2000
+d.prev_year # => Sun, 28 Feb 1999
+d.next_year # => Wed, 28 Feb 2001
+```
+
+#### `prev_quarter`, `next_quarter`
+
+`prev_quarter` and `next_quarter` return the date with the same day in the previous or next quarter:
+
+```ruby
+t = Time.local(2010, 5, 8) # => 2010-05-08 00:00:00 +0300
+t.prev_quarter # => 2010-02-08 00:00:00 +0200
+t.next_quarter # => 2010-08-08 00:00:00 +0300
+```
+
+If such a day does not exist, the last day of the corresponding month is returned:
+
+```ruby
+Time.local(2000, 7, 31).prev_quarter # => 2000-04-30 00:00:00 +0300
+Time.local(2000, 5, 31).prev_quarter # => 2000-02-29 00:00:00 +0200
+Time.local(2000, 10, 31).prev_quarter # => 2000-07-31 00:00:00 +0300
+Time.local(2000, 11, 31).next_quarter # => 2001-03-01 00:00:00 +0200
+```
+
+`prev_quarter` is aliased to `last_quarter`.
+
### Time Constructors
Active Support defines `Time.current` to be `Time.zone.now` if there's a user time zone defined, with fallback to `Time.now`: