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* lib/time.rb: Clean up Time documentation. Patch by Jake Goulding.
[Ruby 1.9 - Bug #5416] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33418 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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@ -1,3 +1,8 @@
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Thu Oct 6 14:59:11 2011 Eric Hodel <drbrain@segment7.net>
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* lib/time.rb: Clean up Time documentation. Patch by Jake Goulding.
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[Ruby 1.9 - Bug #5416]
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Thu Oct 6 10:00:54 2011 Eric Hodel <drbrain@segment7.net>
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* enum.c (group_by): Improve documentation based on patch by b t.
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129
lib/time.rb
129
lib/time.rb
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@ -10,11 +10,12 @@ require 'date'
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# This library extends the Time class with the following conversions between
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# date strings and Time objects:
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#
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# * date-time defined by RFC 2822
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# * HTTP-date defined by RFC 2616
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# * datetime defined by XML Schema Part 2: Datatypes (ISO 8601)
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# * date-time defined by {RFC 2822}[http://www.ietf.org/rfc/rfc2822.txt]
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# * HTTP-date defined by {RFC 2616}[http://www.ietf.org/rfc/rfc2616.txt]
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# * dateTime defined by XML Schema Part 2: Datatypes ({ISO
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# 8601}[http://www.iso.org/iso/date_and_time_format])
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# * various formats handled by Date._parse
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# * various formats handled by Date._strptime
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# * custom formats handled by Date._strptime
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#
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# == Examples
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#
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@ -24,11 +25,12 @@ require 'date'
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#
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# All of these examples were done using the EST timezone which is GMT-5.
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#
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# === Creating a new Time instance
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# === Converting to a String
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#
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# The easiest way to create a new time object is to use either #parse or
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# #strptime. Each uses Date.__parse and Date.__strptime to create a new
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# instance of Time.
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# t = Time.now
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# t.iso8601 # => "2011-10-05T22:26:12-04:00"
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# t.rfc2822 # => "Wed, 05 Oct 2011 22:26:12 -0400"
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# t.httpdate # => "Thu, 06 Oct 2011 02:26:12 GMT"
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#
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# === Time.parse
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#
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@ -59,10 +61,10 @@ require 'date'
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# dt = DateTime.parse("2010-10-30")
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# md = MyDate.new(10,31,2010)
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#
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# Time.parse("12:00" d) #=> 2010-10-28 12:00:00 -0500
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# Time.parse("12:00" t) #=> 2010-10-29 12:00:00 -0500
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# Time.parse("12:00" dt) #=> 2010-10-30 12:00:00 -0500
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# Time.parse("12:00" md) #=> 2010-10-31 12:00:00 -0500
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# Time.parse("12:00", d) #=> 2010-10-28 12:00:00 -0500
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# Time.parse("12:00", t) #=> 2010-10-29 12:00:00 -0500
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# Time.parse("12:00", dt) #=> 2010-10-30 12:00:00 -0500
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# Time.parse("12:00", md) #=> 2010-10-31 12:00:00 -0500
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#
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# #parse also accepts an optional block. You can use this block to specify how
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# to handle the year component of the date. This is specifically designed for
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@ -85,7 +87,12 @@ require 'date'
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class Time
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class << Time
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ZoneOffset = {
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#
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# A hash of timezones mapped to hour differences from UTC. The
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# set of time zones corresponds to the ones specified by RFC 2822
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# and ISO 8601.
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#
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ZoneOffset = { # :nodoc:
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'UTC' => 0,
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# ISO 8601
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'Z' => 0,
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@ -102,6 +109,26 @@ class Time
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'N' => -1, 'O' => -2, 'P' => -3, 'Q' => -4, 'R' => -5, 'S' => -6,
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'T' => -7, 'U' => -8, 'V' => -9, 'W' => -10, 'X' => -11, 'Y' => -12,
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}
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#
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# Return the number of seconds the specified time zone differs
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# from UTC.
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#
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# Numeric time zones that include minutes, such as
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# <code>-10:00</code> or <code>+1330</code> will work, as will
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# simpler hour-only time zones like <code>-10</code> or
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# <code>+13</code>.
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#
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# Textual time zones listed in ZoneOffset are also supported.
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#
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# If the time zone does not match any of the above, +zone_offset+
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# will check if the local time zone (both with and without
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# potential Daylight Saving \Time changes being in effect) matches
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# +zone+. Specifying a value for +year+ will change the year used
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# to find the local time zone.
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#
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# If +zone_offset+ is unable to determine the offset, nil will be
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# returned.
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def zone_offset(zone, year=self.now.year)
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off = nil
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zone = zone.upcase
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@ -252,15 +279,15 @@ class Time
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# values (1 or 0) are assumed if broken or missing. For example:
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#
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# # Suppose it is "Thu Nov 29 14:33:20 GMT 2001" now and
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# # your timezone is GMT:
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# # your time zone is GMT:
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# now = Time.parse("Thu Nov 29 14:33:20 GMT 2001")
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# Time.parse("16:30", now) #=> 2001-11-29 16:30:00 +0900
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# Time.parse("7/23", now) #=> 2001-07-23 00:00:00 +0900
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# Time.parse("Aug 31", now) #=> 2001-08-31 00:00:00 +0900
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# Time.parse("Aug 2000", now) #=> 2000-08-01 00:00:00 +0900
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#
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# Since there are numerous conflicts among locally defined timezone
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# abbreviations all over the world, this method is not made to
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# Since there are numerous conflicts among locally defined time zone
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# abbreviations all over the world, this method is not intended to
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# understand all of them. For example, the abbreviation "CST" is
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# used variously as:
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#
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@ -271,29 +298,27 @@ class Time
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# +10:30 in Australia/Adelaide,
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# etc.
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#
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# Based on the fact, this method only understands the timezone
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# abbreviations described in RFC 822 and the system timezone, in the
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# Based on this fact, this method only understands the time zone
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# abbreviations described in RFC 822 and the system time zone, in the
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# order named. (i.e. a definition in RFC 822 overrides the system
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# timezone definition.) The system timezone is taken from
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# time zone definition.) The system time zone is taken from
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# <tt>Time.local(year, 1, 1).zone</tt> and
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# <tt>Time.local(year, 7, 1).zone</tt>.
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# If the extracted timezone abbreviation does not match any of them,
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# If the extracted time zone abbreviation does not match any of them,
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# it is ignored and the given time is regarded as a local time.
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#
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# ArgumentError is raised if Date._parse cannot extract information from
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# +date+ or Time class cannot represent specified date.
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# +date+ or if the Time class cannot represent specified date.
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#
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# This method can be used as fail-safe for other parsing methods as:
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# This method can be used as a fail-safe for other parsing methods as:
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#
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# Time.rfc2822(date) rescue Time.parse(date)
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# Time.httpdate(date) rescue Time.parse(date)
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# Time.xmlschema(date) rescue Time.parse(date)
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#
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# A failure for Time.parse should be checked, though.
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# A failure of Time.parse should be checked, though.
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#
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# time library should be required to use this method as follows.
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#
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# require 'time'
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# You must require 'time' to use this method.
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#
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def parse(date, now=self.now)
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comp = !block_given?
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@ -387,13 +412,11 @@ class Time
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# updated by RFC 1123.
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#
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# ArgumentError is raised if +date+ is not compliant with RFC 2822
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# or Time class cannot represent specified date.
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# or if the Time class cannot represent specified date.
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#
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# See #rfc2822 for more information on this format.
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#
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# time library should be required to use this method as follows.
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#
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# require 'time'
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# You must require 'time' to use this method.
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#
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def rfc2822(date)
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if /\A\s*
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@ -436,17 +459,15 @@ class Time
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alias rfc822 rfc2822
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#
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# Parses +date+ as HTTP-date defined by RFC 2616 and converts it to a Time
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# object.
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# Parses +date+ as an HTTP-date defined by RFC 2616 and converts it to a
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# Time object.
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#
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# ArgumentError is raised if +date+ is not compliant with RFC 2616 or Time
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# class cannot represent specified date.
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# ArgumentError is raised if +date+ is not compliant with RFC 2616 or if
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# the Time class cannot represent specified date.
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#
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# See #httpdate for more information on this format.
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#
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# time library should be required to use this method as follows.
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#
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# require 'time'
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# You must require 'time' to use this method.
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#
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def httpdate(date)
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if /\A\s*
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@ -486,18 +507,16 @@ class Time
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end
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#
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# Parses +date+ as dateTime defined by XML Schema and converts it to a Time
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# object. The format is restricted version of the format defined by ISO
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# 8601.
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# Parses +date+ as a dateTime defined by the XML Schema and converts it to
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# a Time object. The format is a restricted version of the format defined
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# by ISO 8601.
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#
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# ArgumentError is raised if +date+ is not compliant with the format or Time
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# class cannot represent specified date.
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# ArgumentError is raised if +date+ is not compliant with the format or if
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# the Time class cannot represent specified date.
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#
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# See #xmlschema for more information on this format.
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#
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# time library should be required to use this method as follows.
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#
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# require 'time'
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# You must require 'time' to use this method.
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#
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def xmlschema(date)
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if /\A\s*
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@ -541,9 +560,7 @@ class Time
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#
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# If +self+ is a UTC time, -0000 is used as zone.
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#
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# time library should be required to use this method as follows.
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#
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# require 'time'
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# You must require 'time' to use this method.
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#
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def rfc2822
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sprintf('%s, %02d %s %0*d %02d:%02d:%02d ',
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@ -569,16 +586,14 @@ class Time
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]
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#
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# Returns a string which represents the time as rfc1123-date of HTTP-date
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# Returns a string which represents the time as RFC 1123 date of HTTP-date
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# defined by RFC 2616:
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#
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# day-of-week, DD month-name CCYY hh:mm:ss GMT
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#
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# Note that the result is always UTC (GMT).
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#
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# time library should be required to use this method as follows.
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#
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# require 'time'
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# You must require 'time' to use this method.
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#
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def httpdate
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t = dup.utc
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@ -589,7 +604,7 @@ class Time
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end
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#
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# Returns a string which represents the time as dateTime defined by XML
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# Returns a string which represents the time as a dateTime defined by XML
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# Schema:
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#
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# CCYY-MM-DDThh:mm:ssTZD
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@ -599,12 +614,10 @@ class Time
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#
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# If self is a UTC time, Z is used as TZD. [+-]hh:mm is used otherwise.
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#
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# +fractional_seconds+ specifies a number of digits of fractional seconds.
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# Its default value is 0.
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# +fractional_digits+ specifies a number of digits to use for fractional
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# seconds. Its default value is 0.
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#
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# time library should be required to use this method as follows.
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#
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# require 'time'
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# You must require 'time' to use this method.
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#
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def xmlschema(fraction_digits=0)
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sprintf('%0*d-%02d-%02dT%02d:%02d:%02d',
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