Class: Date

Inherits:
Object
  • Object
show all
Defined in:
lib/date/format.rb,
ext/date_ext/date_ext.c

Direct Known Subclasses

DateTime

Defined Under Namespace

Modules: Format

Constant Summary collapse

ITALY =

The julian day number for the day of calendar reform in Italy

LONG2NUM(RHR_JD_ITALY)
ENGLAND =

The julian day number for the day of calendar reform in England

LONG2NUM(RHR_JD_ENGLAND)
GREGORIAN =

An integer lower than the lowest supported julian day number

rhrd_start_num
JULIAN =

An integer higher than the highest supported julian day number

LONG2NUM(RHR_JD_MAX + 1)
ZONES =

A hash mapping lowercase time zone names to offsets in seconds<br />ZONES => -28800

rhrd_zones_hash
MONTHNAMES =

An array of month names<br />MONTHNAMES => ‘January’

rhrd_monthnames
ABBR_MONTHNAMES =

An array of abbreviated month names<br />ABBR_MONTHNAMES => ‘Jan’

rhrd_abbr_monthnames
DAYNAMES =

An array of day names<br />DAYNAMES => ‘Sunday’

rhrd_daynames
ABBR_DAYNAMES =

An array of abbreviated day names<br />ABBR_DAYNAMES => ‘Sun’

rhrd_abbr_daynames

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

._httpdate(str) ⇒ Object

call-seq:

[ruby 1-9 only] <br />
_httpdate(str) -> Hash or nil

Attempt to parse string using the 3 HTTP formats specified in RFC 2616. Returns a Hash of values if the string was parsed, and nil if not.



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# File 'lib/date/format.rb', line 796

def self._httpdate(str)
  if /\A\s*(#{Format::ABBR_DAYS.keys.join('|')})\s*,\s+
      \d{2}\s+
      (#{Format::ABBR_MONTHS.keys.join('|')})\s+
      -?\d{4}\s+ # allow minus, anyway
      \d{2}:\d{2}:\d{2}\s+
      gmt\s*\z/iox =~ str
    _rfc2822(str)
  elsif /\A\s*(#{Format::DAYS.keys.join('|')})\s*,\s+
      \d{2}\s*-\s*
      (#{Format::ABBR_MONTHS.keys.join('|')})\s*-\s*
      \d{2}\s+
      \d{2}:\d{2}:\d{2}\s+
      gmt\s*\z/iox =~ str
    _parse(str)
  elsif /\A\s*(#{Format::ABBR_DAYS.keys.join('|')})\s+
      (#{Format::ABBR_MONTHS.keys.join('|')})\s+
      \d{1,2}\s+
      \d{2}:\d{2}:\d{2}\s+
      \d{4}\s*\z/iox =~ str
    _parse(str)
  end
end

._iso8601(str) ⇒ Object

call-seq:

[ruby 1-9 only] <br />
_iso8601(str) -> Hash or nil

Attempt to parse string using a wide variety of ISO 8601 based formats, including the civil, commercial, and ordinal formats. Returns a Hash of values if the string was parsed, and nil if not.



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# File 'lib/date/format.rb', line 663

def self._iso8601(str)
  if /\A\s*(([-+]?\d{2,}|-)-\d{2}-\d{2}|
            ([-+]?\d{2,})?-\d{3}|
            (\d{2}|\d{4})?-w\d{2}-\d|
            -w-\d)
      (t
      \d{2}:\d{2}(:\d{2}([,.]\d+)?)?
      (z|[-+]\d{2}(:?\d{2})?)?)?\s*\z/ix =~ str
    _parse(str)
  elsif /\A\s*(([-+]?(\d{2}|\d{4})|--)\d{2}\d{2}|
            ([-+]?(\d{2}|\d{4}))?\d{3}|-\d{3}|
            (\d{2}|\d{4})?w\d{2}\d)
      (t?
      \d{2}\d{2}(\d{2}([,.]\d+)?)?
      (z|[-+]\d{2}(\d{2})?)?)?\s*\z/ix =~ str
    _parse(str)
  elsif /\A\s*(\d{2}:\d{2}(:\d{2}([,.]\d+)?)?
      (z|[-+]\d{2}(:?\d{2})?)?)?\s*\z/ix =~ str
    _parse(str)
  elsif /\A\s*(\d{2}\d{2}(\d{2}([,.]\d+)?)?
      (z|[-+]\d{2}(\d{2})?)?)?\s*\z/ix =~ str
    _parse(str)
  end
end

._jisx0301(str) ⇒ Object

call-seq:

[ruby 1-9 only] <br />
_jisx0301(str) -> Hash or nil

Attempt to parse string using the JIS X 0301 date format or ISO8601 format. Returns a Hash of values if the string was parsed, and nil if not.



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# File 'lib/date/format.rb', line 827

def self._jisx0301(str)
  if /\A\s*[mtsh]?\d{2}\.\d{2}\.\d{2}
      (t
      (\d{2}:\d{2}(:\d{2}([,.]\d*)?)?
      (z|[-+]\d{2}(:?\d{2})?)?)?)?\s*\z/ix =~ str
    if /\A\s*\d/ =~ str
      _parse(str.sub(/\A\s*(\d)/, 'h\1'))
    else
      _parse(str)
    end
  else
    _iso8601(str)
  end
end

._parse(str, comp = true) ⇒ Object

call-seq:

_parse(str, comp=true) -> Hash

Attempt to parse the string by trying a wide variety of date formats sequentially (unless a match is found by the fast Ragel-based parser). The comp argument determines whether to convert 2-digit years to 4-digit years. If the str is not in a supported format, an empty hash will be returned.

This method searches for a match anywhere in the string, unlike most of the other ruby 1.9-only parsing methods which require that an exact match for the entire string.



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# File 'lib/date/format.rb', line 586

def self._parse(str, comp=true)
  if v = _ragel_parse(str)
    return v
  end

  str = str.dup

  e = {:_ => {:comp => comp}}
  str.gsub!(/[^-+',.\/:@[:alnum:]\[\]]+/, ' ')

  _parse_time(str, e)
  _parse_day(str, e)

  _parse_eu(str, e)     ||
  _parse_us(str, e)     ||
  _parse_iso(str, e)    ||
  _parse_jis(str, e)    ||
  _parse_vms(str, e)    ||
  _parse_sla(str, e)    ||
  _parse_dot(str, e)    ||
  _parse_iso2(str, e)   ||
  _parse_year(str, e)   ||
  _parse_mon(str, e)    ||
  _parse_mday(str, e)   ||
  _parse_ddd(str, e)

  if str.sub!(/\b(bc\b|bce\b|b\.c\.|b\.c\.e\.)/i, ' ')
    if e[:year]
      e[:year] = -e[:year] + 1
    end
  end

  if str.sub!(/\A\s*(\d{1,2})\s*\z/, ' ')
    if e[:hour] && !e[:mday]
      v = $1.to_i
      if (1..31) === v
        e[:mday] = v
      end
    end
    if e[:mday] && !e[:hour]
      v = $1.to_i
      if (0..24) === v
        e[:hour] = v
      end
    end
  end

  if e[:_][:comp]
    if e[:cwyear]
      if e[:cwyear] >= 0 && e[:cwyear] <= 99
        e[:cwyear] += if e[:cwyear] >= 69
                    then 1900 else 2000 end
      end
    end
    if e[:year]
      if e[:year] >= 0 && e[:year] <= 99
        e[:year] += if e[:year] >= 69
                  then 1900 else 2000 end
      end
    end
  end

  e[:offset] ||= zone_to_diff(e[:zone]) if e[:zone]

  e.delete(:_)
  e
end

._rfc2822(str) ⇒ Object Also known as: _rfc822

call-seq:

[ruby 1-9 only] <br />
_rfc2822(str) -> Hash or nil

Attempt to parse string using the RFC 2822 format used in email. It’s similar to the preferred HTTP format except specific offsets can be used. Returns a Hash of values if the string was parsed, and nil if not.



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# File 'lib/date/format.rb', line 765

def self._rfc2822(str)
  if /\A\s*(?:(?:#{Format::ABBR_DAYS.keys.join('|')})\s*,\s+)?
      \d{1,2}\s+
      (?:#{Format::ABBR_MONTHS.keys.join('|')})\s+
      -?(\d{2,})\s+ # allow minus, anyway
      \d{2}:\d{2}(:\d{2})?\s*
      (?:[-+]\d{4}|ut|gmt|e[sd]t|c[sd]t|m[sd]t|p[sd]t|[a-ik-z])\s*\z/iox =~ str
    e = _parse(str, false)
    if $1.size < 4
      if e[:year] < 50
        e[:year] += 2000
      elsif e[:year] < 1000
        e[:year] += 1900
      end
    end
    e
  end
end

._rfc3339(str) ⇒ Object

call-seq:

[ruby 1-9 only] <br />
_rfc3339(str) -> Hash or nil

Attempt to parse string using the RFC 3339 format, which is the same as the ISO8601 civil format requiring a time and time zone. Returns a Hash of values if the string was parsed, and nil if not.



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# File 'lib/date/format.rb', line 696

def self._rfc3339(str)
  if /\A\s*-?\d{4}-\d{2}-\d{2} # allow minus, anyway
      (t|\s)
      \d{2}:\d{2}:\d{2}(\.\d+)?
      (z|[-+]\d{2}:\d{2})\s*\z/ix =~ str
    _parse(str)
  end
end

._xmlschema(str) ⇒ Object

call-seq:

[ruby 1-9 only] <br />
_xmlschema(str) -> Hash or nil

Attempt to parse string using the XML schema format, which is similar to the ISO8601 civil format, with most parts being optional. Returns a Hash of values if the string was parsed, and nil if not.



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# File 'lib/date/format.rb', line 713

def self._xmlschema(str)
  if /\A\s*(-?\d{4,})(?:-(\d{2})(?:-(\d{2}))?)?
      (?:t
        (\d{2}):(\d{2}):(\d{2})(?:\.(\d+))?)?
      (z|[-+]\d{2}:\d{2})?\s*\z/ix =~ str
    e = {}
    e[:year] = $1.to_i
    e[:mon] = $2.to_i if $2
    e[:mday] = $3.to_i if $3
    e[:hour] = $4.to_i if $4
    e[:min] = $5.to_i if $5
    e[:sec] = $6.to_i if $6
    e[:sec_fraction] = $7.to_i/10.0**$7.size if $7
    if $8
      e[:zone] = $8
      e[:offset] = zone_to_diff($8)
    end
    e
  elsif /\A\s*(\d{2}):(\d{2}):(\d{2})(?:\.(\d+))?
      (z|[-+]\d{2}:\d{2})?\s*\z/ix =~ str
    e = {}
    e[:hour] = $1.to_i if $1
    e[:min] = $2.to_i if $2
    e[:sec] = $3.to_i if $3
    e[:sec_fraction] = $4.to_i/10.0**$4.size if $4
    if $5
      e[:zone] = $5
      e[:offset] = zone_to_diff($5)
    end
    e
  elsif /\A\s*(?:--(\d{2})(?:-(\d{2}))?|---(\d{2}))
      (z|[-+]\d{2}:\d{2})?\s*\z/ix =~ str
    e = {}
    e[:mon] = $1.to_i if $1
    e[:mday] = $2.to_i if $2
    e[:mday] = $3.to_i if $3
    if $4
      e[:zone] = $4
      e[:offset] = zone_to_diff($4)
    end
    e
  end
end

Instance Method Details

#+(n) ⇒ Date

Returns a Date that is n days after the receiver. n can be negative, in which case it returns a Date before the receiver.

Date.civil(2009, 1, 2) + 2
# => #<Date 2009-01-04>
Date.civil(2009, 1, 2) + -2
# => #<Date 2008-12-31>

Returns:



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# File 'ext/date_ext/date_ext.c', line 2747

static VALUE rhrd_op_plus(VALUE self, VALUE other) {
   return rhrd__add_days(self, NUM2LONG(other));
}

#-(n) ⇒ Date <br /> #-(date) ⇒ Integer <br /> #-(datetime) ⇒ Float

If a Numeric argument is given, it is treated as an Integer, and the number of days it represents is substracted from the receiver to return a new Date object. n can be negative, in which case the Date returned will be after the receiver.

If a Date argument is given, returns the number of days between the current date and the argument as an Integer.

If a DateTime argument is given, returns the number of days between the current date and the argument as a Float, and considers the receiver to be in the same time zone as the argument.

Other types of arguments raise a TypeError.

Date.civil(2009, 1, 2) - 2
# => #<Date 2008-12-31>
Date.civil(2009, 1, 2) - Date.civil(2009, 1, 1)
# => 1
Date.civil(2009, 1, 2) - DateTime.civil(2009, 1, 3, 12)
# => -1.5

Overloads:

  • #-(n) ⇒ Date <br />

    Returns:

  • #-(date) ⇒ Integer <br />

    Returns:

    • (Integer <br />)
  • #-(datetime) ⇒ Float

    Returns:

    • (Float) 


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# File 'ext/date_ext/date_ext.c', line 2778

static VALUE rhrd_op_minus(VALUE self, VALUE other) {
  rhrd_t *d;
  rhrd_t *newd;
  rhrdt_t *newdt;
  Data_Get_Struct(self, rhrd_t, d);

  if (RTEST(rb_obj_is_kind_of(other, rb_cNumeric))) {
    return rhrd__add_days(self, -NUM2LONG(other));
  }
  if (RTEST((rb_obj_is_kind_of(other, rhrdt_class)))) {
    Data_Get_Struct(other, rhrdt_t, newdt);
    RHR_FILL_JD(d)
    RHRDT_FILL_JD(newdt)
    RHRDT_FILL_NANOS(newdt)
    return rb_float_new(d->jd - (newdt->jd + (double)newdt->nanos/RHR_NANOS_PER_DAYD));
  }
  if (RTEST((rb_obj_is_kind_of(other, rhrd_class)))) {
    Data_Get_Struct(other, rhrd_t, newd);
    RHR_FILL_JD(d)
    RHR_FILL_JD(newd)
    return LONG2NUM(rhrd__safe_add_long(d->jd, -newd->jd));
  }
  rb_raise(rb_eTypeError, "expected numeric or date");
}

#<<(n) ⇒ Date

Returns a Date that is n months before the receiver. n can be negative, in which case it returns a Date after the receiver.

Date.civil(2009, 1, 2) << 2
# => #<Date 2008-11-02>
Date.civil(2009, 1, 2) << -2
# => #<Date 2009-01-02>

Returns:



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# File 'ext/date_ext/date_ext.c', line 2731

static VALUE rhrd_op_left_shift(VALUE self, VALUE other) {
  return rhrd__add_months(self, -NUM2LONG(other));
}

#<=>(other) ⇒ -1, ...

If other is a Date, returns -1 if other is before the the receiver chronologically, 0 if other is the same date as the receiver, or 1 if other is after the receiver chronologically.

If other is a DateTime, return 0 if other has the same julian date as the receiver and no fractional part, -1 if other has a julian date less than the receiver’s, and 1 if other has a julian date greater than the receiver’s or a julian date the same as the receiver’s and a fractional part.

If other is a Numeric, convert it to an integer and compare it to the receiver’s julian date.

For an unrecognized type, return nil.

Returns:

  • (-1, 0, 1, nil) 


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# File 'ext/date_ext/date_ext.c', line 2856

static VALUE rhrd_op_spaceship(VALUE self, VALUE other) {
  rhrd_t *d, *o;
  rhrdt_t *odt;
  long diff;
  Data_Get_Struct(self, rhrd_t, d);

  if (RTEST(rb_obj_is_kind_of(other, rhrdt_class))) {
    Data_Get_Struct(other, rhrdt_t, odt);
    RHR_FILL_JD(d)
    RHRDT_FILL_JD(odt)
    RHR_SPACE_SHIP(diff, d->jd, odt->jd)
    if (diff == 0) {
      RHRDT_FILL_NANOS(odt)
      RHR_SPACE_SHIP(diff, 0, odt->nanos)
    }
    return LONG2NUM(diff);
  } else if (RTEST(rb_obj_is_kind_of(other, rhrd_class))) {
    Data_Get_Struct(other, rhrd_t, o);
    return LONG2NUM(rhrd__spaceship(d, o));
  } else if (RTEST((rb_obj_is_kind_of(other, rb_cNumeric)))) {
    diff = NUM2LONG(other);
    RHR_FILL_JD(d)
    RHR_SPACE_SHIP(diff, d->jd, diff)
    return LONG2NUM(diff);
  }
  return Qnil;
}

#===(other) ⇒ Boolean

If other is a Date, returns true if other is the same date as the receiver, or false otherwise.

If other is a DateTime, return true if +other has the same julian date as the receiver, or false otherwise.

If other is a Numeric, convert it to an Integer and return true if it is equal to the receiver’s julian date, or false otherwise.

Returns:

  • (Boolean) 


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# File 'ext/date_ext/date_ext.c', line 2816

static VALUE rhrd_op_relationship(VALUE self, VALUE other) {
  rhrd_t *d, *o;
  rhrdt_t *odt;
  long diff = 1;
  Data_Get_Struct(self, rhrd_t, d);

  if (RTEST(rb_obj_is_kind_of(other, rhrdt_class))) {
    Data_Get_Struct(other, rhrdt_t, odt);
    RHR_FILL_JD(d)
    RHRDT_FILL_JD(odt)
    diff = d->jd != odt->jd;
  } else if (RTEST(rb_obj_is_kind_of(other, rhrd_class))) {
    Data_Get_Struct(other, rhrd_t, o);
    diff = rhrd__spaceship(d, o);
  } else if (RTEST((rb_obj_is_kind_of(other, rb_cNumeric)))) {
    diff = NUM2LONG(other);
    RHR_FILL_JD(d)
    RHR_SPACE_SHIP(diff, d->jd, diff)
  }
  return diff == 0 ? Qtrue : Qfalse;
}

#>>(n) ⇒ Date

Returns a Date that is n months after the receiver. n can be negative, in which case it returns a Date before the receiver.

Date.civil(2009, 1, 2) >> 2
# => #<Date 2009-01-02>
Date.civil(2009, 1, 2) >> -2
# => #<Date 2008-11-02>

Returns:



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# File 'ext/date_ext/date_ext.c', line 2715

static VALUE rhrd_op_right_shift(VALUE self, VALUE other) {
  return rhrd__add_months(self, NUM2LONG(other));
}

#_dump(limit) ⇒ String

Returns a marshalled representation of the receiver as a String. Generally not called directly, usually called by Marshal.dump.

Returns:

  • (String) 


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# File 'ext/date_ext/date_ext.c', line 2050

static VALUE rhrd__dump(VALUE self, VALUE limit) {
  rhrd_t *d;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_JD(d)
  return rb_marshal_dump(LONG2NUM(d->jd), LONG2NUM(NUM2LONG(limit) - 1));
}

#asctime ⇒ String Also known as: ctime

Returns a string representation of the receiver. Example:

Date.civil(2009, 1, 2).asctime
# => "Fri Jan  2 00:00:00 2009"

Returns:

  • (String) 


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# File 'ext/date_ext/date_ext.c', line 2065

static VALUE rhrd_asctime(VALUE self) {
  VALUE s;
  rhrd_t *d;
  int len;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)
  RHR_FILL_JD(d)

  s = rb_str_buf_new(128);
  len = snprintf(RSTRING_PTR(s), 128, "%s %s %2i 00:00:00 %04li", 
        rhrd__abbr_day_names[rhrd__jd_to_wday(d->jd)],
        rhrd__abbr_month_names[d->month],
        (int)d->day,
        d->year);
  if (len == -1 || len > 127) {
    rb_raise(rb_eNoMemError, "in Date#asctime (in snprintf)");
  }

  RHR_RETURN_RESIZED_STR(s, len)
}

#cwday ⇒ Integer

Returns the commercial week day as an Integer. Example:

Date.civil(2009, 1, 2).cwday
# => 5
Date.civil(2010, 1, 2).cwday
# => 6

Returns:

  • (Integer) 


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# File 'ext/date_ext/date_ext.c', line 2096

static VALUE rhrd_cwday(VALUE self) {
  rhrd_t *d;
  rhrd_t n;
  RHR_CACHED_IV(self, rhrd_id_cwday)
  memset(&n, 0, sizeof(rhrd_t));
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_JD(d)
  n.jd = d->jd;
  rhrd__fill_commercial(&n);
  rhrd__set_cw_ivs(self, &n);
  return LONG2NUM(n.day);
}

#cweek ⇒ Integer

Returns the commercial week as an Integer. Example:

Date.civil(2009, 1, 2).cweek
# => 1
Date.civil(2010, 1, 2).cweek
# => 53

Returns:

  • (Integer) 


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# File 'ext/date_ext/date_ext.c', line 2119

static VALUE rhrd_cweek(VALUE self) {
  rhrd_t *d;
  rhrd_t n;
  RHR_CACHED_IV(self, rhrd_id_cweek)
  memset(&n, 0, sizeof(rhrd_t));
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_JD(d)
  n.jd = d->jd;
  rhrd__fill_commercial(&n);
  rhrd__set_cw_ivs(self, &n);
  return LONG2NUM(n.month);
}

#cwyear ⇒ Integer

Returns the commercial week year as an Integer. Example:

Date.civil(2009, 1, 2).cwyear
# => 2009
Date.civil(2010, 1, 2).cwyear
# => 2009

Returns:

  • (Integer) 


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# File 'ext/date_ext/date_ext.c', line 2142

static VALUE rhrd_cwyear(VALUE self) {
  rhrd_t *d;
  rhrd_t n;
  RHR_CACHED_IV(self, rhrd_id_cwyear)
  memset(&n, 0, sizeof(rhrd_t));
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_JD(d)
  n.jd = d->jd;
  rhrd__fill_commercial(&n);
  rhrd__set_cw_ivs(self, &n);
  return LONG2NUM(n.year);
}

#day ⇒ Integer Also known as: mday

Returns the day of the month as an Integer. Example:

Date.civil(2009, 1, 2).day
# => 2

Returns:

  • (Integer) 


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# File 'ext/date_ext/date_ext.c', line 2163

static VALUE rhrd_day(VALUE self) {
  rhrd_t *d;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)
  return LONG2NUM(d->day);
}

#day_fraction ⇒ 0

Date objects due not hold fractional days, so 0 is always returned.

Returns:

  • (0) 


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# File 'ext/date_ext/date_ext.c', line 2175

static VALUE rhrd_day_fraction(VALUE self) {
  return INT2FIX(0);
}

#downto(target) {|date| ... } ⇒ Date

Equivalent to calling step with the target as the first argument and -1 as the second argument. Returns self.

Date.civil(2009, 1, 2).downto(Date.civil(2009, 1, 1)) do |date|
  puts date
end
# Output:
# 2009-01-02
# 2009-01-01

Yields:

  • (date)

Returns:



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# File 'ext/date_ext/date_ext.c', line 2192

static VALUE rhrd_downto(VALUE self, VALUE other) {
  VALUE argv[2];
  argv[0] = other;
  argv[1] = INT2FIX(-1);
  return rhrd_step(2, argv, self);
}

#eql?(date) ⇒ Boolean

Returns true only if the date given is the same date as the receiver. If date is an instance of DateTime, returns true only if date is for the same date as the receiver and has no fractional component. Otherwise, returns false. Example:

Date.civil(2009, 1, 2).eql?(Date.civil(2009, 1, 2))
# => true
Date.civil(2009, 1, 2).eql?(Date.civil(2009, 1, 1))
# => false
Date.civil(2009, 1, 2).eql?(DateTime.civil(2009, 1, 2))
# => true
Date.civil(2009, 1, 2).eql?(DateTime.civil(2009, 1, 2, 1))
# => false

Returns:

  • (Boolean) 


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# File 'ext/date_ext/date_ext.c', line 2216

static VALUE rhrd_eql_q(VALUE self, VALUE other) {
  rhrd_t *d, *o;
  rhrdt_t *odt;
  long diff;
  Data_Get_Struct(self, rhrd_t, d);

  if (RTEST(rb_obj_is_kind_of(other, rhrdt_class))) {
    Data_Get_Struct(other, rhrdt_t, odt);
    RHR_FILL_JD(d)
    RHRDT_FILL_JD(odt)
    RHR_SPACE_SHIP(diff, d->jd, odt->jd)
    if (diff == 0) {
      RHRDT_FILL_NANOS(odt)
      RHR_SPACE_SHIP(diff, 0, odt->nanos)
    }
    return diff == 0 ? Qtrue : Qfalse;
  } else if (RTEST(rb_obj_is_kind_of(other, rhrd_class))) {
    Data_Get_Struct(other, rhrd_t, o);
    return rhrd__spaceship(d, o) == 0 ? Qtrue : Qfalse;
  }
  return Qfalse;
}

#friday? ⇒ Boolean

friday?() -> true or false

Returns true if the receiver is a Friday, false otherwise.

Returns:

  • (Boolean) 


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# File 'ext/date_ext/date_ext.c', line 3578

static VALUE rhrd_friday_q(VALUE self) {
  return rhrd__day_q(self, 5);
}

#gregorian ⇒ Date Also known as: england, italy, julian, to_date

This library does not support modifying the day of calendar reform, so this always returns self.

Returns:



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# File 'ext/date_ext/date_ext.c', line 2245

static VALUE rhrd_gregorian(VALUE self) {
  return self;
}

#gregorian? ⇒ true Also known as: ns?

This library always uses the Gregorian calendar, so this always returns true.

Returns:

  • (true) 


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# File 'ext/date_ext/date_ext.c', line 2255

static VALUE rhrd_gregorian_q(VALUE self) {
  return Qtrue;
}

#hash ⇒ Integer

Return an Integer hash value for the receiver, such that an equal date will have the same hash value.

Returns:

  • (Integer) 


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# File 'ext/date_ext/date_ext.c', line 2265

static VALUE rhrd_hash(VALUE self) {
  rhrd_t *d;
  RHR_CACHED_IV(self, rhrd_id_hash)
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_JD(d)
  return rb_ivar_set(self, rhrd_id_hash, rb_funcall(LONG2NUM(d->jd), rhrd_id_hash, 0));
}

#httpdate ⇒ Object

httpdate() -> String

Returns the receiver as a String in HTTP format. Example:

Date.civil(2009, 1, 2).httpdate
# => "Fri, 02 Jan 2009 00:00:00 GMT"



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# File 'ext/date_ext/date_ext.c', line 3138

static VALUE rhrd_httpdate(VALUE self) {
  VALUE s;
  rhrd_t *d;
  int len;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)
  RHR_FILL_JD(d)

  s = rb_str_buf_new(128);
  len = snprintf(RSTRING_PTR(s), 128, "%s, %02i %s %04li 00:00:00 GMT", 
        rhrd__abbr_day_names[rhrd__jd_to_wday(d->jd)],
        (int)d->day,
        rhrd__abbr_month_names[d->month],
        d->year);
  if (len == -1 || len > 127) {
    rb_raise(rb_eNoMemError, "in Date#httpdate (in snprintf)");
  }

  RHR_RETURN_RESIZED_STR(s, len)
}

#inspect ⇒ String

Return a developer-friendly string containing the civil date for the receiver. Example:

Date.civil(2009, 1, 2).inspect
# => "#<Date 2009-01-02>"

Returns:

  • (String) 


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# File 'ext/date_ext/date_ext.c', line 2282

static VALUE rhrd_inspect(VALUE self) {
  VALUE s;
  rhrd_t *d;
  int len;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)

  s = rb_str_buf_new(128);
  len = snprintf(RSTRING_PTR(s), 128, "#<Date %04li-%02i-%02i>",
        d->year, (int)d->month, (int)d->day);
  if (len == -1 || len > 127) {
    rb_raise(rb_eNoMemError, "in Date#inspect (in snprintf)");
  }

  RHR_RETURN_RESIZED_STR(s, len)
}

#jd ⇒ Integer Also known as: ajd

Return the julian day number for the receiver as an Integer.

Date.civil(2009, 1, 2).jd
# => 2454834

Returns:

  • (Integer) 


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# File 'ext/date_ext/date_ext.c', line 2307

static VALUE rhrd_jd(VALUE self) {
  rhrd_t *d;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_JD(d)
  return LONG2NUM(d->jd);
}

#jisx0301 ⇒ Object

jisx0301() -> String

Returns the receiver as a String in JIS X 0301 format. Example:

Date.civil(2009, 1, 2).jisx0301
# => "H21.01.02"



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# File 'ext/date_ext/date_ext.c', line 3168

static VALUE rhrd_jisx0301(VALUE self) {
  VALUE s;
  rhrd_t *d;
  int len;
  char c;
  long year;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)
  RHR_FILL_JD(d)

  s = rb_str_buf_new(128);
  if (d->jd < 2405160) {
    len = snprintf(RSTRING_PTR(s), 128, "%04li-%02i-%02i", d->year, (int)d->month, (int)d->day);
  } else {
    if (d->jd >= 2447535) {
      c = 'H';
      year = d->year - 1988;
    } else if (d->jd >= 2424875) {
      c = 'S';
      year = d->year - 1925;
    } else if (d->jd >= 2419614) {
      c = 'T';
      year = d->year - 1911;
    } else {
      c = 'M';
      year = d->year - 1867;
    }
    len = snprintf(RSTRING_PTR(s), 128, "%c%02li.%02i.%02i", c, year, (int)d->month, (int)d->day);
  }
  if (len == -1 || len > 127) {
    rb_raise(rb_eNoMemError, "in Date#jisx0301 (in snprintf)");
  }

  RHR_RETURN_RESIZED_STR(s, len)
}

#julian? ⇒ false Also known as: os?

This library always uses the Gregorian calendar, so this always returns false.

Returns:

  • (false) 


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# File 'ext/date_ext/date_ext.c', line 2320

static VALUE rhrd_julian_q(VALUE self) {
  return Qfalse;
}

#ld ⇒ Integer

Return the number of days since the Lilian Date (the day of calendar reform in Italy).

Date.civil(2009, 1, 2).ld
# => 155674

Returns:

  • (Integer) 


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# File 'ext/date_ext/date_ext.c', line 2333

static VALUE rhrd_ld(VALUE self) {
  rhrd_t *d;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_JD(d)
  return LONG2NUM(d->jd - RHR_JD_LD);
}

#leap? ⇒ Boolean

Return true if the current year for this date is a leap year in the Gregorian calendar, false otherwise.

Date.civil(2009, 1, 2).leap?
# => false
Date.civil(2008, 1, 2).leap?
# => true

Returns:

  • (Boolean) 


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# File 'ext/date_ext/date_ext.c', line 2351

static VALUE rhrd_leap_q(VALUE self) {
  rhrd_t *d;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)
  return rhrd__leap_year(d->year) ? Qtrue : Qfalse;
}

#mjd ⇒ Integer Also known as: amjd

Return the number of days since 1858-11-17.

Date.civil(2009, 1, 2).mjd
# => 54833

Returns:

  • (Integer) 


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# File 'ext/date_ext/date_ext.c', line 2366

static VALUE rhrd_mjd(VALUE self) {
  rhrd_t *d;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_JD(d)
  return LONG2NUM(d->jd - RHR_JD_MJD);
}

#monday? ⇒ Boolean

monday?() -> true or false

Returns true if the receiver is a Monday, false otherwise.

Returns:

  • (Boolean) 


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# File 'ext/date_ext/date_ext.c', line 3538

static VALUE rhrd_monday_q(VALUE self) {
  return rhrd__day_q(self, 1);
}

#month ⇒ Integer Also known as: mon

Returns the number of the month as an Integer. Example:

Date.civil(2009, 1, 2).month
# => 1

Returns:

  • (Integer) 


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# File 'ext/date_ext/date_ext.c', line 2381

static VALUE rhrd_month(VALUE self) {
  rhrd_t *d;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)
  return LONG2NUM(d->month);
}

#new_start(sg = nil) ⇒ Date Also known as: newsg

Returns self. Ignores an argument if given.

Returns:



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# File 'ext/date_ext/date_ext.c', line 2405

static VALUE rhrd_new_start(int argc, VALUE *argv, VALUE self) {
  switch(argc) {
    case 0:
    case 1:
      break;
    default:
      rb_raise(rb_eArgError, "wrong number of arguments: %i for 1", argc);
      break;
  }

  return self;
}

#next ⇒ Date Also known as: succ

Returns the Date after the receiver’s date:

Date.civil(2009, 1, 2).next
# => #<Date 2009-01-03>

Returns:



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# File 'ext/date_ext/date_ext.c', line 2396

static VALUE rhrd_next(VALUE self) {
   return rhrd__add_days(self, 1);
}

#next_day(*args) ⇒ Object

next_day(n=1) -> Date

Returns a Date n days after the receiver. If n is negative, returns a Date before the receiver.

Date.civil(2009, 1, 2).next_day
# => #<Date 2009-01-03>
Date.civil(2009, 1, 2).next_day(2)
# => #<Date 2009-01-04>



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# File 'ext/date_ext/date_ext.c', line 3216

static VALUE rhrd_next_day(int argc, VALUE *argv, VALUE self) {
  long i;

  switch(argc) {
    case 0:
      i = 1;
      break;
    case 1:
      i = NUM2LONG(argv[0]);
      break;
    default:
      rb_raise(rb_eArgError, "wrong number of arguments: %i for 1", argc);
      break;
  }

   return rhrd__add_days(self, i);
}

#next_month(*args) ⇒ Object

next_month(n=1) -> Date

Returns a Date n months after the receiver. If n is negative, returns a Date before the receiver.

Date.civil(2009, 1, 2).next_month
# => #<Date 2009-02-02>
Date.civil(2009, 1, 2).next_month(2)
# => #<Date 2009-03-02>



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# File 'ext/date_ext/date_ext.c', line 3246

static VALUE rhrd_next_month(int argc, VALUE *argv, VALUE self) {
  long i;

  switch(argc) {
    case 0:
      i = 1;
      break;
    case 1:
      i = NUM2LONG(argv[0]);
      break;
    default:
      rb_raise(rb_eArgError, "wrong number of arguments: %i for 1", argc);
      break;
  }

  return rhrd__add_months(self, i);
}

#next_year(*args) ⇒ Object

next_year(n=1) -> Date

Returns a Date n years after the receiver. If n is negative, returns a Date before the receiver.

Date.civil(2009, 1, 2).next_year
# => #<Date 2010-01-02>
Date.civil(2009, 1, 2).next_year(2)
# => #<Date 2011-01-02>



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# File 'ext/date_ext/date_ext.c', line 3276

static VALUE rhrd_next_year(int argc, VALUE *argv, VALUE self) {
  long i;

  switch(argc) {
    case 0:
      i = 1;
      break;
    case 1:
      i = NUM2LONG(argv[0]);
      break;
    default:
      rb_raise(rb_eArgError, "wrong number of arguments: %i for 1", argc);
      break;
  }

  return rhrd__add_years(self, i);
}

#prev_day(*args) ⇒ Object

prev_day(n=1) -> Date

Returns a Date n days before the receiver. If n is negative, returns a Date after the receiver.

Date.civil(2009, 1, 2).prev_day
# => #<Date 2009-01-01>
Date.civil(2009, 1, 2).prev_day(2)
# => #<Date 2008-12-31>



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# File 'ext/date_ext/date_ext.c', line 3306

static VALUE rhrd_prev_day(int argc, VALUE *argv, VALUE self) {
  long i;

  switch(argc) {
    case 0:
      i = -1;
      break;
    case 1:
      i = -NUM2LONG(argv[0]);
      break;
    default:
      rb_raise(rb_eArgError, "wrong number of arguments: %i for 1", argc);
      break;
  }

   return rhrd__add_days(self, i);
}

#prev_month(*args) ⇒ Object

prev_month(n=1) -> Date

Returns a Date n months before the receiver. If n is negative, returns a Date after the receiver.

Date.civil(2009, 1, 2).prev_month
# => #<Date 2008-12-02>
Date.civil(2009, 1, 2).prev_month(2)
# => #<Date 2008-11-02>



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# File 'ext/date_ext/date_ext.c', line 3336

static VALUE rhrd_prev_month(int argc, VALUE *argv, VALUE self) {
  long i;

  switch(argc) {
    case 0:
      i = -1;
      break;
    case 1:
      i = -NUM2LONG(argv[0]);
      break;
    default:
      rb_raise(rb_eArgError, "wrong number of arguments: %i for 1", argc);
      break;
  }

  return rhrd__add_months(self, i);
}

#prev_year(*args) ⇒ Object

prev_year(n=1) -> Date

Returns a Date n years before the receiver. If n is negative, returns a Date after the receiver.

Date.civil(2009, 1, 2).prev_year
# => #<Date 2008-01-02>
Date.civil(2009, 1, 2).prev_year(2)
# => #<Date 2007-01-02>



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# File 'ext/date_ext/date_ext.c', line 3366

static VALUE rhrd_prev_year(int argc, VALUE *argv, VALUE self) {
  long i;

  switch(argc) {
    case 0:
      i = -1;
      break;
    case 1:
      i = -NUM2LONG(argv[0]);
      break;
    default:
      rb_raise(rb_eArgError, "wrong number of arguments: %i for 1", argc);
      break;
  }

  return rhrd__add_years(self, i);
}

#rfc2822 ⇒ Object Also known as: rfc822

rfc2822() -> String

Returns the receiver as a String in RFC2822 format. Example:

Date.civil(2009, 1, 2).rfc2822
# => "Fri, 2 Jan 2009 00:00:00 +0000"



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# File 'ext/date_ext/date_ext.c', line 3393

static VALUE rhrd_rfc2822(VALUE self) {
  VALUE s;
  rhrd_t *d;
  int len;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)
  RHR_FILL_JD(d)

  s = rb_str_buf_new(128);
  len = snprintf(RSTRING_PTR(s), 128, "%s, %i %s %04li 00:00:00 +0000", 
        rhrd__abbr_day_names[rhrd__jd_to_wday(d->jd)],
        (int)d->day,
        rhrd__abbr_month_names[d->month],
        d->year);
  if (len == -1 || len > 127) {
    rb_raise(rb_eNoMemError, "in Date#rfc2822 (in snprintf)");
  }

  RHR_RETURN_RESIZED_STR(s, len)
}

#rfc3339 ⇒ Object

rfc3339() -> String

Returns the receiver as a String in RFC3339 format. Example:

Date.civil(2009, 1, 2).rfc3339
# => "2009-01-02T00:00:00+00:00"



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# File 'ext/date_ext/date_ext.c', line 3423

static VALUE rhrd_rfc3339(VALUE self) {
  VALUE s;
  rhrd_t *d;
  int len;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)

  s = rb_str_buf_new(128);
  len = snprintf(RSTRING_PTR(s), 128, "%04li-%02i-%02iT00:00:00+00:00", d->year, (int)d->month, (int)d->day);
  if (len == -1 || len > 127) {
    rb_raise(rb_eNoMemError, "in Date#rfc3339 (in snprintf)");
  }

  RHR_RETURN_RESIZED_STR(s, len)
}

#saturday? ⇒ Boolean

saturday?() -> true or false

Returns true if the receiver is a Saturday, false otherwise.

Returns:

  • (Boolean) 


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# File 'ext/date_ext/date_ext.c', line 3588

static VALUE rhrd_saturday_q(VALUE self) {
  return rhrd__day_q(self, 6);
}

#start ⇒ Integer Also known as: sg

Returns a number lower than the lowest julian date that can be correctly handled. Because this library always uses the Gregorian calendar, the day of calendar reform is chosen to be less than any date that this library can handle.

Returns:

  • (Integer) 


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# File 'ext/date_ext/date_ext.c', line 2426

static VALUE rhrd_start(VALUE self) {
  return rhrd_start_num;
}

#step(target, step = 1) {|date| ... } ⇒ Date

Yields Date objects between the receiver and the target date (inclusive), with step integer days between each yielded date. step can be negative, in which case the dates are yielded in reverse chronological order. Returns self in all cases.

If target is equal to the receiver, yields self once regardless of step. It target is less than receiver and step is nonnegative, or target is greater than receiver and step is nonpositive, does not yield.

Date.civil(2009, 1, 2).step(Date.civil(2009, 1, 6), 2) do |date|
  puts date
end
# Output:
# 2009-01-02
# 2009-01-04
# 2009-01-06

Yields:

  • (date)

Returns:



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# File 'ext/date_ext/date_ext.c', line 2451

static VALUE rhrd_step(int argc, VALUE *argv, VALUE self) {
  rhrd_t *d, *n, *newd;
  rhrdt_t *ndt;
  long step, limit, current;
  VALUE rlimit, new, rstep, klass;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_JD(d)

  switch(argc) {
    case 1:
      step = 1;
      rstep = LONG2NUM(step);
      break;
    case 2:
      rstep = argv[1];
      step = NUM2LONG(rstep);
      break;
    default:
      rb_raise(rb_eArgError, "wrong number of arguments: %i for 2", argc);
      break;
  }
  rlimit = argv[0];
  klass = rb_obj_class(self);

#ifdef RUBY19
  if (!rb_block_given_p()) {
    return rb_funcall(self, rhrd_id_to_enum, 3, rhrd_sym_step, rlimit, rstep);
  }
#else
  rb_need_block();
#endif

  if (RTEST(rb_obj_is_kind_of(rlimit, rb_cNumeric))) {
    limit = NUM2LONG(rlimit);
  } else if (RTEST((rb_obj_is_kind_of(rlimit, rhrdt_class)))) {
    Data_Get_Struct(rlimit, rhrdt_t, ndt);
    RHRDT_FILL_JD(ndt)
    limit = ndt->jd;
  } else if (RTEST((rb_obj_is_kind_of(rlimit, rhrd_class)))) {
    Data_Get_Struct(rlimit, rhrd_t, n);
    RHR_FILL_JD(n)
    limit = n->jd;
  } else {
    rb_raise(rb_eTypeError, "expected numeric or date");
  }

  current = d->jd;
  if (limit > current) {
    if (step > 0) {
      while(limit >= current) {
        new = Data_Make_Struct(klass, rhrd_t, NULL, -1, newd);
        newd->jd = current;
        RHR_CHECK_JD(newd)
        newd->flags = RHR_HAVE_JD;
        current += step;
        rb_yield(new);
      }
    }
  } else if (limit < current) {
    if (step < 0) {
      while(limit <= current) {
        new = Data_Make_Struct(klass, rhrd_t, NULL, -1, newd);
        newd->jd = current;
        RHR_CHECK_JD(newd)
        newd->flags = RHR_HAVE_JD;
        current += step;
        rb_yield(new);
      }
    }
  } else {
    rb_yield(self);
  }

  return self;
}

#strftime ⇒ String <br /> #strftime(format) ⇒ String

If no argument is provided, returns a string in ISO8601 format, just like to_s. If an argument is provided, uses it as a format string and returns a String based on the format. The following formats parts are supported:

%a

The abbreviated day name (e.g. Fri)

%A

The full day name (e.g. Friday)

%b, %h

The abbreviated month name (e.g. Jan)

%B

The full month name (e.g. January)

%c

A full date and time representation (e.g. Fri Jan 02 13:29:39 2009)

%C

The century of the year (e.g. 20)

%d

The day of the month, with a leading zero if necessary (e.g. 02)

%e

The day of the month, with a leading space if necessary (e.g. 2)

%F

An ISO8601 date representation (e.g. 2009-01-02)

%g

The last 2 digits of the commercial week year (e.g. 09)

%G

The commercial week year (e.g. 2009)

%H

The hour of the day in 24 hour format, with a leading zero if necessary (e.g. 13)

%I

The hour of the day in 12 hour format (e.g. 01)

%j

The day of the year (e.g. 002)

%k

The hour of the day in 24 hour format, with a leading space if necessary (e.g. 13)

%l

The hour of the day in 12 hour format, with a leading space if necessary (e.g. 13)

%L

The number of milliseconds in the fractional second, with leading zeros if necessary (e.g. 079)

%m

The month of the year (e.g. 01)

%M

The minute of the hour (e.g. 29)

%n

A newline (e.g. “n”)

%N

The number of nanoseconds in the fractional second, with leading zeros if necessary (e.g. 079013023)

%p

The meridian indicator, upcased (e.g. PM)

%P

The meridian indicator, downcased (e.g. pm)

%Q

The number of milliseconds since the unix epoch (e.g. 1230902979079)

%r

A full time representation in 12 hour format (e.g. 1:29:39 PM)

%R

An hour and minute representation in 24 hour format (e.g. 13:29)

%s

The number of seconds since the unix epoch (e.g. 1230902979)

%S

The second of the minute (e.g. 39)

%t

A tab (e.g. “t”)

%T, %X

A full time representation in 24 hour format (e.g. 13:29:39)

%u

The commercial week day (e.g. 5)

%U

The week number of the current year, with Sunday as the first day of the first week (e.g. 0)

%v

A full date representation (e.g. 2-Jan-2009)

%V

The commercial week (e.g. 01)

%w

The day of the week, with Sunday as 0 and Saturday as 6 (e.g. 5)

%W

The week number of the current year, with Monday as the first day of the first week (e.g. 0)

%x, %D

A full date representation in month/day/year format (e.g. 01/02/09)

%y

The last two digits of the year (e.g. 09)

%Y

The year (e.g. 2009)

%z

The offset from UTC, without a colon (e.g. +0000)

%Z

The offset from UTC, with a colon (e.g. +00:00)

%+

A full date and time representation, including the offset (e.g. Fri Jan 2 13:29:39 +00:00 2009)

All other formats (e.g. %f, %%) are handled by removing the leading percent sign. All other text is passed through literally.

Overloads:

  • #strftime ⇒ String <br />

    Returns:

    • (String <br />)
  • #strftime(format) ⇒ String

    Returns:

    • (String) 


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# File 'ext/date_ext/date_ext.c', line 2581

static VALUE rhrd_strftime(int argc, VALUE *argv, VALUE self) {
  rhrd_t *d;
  rhrdt_t dt;
  VALUE r;

  switch(argc) {
    case 0:
      return rhrd_to_s(self);
    case 1:
      r = rb_str_to_str(argv[0]);
      break;
    default:
      rb_raise(rb_eArgError, "wrong number of arguments: %i for 1", argc);
      break;
  }

  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)
  RHR_FILL_JD(d)
  memset(&dt, 0, sizeof(rhrdt_t));
  dt.jd = d->jd;
  dt.year = d->year;
  dt.month = d->month;
  dt.day = d->day;
  dt.flags = RHR_HAVE_CIVIL | RHR_HAVE_JD;
  return rhrd__strftime(&dt, RSTRING_PTR(r), RSTRING_LEN(r));
}

#sunday? ⇒ Boolean

sunday?() -> true or false

Returns true if the receiver is a Sunday, false otherwise.

Returns:

  • (Boolean) 


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# File 'ext/date_ext/date_ext.c', line 3528

static VALUE rhrd_sunday_q(VALUE self) {
  return rhrd__day_q(self, 0);
}

#thursday? ⇒ Boolean

thursday?() -> true or false

Returns true if the receiver is a Thursday, false otherwise.

Returns:

  • (Boolean) 


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# File 'ext/date_ext/date_ext.c', line 3568

static VALUE rhrd_thursday_q(VALUE self) {
  return rhrd__day_q(self, 4);
}

#to_datetime ⇒ Object

to_datetime() -> DateTime

Returns a DateTime equal to the receiver.

Date.civil(2009, 1, 2).to_datetime
# => #<DateTime 2009-01-02T00:00:00+00:00>



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# File 'ext/date_ext/date_ext.c', line 3448

static VALUE rhrd_to_datetime(VALUE self) {
  rhrd_t *d;
  rhrdt_t *dt;
  VALUE rdt = Data_Make_Struct(rhrdt_class, rhrdt_t, NULL, -1, dt);
  Data_Get_Struct(self, rhrd_t, d);

  if (RHR_HAS_CIVIL(d)) {
    dt->year = d->year;
    dt->month = d->month;
    dt->day = d->day;
    dt->flags |= RHR_HAVE_CIVIL;
  }
  if (RHR_HAS_JD(d)) {
    dt->jd = d->jd;
    dt->flags |= RHR_HAVE_JD;
  }

  return rdt;
}

#to_s ⇒ String Also known as: iso8601, xmlschema

Returns the receiver as an ISO8601 formatted string.

Date.civil(2009, 1, 2).to_s
# => "2009-01-02"

Returns:

  • (String) 


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# File 'ext/date_ext/date_ext.c', line 2617

static VALUE rhrd_to_s(VALUE self) {
  VALUE s;
  rhrd_t *d;
  int len;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)

  s = rb_str_buf_new(128);
  len = snprintf(RSTRING_PTR(s), 128, "%04li-%02i-%02i",
        d->year, (int)d->month, (int)d->day);
  if (len == -1 || len > 127) {
    rb_raise(rb_eNoMemError, "in Date#to_s (in snprintf)");
  }

  RHR_RETURN_RESIZED_STR(s, len)
}

#to_time ⇒ Object

to_time() -> Time

Returns a Time in local time with the same year, month, and day as the receiver.

Date.civil(2009, 1, 2).to_time
# => 2009-01-02 00:00:00 -0800



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# File 'ext/date_ext/date_ext.c', line 3478

static VALUE rhrd_to_time(VALUE self) {
  rhrd_t *d;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)
  return rb_funcall(rb_cTime, rhrd_id_local, 3, LONG2NUM(d->year), LONG2NUM(d->month), LONG2NUM(d->day));
}

#tuesday? ⇒ Boolean

tuesday?() -> true or false

Returns true if the receiver is a Tuesday, false otherwise.

Returns:

  • (Boolean) 


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# File 'ext/date_ext/date_ext.c', line 3548

static VALUE rhrd_tuesday_q(VALUE self) {
  return rhrd__day_q(self, 2);
}

#upto(target) {|date| ... } ⇒ Date

Equivalent to calling step with the target as the first argument. Returns self.

Date.civil(2009, 1, 1).upto(Date.civil(2009, 1, 2)) do |date|
  puts date
end
# Output:
# 2009-01-01
# 2009-01-02

Yields:

  • (date)

Returns:



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# File 'ext/date_ext/date_ext.c', line 2647

static VALUE rhrd_upto(VALUE self, VALUE other) {
  VALUE argv[1];
  argv[0] = other;
  return rhrd_step(1, argv, self);
}

#wday ⇒ Integer

Returns the day of the week as an Integer, where Sunday is 0 and Saturday is 6. Example:

Date.civil(2009, 1, 2).wday
# => 5

Returns:

  • (Integer) 


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# File 'ext/date_ext/date_ext.c', line 2662

static VALUE rhrd_wday(VALUE self) {
  rhrd_t *d;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_JD(d)
  return LONG2NUM(rhrd__jd_to_wday(d->jd));
}

#wednesday? ⇒ Boolean

wednesday?() -> true or false

Returns true if the receiver is a Wednesday, false otherwise.

Returns:

  • (Boolean) 


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# File 'ext/date_ext/date_ext.c', line 3558

static VALUE rhrd_wednesday_q(VALUE self) {
  return rhrd__day_q(self, 3);
}

#yday ⇒ Integer

Returns the day of the year as an Integer, where January 1st is 1 and December 31 is 365 (or 366 if the year is a leap year). Example:

Date.civil(2009, 2, 2).yday
# => 33

Returns:

  • (Integer) 


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# File 'ext/date_ext/date_ext.c', line 2679

static VALUE rhrd_yday(VALUE self) {
  rhrd_t *d;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)
  return LONG2NUM(rhrd__ordinal_day(d->year, d->month, d->day));
}

#year ⇒ Integer

Returns the year as an Integer. Example:

Date.civil(2009, 1, 2).year
# => 2009

Returns:

  • (Integer) 


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# File 'ext/date_ext/date_ext.c', line 2694

static VALUE rhrd_year(VALUE self) {
  rhrd_t *d;
  Data_Get_Struct(self, rhrd_t, d);
  RHR_FILL_CIVIL(d)
  return LONG2NUM(d->year);
}