Class: Time

Inherits:
Object show all
Includes:
Comparable
Defined in:
time.c

Overview

Time is an abstraction of dates and times. Time is stored internally as the number of seconds with fraction since the Epoch, January 1, 1970 00:00 UTC. Also see the library modules Date. The Time class treats GMT (Greenwich Mean Time) and UTC (Coordinated Universal Time)[Yes, UTC really does stand for Coordinated Universal Time. There was a committee involved.] as equivalent. GMT is the older way of referring to these baseline times but persists in the names of calls on POSIX systems.

All times may have fraction. Be aware of this fact when comparing times with each other---times that are apparently equal when displayed may be different when compared.

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Comparable

#<, #<=, #==, #>, #>=, #between?

Constructor Details

#new ⇒ Time #new(year, month = nil, day = nil, hour = nil, min = nil, sec = nil, utc_offset = nil) ⇒ Time

Returns a Time object.

It is initialized to the current system time if no argument. Note: The object created will be created using the resolution available on your system clock, and so may include fractional seconds.

If one or more arguments specified, the time is initialized to the specified time. sec may have fraction if it is a rational.

utc_offset is the offset from UTC. It is a string such as ???+09:00??? or a number of seconds such as 32400.

a = Time.new      #=> 2007-11-19 07:50:02 -0600
b = Time.new      #=> 2007-11-19 07:50:02 -0600
a == b            #=> false
"%.6f" % a.to_f   #=> "1195480202.282373"
"%.6f" % b.to_f   #=> "1195480202.283415"

Time.new(2008,6,21, 13,30,0, "+09:00") #=> 2008-06-21 13:30:00 +0900

# A trip for RubyConf 2007
t1 = Time.new(2007,11,1,15,25,0, "+09:00") # JST (Narita)
t2 = Time.new(2007,11,1,12, 5,0, "-05:00") # CDT (Minneapolis)
t3 = Time.new(2007,11,1,13,25,0, "-05:00") # CDT (Minneapolis)
t4 = Time.new(2007,11,1,16,53,0, "-04:00") # EDT (Charlotte)
t5 = Time.new(2007,11,5, 9,24,0, "-05:00") # EST (Charlotte)
t6 = Time.new(2007,11,5,11,21,0, "-05:00") # EST (Detroit)
t7 = Time.new(2007,11,5,13,45,0, "-05:00") # EST (Detroit)
t8 = Time.new(2007,11,6,17,10,0, "+09:00") # JST (Narita)
p((t2-t1)/3600.0)                          #=> 10.666666666666666
p((t4-t3)/3600.0)                          #=> 2.466666666666667
p((t6-t5)/3600.0)                          #=> 1.95
p((t8-t7)/3600.0)                          #=> 13.416666666666666

Overloads:

  • #new ⇒ Time
  • #new(year, month = nil, day = nil, hour = nil, min = nil, sec = nil, utc_offset = nil) ⇒ Time 



# File 'time.c'

static VALUE
time_init(int argc, VALUE *argv, VALUE time)
{
    if (argc == 0)
        return time_init_0(time);
    else
        return time_init_1(argc, argv, time);
}

Class Method Details

._load(string) ⇒ Time

Unmarshal a dumped Time object.

Returns:




# File 'time.c'

static VALUE
time_load(VALUE klass, VALUE str)
{
    VALUE time = time_s_alloc(klass);

    time_mload(time, str);
    return time;
}

.at(time) ⇒ Time .at(seconds_with_frac) ⇒ Time .at(seconds, microseconds_with_frac) ⇒ Time

Creates a new time object with the value given by time, the given number of seconds_with_frac, or seconds and microseconds_with_frac from the Epoch. seconds_with_frac and microseconds_with_frac can be Integer, Float, Rational, or other Numeric. non-portable feature allows the offset to be negative on some systems.

Time.at(0)            #=> 1969-12-31 18:00:00 -0600
Time.at(Time.at(0))   #=> 1969-12-31 18:00:00 -0600
Time.at(946702800)    #=> 1999-12-31 23:00:00 -0600
Time.at(-284061600)   #=> 1960-12-31 00:00:00 -0600
Time.at(946684800.2).usec #=> 200000
Time.at(946684800, 123456.789).nsec #=> 123456789

Overloads:

  • .at(time) ⇒ Time

    Returns:

  • .at(seconds_with_frac) ⇒ Time

    Returns:

  • .at(seconds, microseconds_with_frac) ⇒ Time

    Returns:




# File 'time.c'

static VALUE
time_s_at(int argc, VALUE *argv, VALUE klass)
{
VALUE time, t;
wideval_t timew;

if (rb_scan_args(argc, argv, "11", &time, &t) == 2) {
    time = num_exact(time);
    t = num_exact(t);
    timew = wadd(rb_time_magnify(v2w(time)), wmulquoll(v2w(t), TIME_SCALE, 1000000));
    t = time_new_timew(klass, timew);
}

.utc(year) ⇒ Time .utc(year, month) ⇒ Time .utc(year, month, day) ⇒ Time .utc(year, month, day, hour) ⇒ Time .utc(year, month, day, hour, min) ⇒ Time .utc(year, month, day, hour, min, sec_with_frac) ⇒ Time .utc(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time .utc(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time .gm(year) ⇒ Time .gm(year, month) ⇒ Time .gm(year, month, day) ⇒ Time .gm(year, month, day, hour) ⇒ Time .gm(year, month, day, hour, min) ⇒ Time .gm(year, month, day, hour, min, sec_with_frac) ⇒ Time .gm(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time .gm(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time

Creates a time based on given values, interpreted as UTC (GMT). The year must be specified. Other values default to the minimum value for that field (and may be nil or omitted). Months may be specified by numbers from 1 to 12, or by the three-letter English month names. Hours are specified on a 24-hour clock (0..23). Raises an ArgumentError if any values are out of range. Will also accept ten arguments in the order output by Time#to_a. sec_with_frac and usec_with_frac can have a fractional part.

Time.utc(2000,"jan",1,20,15,1)  #=> 2000-01-01 20:15:01 UTC
Time.gm(2000,"jan",1,20,15,1)   #=> 2000-01-01 20:15:01 UTC

Overloads:

  • .utc(year) ⇒ Time

    Returns:

  • .utc(year, month) ⇒ Time

    Returns:

  • .utc(year, month, day) ⇒ Time

    Returns:

  • .utc(year, month, day, hour) ⇒ Time

    Returns:

  • .utc(year, month, day, hour, min) ⇒ Time

    Returns:

  • .utc(year, month, day, hour, min, sec_with_frac) ⇒ Time

    Returns:

  • .utc(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time

    Returns:

  • .utc(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time

    Returns:

  • .gm(year) ⇒ Time

    Returns:

  • .gm(year, month) ⇒ Time

    Returns:

  • .gm(year, month, day) ⇒ Time

    Returns:

  • .gm(year, month, day, hour) ⇒ Time

    Returns:

  • .gm(year, month, day, hour, min) ⇒ Time

    Returns:

  • .gm(year, month, day, hour, min, sec_with_frac) ⇒ Time

    Returns:

  • .gm(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time

    Returns:

  • .gm(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time

    Returns:




# File 'time.c'

static VALUE
time_s_mkutc(int argc, VALUE *argv, VALUE klass)
{
    return time_utc_or_local(argc, argv, TRUE, klass);
}

.local(year) ⇒ Time .local(year, month) ⇒ Time .local(year, month, day) ⇒ Time .local(year, month, day, hour) ⇒ Time .local(year, month, day, hour, min) ⇒ Time .local(year, month, day, hour, min, sec_with_frac) ⇒ Time .local(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time .local(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time .mktime(year) ⇒ Time .mktime(year, month) ⇒ Time .mktime(year, month, day) ⇒ Time .mktime(year, month, day, hour) ⇒ Time .mktime(year, month, day, hour, min) ⇒ Time .mktime(year, month, day, hour, min, sec_with_frac) ⇒ Time .mktime(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time .mktime(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time

Same as Time::gm, but interprets the values in the local time zone.

Time.local(2000,"jan",1,20,15,1)   #=> 2000-01-01 20:15:01 -0600

Overloads:

  • .local(year) ⇒ Time

    Returns:

  • .local(year, month) ⇒ Time

    Returns:

  • .local(year, month, day) ⇒ Time

    Returns:

  • .local(year, month, day, hour) ⇒ Time

    Returns:

  • .local(year, month, day, hour, min) ⇒ Time

    Returns:

  • .local(year, month, day, hour, min, sec_with_frac) ⇒ Time

    Returns:

  • .local(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time

    Returns:

  • .local(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time

    Returns:

  • .mktime(year) ⇒ Time

    Returns:

  • .mktime(year, month) ⇒ Time

    Returns:

  • .mktime(year, month, day) ⇒ Time

    Returns:

  • .mktime(year, month, day, hour) ⇒ Time

    Returns:

  • .mktime(year, month, day, hour, min) ⇒ Time

    Returns:

  • .mktime(year, month, day, hour, min, sec_with_frac) ⇒ Time

    Returns:

  • .mktime(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time

    Returns:

  • .mktime(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time

    Returns:




# File 'time.c'

static VALUE
time_s_mktime(int argc, VALUE *argv, VALUE klass)
{
    return time_utc_or_local(argc, argv, FALSE, klass);
}

.local(year) ⇒ Time .local(year, month) ⇒ Time .local(year, month, day) ⇒ Time .local(year, month, day, hour) ⇒ Time .local(year, month, day, hour, min) ⇒ Time .local(year, month, day, hour, min, sec_with_frac) ⇒ Time .local(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time .local(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time .mktime(year) ⇒ Time .mktime(year, month) ⇒ Time .mktime(year, month, day) ⇒ Time .mktime(year, month, day, hour) ⇒ Time .mktime(year, month, day, hour, min) ⇒ Time .mktime(year, month, day, hour, min, sec_with_frac) ⇒ Time .mktime(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time .mktime(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time

Same as Time::gm, but interprets the values in the local time zone.

Time.local(2000,"jan",1,20,15,1)   #=> 2000-01-01 20:15:01 -0600

Overloads:

  • .local(year) ⇒ Time

    Returns:

  • .local(year, month) ⇒ Time

    Returns:

  • .local(year, month, day) ⇒ Time

    Returns:

  • .local(year, month, day, hour) ⇒ Time

    Returns:

  • .local(year, month, day, hour, min) ⇒ Time

    Returns:

  • .local(year, month, day, hour, min, sec_with_frac) ⇒ Time

    Returns:

  • .local(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time

    Returns:

  • .local(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time

    Returns:

  • .mktime(year) ⇒ Time

    Returns:

  • .mktime(year, month) ⇒ Time

    Returns:

  • .mktime(year, month, day) ⇒ Time

    Returns:

  • .mktime(year, month, day, hour) ⇒ Time

    Returns:

  • .mktime(year, month, day, hour, min) ⇒ Time

    Returns:

  • .mktime(year, month, day, hour, min, sec_with_frac) ⇒ Time

    Returns:

  • .mktime(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time

    Returns:

  • .mktime(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time

    Returns:




# File 'time.c'

static VALUE
time_s_mktime(int argc, VALUE *argv, VALUE klass)
{
    return time_utc_or_local(argc, argv, FALSE, klass);
}

.now ⇒ Object

Synonym for Time.new. Returns a Time object initialized to the current system time.




# File 'time.c'

/*
 *  call-seq:
 *     Time.now -> time
 *
 *  Creates a new time object for the current time.
 *
 *     Time.now            #=> 2009-06-24 12:39:54 +0900
 */

static VALUE
time_s_now(VALUE klass)
{
    return rb_class_new_instance(0, NULL, klass);
}

.utc(year) ⇒ Time .utc(year, month) ⇒ Time .utc(year, month, day) ⇒ Time .utc(year, month, day, hour) ⇒ Time .utc(year, month, day, hour, min) ⇒ Time .utc(year, month, day, hour, min, sec_with_frac) ⇒ Time .utc(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time .utc(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time .gm(year) ⇒ Time .gm(year, month) ⇒ Time .gm(year, month, day) ⇒ Time .gm(year, month, day, hour) ⇒ Time .gm(year, month, day, hour, min) ⇒ Time .gm(year, month, day, hour, min, sec_with_frac) ⇒ Time .gm(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time .gm(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time

Creates a time based on given values, interpreted as UTC (GMT). The year must be specified. Other values default to the minimum value for that field (and may be nil or omitted). Months may be specified by numbers from 1 to 12, or by the three-letter English month names. Hours are specified on a 24-hour clock (0..23). Raises an ArgumentError if any values are out of range. Will also accept ten arguments in the order output by Time#to_a. sec_with_frac and usec_with_frac can have a fractional part.

Time.utc(2000,"jan",1,20,15,1)  #=> 2000-01-01 20:15:01 UTC
Time.gm(2000,"jan",1,20,15,1)   #=> 2000-01-01 20:15:01 UTC

Overloads:

  • .utc(year) ⇒ Time

    Returns:

  • .utc(year, month) ⇒ Time

    Returns:

  • .utc(year, month, day) ⇒ Time

    Returns:

  • .utc(year, month, day, hour) ⇒ Time

    Returns:

  • .utc(year, month, day, hour, min) ⇒ Time

    Returns:

  • .utc(year, month, day, hour, min, sec_with_frac) ⇒ Time

    Returns:

  • .utc(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time

    Returns:

  • .utc(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time

    Returns:

  • .gm(year) ⇒ Time

    Returns:

  • .gm(year, month) ⇒ Time

    Returns:

  • .gm(year, month, day) ⇒ Time

    Returns:

  • .gm(year, month, day, hour) ⇒ Time

    Returns:

  • .gm(year, month, day, hour, min) ⇒ Time

    Returns:

  • .gm(year, month, day, hour, min, sec_with_frac) ⇒ Time

    Returns:

  • .gm(year, month, day, hour, min, sec, usec_with_frac) ⇒ Time

    Returns:

  • .gm(sec, min, hour, day, month, year, wday, yday, isdst, tz) ⇒ Time

    Returns:




# File 'time.c'

static VALUE
time_s_mkutc(int argc, VALUE *argv, VALUE klass)
{
    return time_utc_or_local(argc, argv, TRUE, klass);
}

Instance Method Details

#+(numeric) ⇒ Time

Addition---Adds some number of seconds (possibly fractional) to time and returns that value as a new time.

t = Time.now         #=> 2007-11-19 08:22:21 -0600
t + (60 * 60 * 24)   #=> 2007-11-20 08:22:21 -0600

Returns:




# File 'time.c'

static VALUE
time_plus(VALUE time1, VALUE time2)
{
struct time_object *tobj;
GetTimeval(time1, tobj);

if (IsTimeval(time2)) {
rb_raise(rb_eTypeError, "time + time?");
}

#-(other_time) ⇒ Float #-(numeric) ⇒ Time

Difference---Returns a new time that represents the difference between two times, or subtracts the given number of seconds in numeric from time.

t = Time.now       #=> 2007-11-19 08:23:10 -0600
t2 = t + 2592000   #=> 2007-12-19 08:23:10 -0600
t2 - t             #=> 2592000.0
t2 - 2592000       #=> 2007-11-19 08:23:10 -0600

Overloads:




# File 'time.c'

static VALUE
time_minus(VALUE time1, VALUE time2)
{
struct time_object *tobj;

GetTimeval(time1, tobj);
if (IsTimeval(time2)) {
struct time_object *tobj2;

GetTimeval(time2, tobj2);
    return rb_Float(rb_time_unmagnify_to_float(wsub(tobj->timew, tobj2->timew)));
}

#<=>(other_time) ⇒ -1, ...

Comparison---Compares time with other_time.

t = Time.now       #=> 2007-11-19 08:12:12 -0600
t2 = t + 2592000   #=> 2007-12-19 08:12:12 -0600
t <=> t2           #=> -1
t2 <=> t           #=> 1

t = Time.now       #=> 2007-11-19 08:13:38 -0600
t2 = t + 0.1       #=> 2007-11-19 08:13:38 -0600
t.nsec             #=> 98222999
t2.nsec            #=> 198222999
t <=> t2           #=> -1
t2 <=> t           #=> 1
t <=> t            #=> 0

Returns:

  • (-1, 0, +1, nil) 



# File 'time.c'

static VALUE
time_cmp(VALUE time1, VALUE time2)
{
struct time_object *tobj1, *tobj2;
int n;

GetTimeval(time1, tobj1);
if (IsTimeval(time2)) {
GetTimeval(time2, tobj2);
n = wcmp(tobj1->timew, tobj2->timew);
}

#_dump ⇒ String

Dump time for marshaling.

Returns:




# File 'time.c'

static VALUE
time_dump(int argc, VALUE *argv, VALUE time)
{
    VALUE str;

    rb_scan_args(argc, argv, "01", 0);
    str = time_mdump(time);

    return str;
}

#asctime ⇒ String #ctime ⇒ String

Returns a canonical string representation of time.

Time.now.asctime   #=> "Wed Apr  9 08:56:03 2003"

Overloads:




# File 'time.c'

static VALUE
time_asctime(VALUE time)
{
    return strftimev("%a %b %e %T %Y", time);
}

#asctime ⇒ String #ctime ⇒ String

Returns a canonical string representation of time.

Time.now.asctime   #=> "Wed Apr  9 08:56:03 2003"

Overloads:




# File 'time.c'

static VALUE
time_asctime(VALUE time)
{
    return strftimev("%a %b %e %T %Y", time);
}

#day ⇒ Fixnum #mday ⇒ Fixnum

Returns the day of the month (1..n) for time.

t = Time.now   #=> 2007-11-19 08:27:03 -0600
t.day          #=> 19
t.mday         #=> 19

Overloads:




# File 'time.c'

static VALUE
time_mday(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    MAKE_TM(time, tobj);
    return INT2FIX(tobj->vtm.mday);
}

#isdst ⇒ Boolean #dst? ⇒ Boolean

Returns true if time occurs during Daylight Saving Time in its time zone.

# CST6CDT:
  Time.local(2000, 1, 1).zone    #=> "CST"
  Time.local(2000, 1, 1).isdst   #=> false
  Time.local(2000, 1, 1).dst?    #=> false
  Time.local(2000, 7, 1).zone    #=> "CDT"
  Time.local(2000, 7, 1).isdst   #=> true
  Time.local(2000, 7, 1).dst?    #=> true

# Asia/Tokyo:
  Time.local(2000, 1, 1).zone    #=> "JST"
  Time.local(2000, 1, 1).isdst   #=> false
  Time.local(2000, 1, 1).dst?    #=> false
  Time.local(2000, 7, 1).zone    #=> "JST"
  Time.local(2000, 7, 1).isdst   #=> false
  Time.local(2000, 7, 1).dst?    #=> false

Overloads:

  • #isdst ⇒ Boolean

    Returns:

    • (Boolean)
  • #dst? ⇒ Boolean

    Returns:

    • (Boolean) 



# File 'time.c'

static VALUE
time_isdst(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    MAKE_TM(time, tobj);
    return tobj->vtm.isdst ? Qtrue : Qfalse;
}

#eql?(other_time) ⇒ Object

Return true if time and other_time are both Time objects with the same seconds and fractional seconds.




# File 'time.c'

static VALUE
time_eql(VALUE time1, VALUE time2)
{
struct time_object *tobj1, *tobj2;

GetTimeval(time1, tobj1);
if (IsTimeval(time2)) {
GetTimeval(time2, tobj2);
    return rb_equal(w2v(tobj1->timew), w2v(tobj2->timew));
}

#friday? ⇒ Boolean

Returns true if time represents Friday.

t = Time.local(1987, 12, 18)     #=> 1987-12-18 00:00:00 -0600
t.friday?                        #=> true

Returns:

  • (Boolean) 



# File 'time.c'

static VALUE
time_friday(VALUE time)
{
    wday_p(5);
}

#getgm ⇒ Time #getutc ⇒ Time

Returns a new new_time object representing time in UTC.

t = Time.local(2000,1,1,20,15,1)   #=> 2000-01-01 20:15:01 -0600
t.gmt?                             #=> false
y = t.getgm                        #=> 2000-01-02 02:15:01 UTC
y.gmt?                             #=> true
t == y                             #=> true

Overloads:




# File 'time.c'

static VALUE
time_getgmtime(VALUE time)
{
    return time_gmtime(time_dup(time));
}

#getlocal ⇒ Time #getlocal(utc_offset) ⇒ Time

Returns a new new_time object representing time in local time (using the local time zone in effect for this process).

If utc_offset is given, it is used instead of the local time.

t = Time.utc(2000,1,1,20,15,1)  #=> 2000-01-01 20:15:01 UTC
t.utc?                          #=> true

l = t.getlocal                  #=> 2000-01-01 14:15:01 -0600
l.utc?                          #=> false
t == l                          #=> true

j = t.getlocal("+09:00")        #=> 2000-01-02 05:15:01 +0900
j.utc?                          #=> false
t == j                          #=> true

Overloads:

  • #getlocal ⇒ Time

    Returns:

  • #getlocal(utc_offset) ⇒ Time

    Returns:




# File 'time.c'

static VALUE
time_getlocaltime(int argc, VALUE *argv, VALUE time)
{
VALUE off;
rb_scan_args(argc, argv, "01", &off);

if (!NIL_P(off)) {
    off = utc_offset_arg(off);
    validate_utc_offset(off);

    time = time_dup(time);
    time_set_utc_offset(time, off);
    return time_fixoff(time);
}

#getgm ⇒ Time #getutc ⇒ Time

Returns a new new_time object representing time in UTC.

t = Time.local(2000,1,1,20,15,1)   #=> 2000-01-01 20:15:01 -0600
t.gmt?                             #=> false
y = t.getgm                        #=> 2000-01-02 02:15:01 UTC
y.gmt?                             #=> true
t == y                             #=> true

Overloads:




# File 'time.c'

static VALUE
time_getgmtime(VALUE time)
{
    return time_gmtime(time_dup(time));
}

#utc? ⇒ Boolean #gmt? ⇒ Boolean

Returns true if time represents a time in UTC (GMT).

t = Time.now                        #=> 2007-11-19 08:15:23 -0600
t.utc?                              #=> false
t = Time.gm(2000,"jan",1,20,15,1)   #=> 2000-01-01 20:15:01 UTC
t.utc?                              #=> true

t = Time.now                        #=> 2007-11-19 08:16:03 -0600
t.gmt?                              #=> false
t = Time.gm(2000,1,1,20,15,1)       #=> 2000-01-01 20:15:01 UTC
t.gmt?                              #=> true

Overloads:

  • #utc? ⇒ Boolean

    Returns:

    • (Boolean)
  • #gmt? ⇒ Boolean

    Returns:

    • (Boolean) 



# File 'time.c'

static VALUE
time_utc_p(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (TIME_UTC_P(tobj)) return Qtrue;
    return Qfalse;
}

#gmt_offset ⇒ Fixnum #gmtoff ⇒ Fixnum #utc_offset ⇒ Fixnum

Returns the offset in seconds between the timezone of time and UTC.

t = Time.gm(2000,1,1,20,15,1)   #=> 2000-01-01 20:15:01 UTC
t.gmt_offset                    #=> 0
l = t.getlocal                  #=> 2000-01-01 14:15:01 -0600
l.gmt_offset                    #=> -21600

Overloads:




# File 'time.c'

static VALUE
time_utc_offset(VALUE time)
{
struct time_object *tobj;

GetTimeval(time, tobj);
MAKE_TM(time, tobj);

if (TIME_UTC_P(tobj)) {
return INT2FIX(0);
}

#gmtime ⇒ Time #utc ⇒ Time

Converts time to UTC (GMT), modifying the receiver.

t = Time.now   #=> 2007-11-19 08:18:31 -0600
t.gmt?         #=> false
t.gmtime       #=> 2007-11-19 14:18:31 UTC
t.gmt?         #=> true

t = Time.now   #=> 2007-11-19 08:18:51 -0600
t.utc?         #=> false
t.utc          #=> 2007-11-19 14:18:51 UTC
t.utc?         #=> true

Overloads:




# File 'time.c'

static VALUE
time_gmtime(VALUE time)
{
struct time_object *tobj;
struct vtm vtm;

GetTimeval(time, tobj);
if (TIME_UTC_P(tobj)) {
if (tobj->tm_got)
    return time;
}

#gmt_offset ⇒ Fixnum #gmtoff ⇒ Fixnum #utc_offset ⇒ Fixnum

Returns the offset in seconds between the timezone of time and UTC.

t = Time.gm(2000,1,1,20,15,1)   #=> 2000-01-01 20:15:01 UTC
t.gmt_offset                    #=> 0
l = t.getlocal                  #=> 2000-01-01 14:15:01 -0600
l.gmt_offset                    #=> -21600

Overloads:




# File 'time.c'

static VALUE
time_utc_offset(VALUE time)
{
struct time_object *tobj;

GetTimeval(time, tobj);
MAKE_TM(time, tobj);

if (TIME_UTC_P(tobj)) {
return INT2FIX(0);
}

#hash ⇒ Fixnum

Return a hash code for this time object.

Returns:




# File 'time.c'

static VALUE
time_hash(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    return rb_hash(w2v(tobj->timew));
}

#hour ⇒ Fixnum

Returns the hour of the day (0..23) for time.

t = Time.now   #=> 2007-11-19 08:26:20 -0600
t.hour         #=> 8

Returns:




# File 'time.c'

static VALUE
time_hour(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    MAKE_TM(time, tobj);
    return INT2FIX(tobj->vtm.hour);
}

#initialize_copy ⇒ Object

:nodoc:




# File 'time.c'

static VALUE
time_init_copy(VALUE copy, VALUE time)
{
    struct time_object *tobj, *tcopy;

    if (copy == time) return copy;
    time_modify(copy);
    GetTimeval(time, tobj);
    GetTimeval(copy, tcopy);
    MEMCPY(tcopy, tobj, struct time_object, 1);

    return copy;
}

#inspect ⇒ String #to_s ⇒ String

Returns a string representing time. Equivalent to calling Time#strftime with a format string of "%Y-%m-%d %H:%M:%S %z" for a local time and "%Y-%m-%d %H:%M:%S UTC" for a UTC time.

Time.now.to_s       #=> "2007-10-05 16:09:51 +0900"
Time.now.utc.to_s   #=> "2007-10-05 07:09:51 UTC"

Overloads:




# File 'time.c'

static VALUE
time_to_s(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (TIME_UTC_P(tobj))
        return strftimev("%Y-%m-%d %H:%M:%S UTC", time);
    else
        return strftimev("%Y-%m-%d %H:%M:%S %z", time);
}

#isdst ⇒ Boolean #dst? ⇒ Boolean

Returns true if time occurs during Daylight Saving Time in its time zone.

# CST6CDT:
  Time.local(2000, 1, 1).zone    #=> "CST"
  Time.local(2000, 1, 1).isdst   #=> false
  Time.local(2000, 1, 1).dst?    #=> false
  Time.local(2000, 7, 1).zone    #=> "CDT"
  Time.local(2000, 7, 1).isdst   #=> true
  Time.local(2000, 7, 1).dst?    #=> true

# Asia/Tokyo:
  Time.local(2000, 1, 1).zone    #=> "JST"
  Time.local(2000, 1, 1).isdst   #=> false
  Time.local(2000, 1, 1).dst?    #=> false
  Time.local(2000, 7, 1).zone    #=> "JST"
  Time.local(2000, 7, 1).isdst   #=> false
  Time.local(2000, 7, 1).dst?    #=> false

Overloads:

  • #isdst ⇒ Boolean

    Returns:

    • (Boolean)
  • #dst? ⇒ Boolean

    Returns:

    • (Boolean) 



# File 'time.c'

static VALUE
time_isdst(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    MAKE_TM(time, tobj);
    return tobj->vtm.isdst ? Qtrue : Qfalse;
}

#localtime ⇒ Time #localtime(utc_offset) ⇒ Time

Converts time to local time (using the local time zone in effect for this process) modifying the receiver.

If utc_offset is given, it is used instead of the local time.

t = Time.utc(2000, "jan", 1, 20, 15, 1) #=> 2000-01-01 20:15:01 UTC
t.utc?                                  #=> true

t.localtime                             #=> 2000-01-01 14:15:01 -0600
t.utc?                                  #=> false

t.localtime("+09:00")                   #=> 2000-01-02 05:15:01 +0900
t.utc?                                  #=> false

Overloads:

  • #localtime ⇒ Time

    Returns:

  • #localtime(utc_offset) ⇒ Time

    Returns:




# File 'time.c'

static VALUE
time_localtime_m(int argc, VALUE *argv, VALUE time)
{
VALUE off;
rb_scan_args(argc, argv, "01", &off);

if (!NIL_P(off)) {
    off = utc_offset_arg(off);
    validate_utc_offset(off);

    time_set_utc_offset(time, off);
    return time_fixoff(time);
}

#marshal_dump ⇒ Object

undocumented




# File 'time.c'

static VALUE
time_mdump(VALUE time)
{
struct time_object *tobj;
unsigned long p, s;
char buf[8];
int i;
VALUE str;

struct vtm vtm;
long year;
long usec, nsec;
VALUE subsecx, nano, subnano, v;

GetTimeval(time, tobj);

gmtimew(tobj->timew, &vtm);

if (FIXNUM_P(vtm.year)) {
    year = FIX2LONG(vtm.year);
    if (year < 1900 || 1900+0xffff < year)
        rb_raise(rb_eArgError, "year too big to marshal: %ld UTC", year);
}

#marshal_load ⇒ Object

undocumented




# File 'time.c'

static VALUE
time_mload(VALUE time, VALUE str)
{
struct time_object *tobj;
unsigned long p, s;
time_t sec;
long usec;
unsigned char *buf;
struct vtm vtm;
int i, gmt;
long nsec;
VALUE submicro, nano_num, nano_den, offset;
wideval_t timew;
st_data_t data;

time_modify(time);

#define get_attr(attr, iffound) \
attr = rb_attr_get(str, id_##attr); \
if (!NIL_P(attr)) { \
data = id_##attr; \
iffound; \
    st_delete(rb_generic_ivar_table(str), &data, 0); \
}

#day ⇒ Fixnum #mday ⇒ Fixnum

Returns the day of the month (1..n) for time.

t = Time.now   #=> 2007-11-19 08:27:03 -0600
t.day          #=> 19
t.mday         #=> 19

Overloads:




# File 'time.c'

static VALUE
time_mday(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    MAKE_TM(time, tobj);
    return INT2FIX(tobj->vtm.mday);
}

#min ⇒ Fixnum

Returns the minute of the hour (0..59) for time.

t = Time.now   #=> 2007-11-19 08:25:51 -0600
t.min          #=> 25

Returns:




# File 'time.c'

static VALUE
time_min(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    MAKE_TM(time, tobj);
    return INT2FIX(tobj->vtm.min);
}

#mon ⇒ Fixnum #month ⇒ Fixnum

Returns the month of the year (1..12) for time.

t = Time.now   #=> 2007-11-19 08:27:30 -0600
t.mon          #=> 11
t.month        #=> 11

Overloads:




# File 'time.c'

static VALUE
time_mon(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    MAKE_TM(time, tobj);
    return INT2FIX(tobj->vtm.mon);
}

#monday? ⇒ Boolean

Returns true if time represents Monday.

t = Time.local(2003, 8, 4)       #=> 2003-08-04 00:00:00 -0500
p t.monday?                      #=> true

Returns:

  • (Boolean) 



# File 'time.c'

static VALUE
time_monday(VALUE time)
{
    wday_p(1);
}

#mon ⇒ Fixnum #month ⇒ Fixnum

Returns the month of the year (1..12) for time.

t = Time.now   #=> 2007-11-19 08:27:30 -0600
t.mon          #=> 11
t.month        #=> 11

Overloads:




# File 'time.c'

static VALUE
time_mon(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    MAKE_TM(time, tobj);
    return INT2FIX(tobj->vtm.mon);
}

#nsec ⇒ Integer #tv_nsec ⇒ Integer

Returns just the number of nanoseconds for time.

t = Time.now        #=> 2007-11-17 15:18:03 +0900
"%10.9f" % t.to_f   #=> "1195280283.536151409"
t.nsec              #=> 536151406

The lowest digit of to_f and nsec is different because IEEE 754 double is not accurate enough to represent nanoseconds from the Epoch. The accurate value is returned by nsec.

Overloads:




# File 'time.c'

static VALUE
time_nsec(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    return rb_to_int(w2v(wmulquoll(wmod(tobj->timew, WINT2WV(TIME_SCALE)), 1000000000, TIME_SCALE)));
}

#round([ndigits]) ⇒ Time

Rounds sub seconds to a given precision in decimal digits (0 digits by default). It returns a new time object. ndigits should be zero or positive integer.

require 'time'

t = Time.utc(2010,3,30, 5,43,"25.123456789".to_r)
p t.iso8601(10)           #=> "2010-03-30T05:43:25.1234567890Z"
p t.round.iso8601(10)     #=> "2010-03-30T05:43:25.0000000000Z"
p t.round(0).iso8601(10)  #=> "2010-03-30T05:43:25.0000000000Z"
p t.round(1).iso8601(10)  #=> "2010-03-30T05:43:25.1000000000Z"
p t.round(2).iso8601(10)  #=> "2010-03-30T05:43:25.1200000000Z"
p t.round(3).iso8601(10)  #=> "2010-03-30T05:43:25.1230000000Z"
p t.round(4).iso8601(10)  #=> "2010-03-30T05:43:25.1235000000Z"
p t.round(5).iso8601(10)  #=> "2010-03-30T05:43:25.1234600000Z"
p t.round(6).iso8601(10)  #=> "2010-03-30T05:43:25.1234570000Z"
p t.round(7).iso8601(10)  #=> "2010-03-30T05:43:25.1234568000Z"
p t.round(8).iso8601(10)  #=> "2010-03-30T05:43:25.1234567900Z"
p t.round(9).iso8601(10)  #=> "2010-03-30T05:43:25.1234567890Z"
p t.round(10).iso8601(10) #=> "2010-03-30T05:43:25.1234567890Z"

t = Time.utc(1999,12,31, 23,59,59)
p((t + 0.4).round.iso8601(3))    #=> "1999-12-31T23:59:59.000Z"
p((t + 0.49).round.iso8601(3))   #=> "1999-12-31T23:59:59.000Z"
p((t + 0.5).round.iso8601(3))    #=> "2000-01-01T00:00:00.000Z"
p((t + 1.4).round.iso8601(3))    #=> "2000-01-01T00:00:00.000Z"
p((t + 1.49).round.iso8601(3))   #=> "2000-01-01T00:00:00.000Z"
p((t + 1.5).round.iso8601(3))    #=> "2000-01-01T00:00:01.000Z"

t = Time.utc(1999,12,31, 23,59,59)
p (t + 0.123456789).round(4).iso8601(6)  #=> "1999-12-31T23:59:59.123500Z"

Returns:




# File 'time.c'

static VALUE
time_round(int argc, VALUE *argv, VALUE time)
{
VALUE ndigits, v, a, b, den;
long nd;
struct time_object *tobj;

rb_scan_args(argc, argv, "01", &ndigits);

if (NIL_P(ndigits))
    ndigits = INT2FIX(0);
else
    ndigits = rb_to_int(ndigits);

nd = NUM2LONG(ndigits);
if (nd < 0)
rb_raise(rb_eArgError, "negative ndigits given");

GetTimeval(time, tobj);
v = w2v(rb_time_unmagnify(tobj->timew));

a = INT2FIX(1);
b = INT2FIX(10);
while (0 < nd) {
    if (nd & 1)
        a = mul(a, b);
    b = mul(b, b);
    nd = nd >> 1;
}

#saturday? ⇒ Boolean

Returns true if time represents Saturday.

t = Time.local(2006, 6, 10)      #=> 2006-06-10 00:00:00 -0500
t.saturday?                      #=> true

Returns:

  • (Boolean) 



# File 'time.c'

static VALUE
time_saturday(VALUE time)
{
    wday_p(6);
}

#sec ⇒ Fixnum

Returns the second of the minute (0..60)[Yes, seconds really can range from zero to 60. This allows the system to inject leap seconds every now and then to correct for the fact that years are not really a convenient number of hours long.] for time.

t = Time.now   #=> 2007-11-19 08:25:02 -0600
t.sec          #=> 2

Returns:




# File 'time.c'

static VALUE
time_sec(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    MAKE_TM(time, tobj);
    return INT2FIX(tobj->vtm.sec);
}

#strftime(string) ⇒ String

Formats time according to the directives in the given format string. The directives begins with a percent (%) character. Any text not listed as a directive will be passed through to the output string.

The directive consists of a percent (%) character, zero or more flags, optional minimum field width, optional modifier and a conversion specifier as follows.

%<flags><width><modifier><conversion>

Flags:

-  don't pad a numerical output.
_  use spaces for padding.
0  use zeros for padding.
^  upcase the result string.
#  change case.
:  use colons for %z.

The minimum field width specifies the minimum width.

The modifier is "E" and "O". They are ignored.

Format directives:

Date (Year, Month, Day):
  %Y - Year with century (can be negative, 4 digits at least)
          -0001, 0000, 1995, 2009, 14292, etc.
  %C - year / 100 (round down.  20 in 2009)
  %y - year % 100 (00..99)

  %m - Month of the year, zero-padded (01..12)
          %_m  blank-padded ( 1..12)
          %-m  no-padded (1..12)
  %B - The full month name (``January'')
          %^B  uppercased (``JANUARY'')
  %b - The abbreviated month name (``Jan'')
          %^b  uppercased (``JAN'')
  %h - Equivalent to %b

  %d - Day of the month, zero-padded (01..31)
          %-d  no-padded (1..31)
  %e - Day of the month, blank-padded ( 1..31)

  %j - Day of the year (001..366)

Time (Hour, Minute, Second, Subsecond):
  %H - Hour of the day, 24-hour clock, zero-padded (00..23)
  %k - Hour of the day, 24-hour clock, blank-padded ( 0..23)
  %I - Hour of the day, 12-hour clock, zero-padded (01..12)
  %l - Hour of the day, 12-hour clock, blank-padded ( 1..12)
  %P - Meridian indicator, lowercase (``am'' or ``pm'')
  %p - Meridian indicator, uppercase (``AM'' or ``PM'')

  %M - Minute of the hour (00..59)

  %S - Second of the minute (00..60)

  %L - Millisecond of the second (000..999)
  %N - Fractional seconds digits, default is 9 digits (nanosecond)
          %3N  millisecond (3 digits)
          %6N  microsecond (6 digits)
          %9N  nanosecond (9 digits)
          %12N picosecond (12 digits)

Time zone:
  %z - Time zone as hour and minute offset from UTC (e.g. +0900)
          %:z - hour and minute offset from UTC with a colon (e.g. +09:00)
          %::z - hour, minute and second offset from UTC (e.g. +09:00:00)
  %Z - Time zone abbreviation name

Weekday:
  %A - The full weekday name (``Sunday'')
          %^A  uppercased (``SUNDAY'')
  %a - The abbreviated name (``Sun'')
          %^a  uppercased (``SUN'')
  %u - Day of the week (Monday is 1, 1..7)
  %w - Day of the week (Sunday is 0, 0..6)

ISO 8601 week-based year and week number:
The week 1 of YYYY starts with a Monday and includes YYYY-01-04.
The days in the year before the first week are in the last week of
the previous year.
  %G - The week-based year
  %g - The last 2 digits of the week-based year (00..99)
  %V - Week number of the week-based year (01..53)

Week number:
The week 1 of YYYY starts with a Sunday or Monday (according to %U
or %W).  The days in the year before the first week are in week 0.
  %U - Week number of the year.  The week starts with Sunday.  (00..53)
  %W - Week number of the year.  The week starts with Monday.  (00..53)

Seconds since the Epoch:
  %s - Number of seconds since 1970-01-01 00:00:00 UTC.

Literal string:
  %n - Newline character (\n)
  %t - Tab character (\t)
  %% - Literal ``%'' character

Combination:
  %c - date and time (%a %b %e %T %Y)
  %D - Date (%m/%d/%y)
  %F - The ISO 8601 date format (%Y-%m-%d)
  %v - VMS date (%e-%^b-%4Y)
  %x - Same as %D
  %X - Same as %T
  %r - 12-hour time (%I:%M:%S %p)
  %R - 24-hour time (%H:%M)
  %T - 24-hour time (%H:%M:%S)

This method is similar to strftime() function defined in ISO C and POSIX. Several directives (%a, %A, %b, %B, %c, %p, %r, %x, %X, %E*, %O* and %Z) are locale dependent in the function. However this method is locale independent since Ruby 1.9. So, the result may differ even if a same format string is used in other systems such as C. It is good practice to avoid %x and %X because there are corresponding locale independent representations, %D and %T.

Examples:

t = Time.new(2007,11,19,8,37,48,"-06:00") #=> 2007-11-19 08:37:48 -0600
t.strftime("Printed on %m/%d/%Y")   #=> "Printed on 11/19/2007"
t.strftime("at %I:%M%p")            #=> "at 08:37AM"

Various ISO 8601 formats:

%Y%m%d           => 20071119                  Calendar date (basic)
%F               => 2007-11-19                Calendar date (extended)
%Y-%m            => 2007-11                   Calendar date, reduced accuracy, specific month
%Y               => 2007                      Calendar date, reduced accuracy, specific year
%C               => 20                        Calendar date, reduced accuracy, specific century
%Y%j             => 2007323                   Ordinal date (basic)
%Y-%j            => 2007-323                  Ordinal date (extended)
%GW%V%u          => 2007W471                  Week date (basic)
%G-W%V-%u        => 2007-W47-1                Week date (extended)
%GW%V            => 2007W47                   Week date, reduced accuracy, specific week (basic)
%G-W%V           => 2007-W47                  Week date, reduced accuracy, specific week (extended)
%H%M%S           => 083748                    Local time (basic)
%T               => 08:37:48                  Local time (extended)
%H%M             => 0837                      Local time, reduced accuracy, specific minute (basic)
%H:%M            => 08:37                     Local time, reduced accuracy, specific minute (extended)
%H               => 08                        Local time, reduced accuracy, specific hour
%H%M%S,%L        => 083748,000                Local time with decimal fraction, comma as decimal sign (basic)
%T,%L            => 08:37:48,000              Local time with decimal fraction, comma as decimal sign (extended)
%H%M%S.%L        => 083748.000                Local time with decimal fraction, full stop as decimal sign (basic)
%T.%L            => 08:37:48.000              Local time with decimal fraction, full stop as decimal sign (extended)
%H%M%S%z         => 083748-0600               Local time and the difference from UTC (basic)
%T%:z            => 08:37:48-06:00            Local time and the difference from UTC (extended)
%Y%m%dT%H%M%S%z  => 20071119T083748-0600      Date and time of day for calendar date (basic)
%FT%T%:z         => 2007-11-19T08:37:48-06:00 Date and time of day for calendar date (extended)
%Y%jT%H%M%S%z    => 2007323T083748-0600       Date and time of day for ordinal date (basic)
%Y-%jT%T%:z      => 2007-323T08:37:48-06:00   Date and time of day for ordinal date (extended)
%GW%V%uT%H%M%S%z => 2007W471T083748-0600      Date and time of day for week date (basic)
%G-W%V-%uT%T%:z  => 2007-W47-1T08:37:48-06:00 Date and time of day for week date (extended)
%Y%m%dT%H%M      => 20071119T0837             Calendar date and local time (basic)
%FT%R            => 2007-11-19T08:37          Calendar date and local time (extended)
%Y%jT%H%MZ       => 2007323T0837Z             Ordinal date and UTC of day (basic)
%Y-%jT%RZ        => 2007-323T08:37Z           Ordinal date and UTC of day (extended)
%GW%V%uT%H%M%z   => 2007W471T0837-0600        Week date and local time and difference from UTC (basic)
%G-W%V-%uT%R%:z  => 2007-W47-1T08:37-06:00    Week date and local time and difference from UTC (extended)

Returns:




# File 'time.c'

static VALUE
time_strftime(VALUE time, VALUE format)
{
struct time_object *tobj;
char buffer[SMALLBUF], *buf = buffer;
const char *fmt;
long len;
VALUE str;

GetTimeval(time, tobj);
MAKE_TM(time, tobj);
StringValue(format);
if (!rb_enc_str_asciicompat_p(format)) {
rb_raise(rb_eArgError, "format should have ASCII compatible encoding");
}

#subsec ⇒ Numeric

Returns just the fraction for time.

The result is possibly rational.

t = Time.now        #=> 2009-03-26 22:33:12 +0900
"%10.9f" % t.to_f   #=> "1238074392.940563917"
t.subsec            #=> (94056401/100000000)

The lowest digit of to_f and subsec is different because IEEE 754 double is not accurate enough to represent the rational. The accurate value is returned by subsec.

Returns:




# File 'time.c'

static VALUE
time_subsec(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    return quo(w2v(wmod(tobj->timew, WINT2FIXWV(TIME_SCALE))), INT2FIX(TIME_SCALE));
}

#succ ⇒ Object

#sunday? ⇒ Boolean

Returns true if time represents Sunday.

t = Time.local(1990, 4, 1)       #=> 1990-04-01 00:00:00 -0600
t.sunday?                        #=> true

Returns:

  • (Boolean) 



# File 'time.c'

static VALUE
time_sunday(VALUE time)
{
    wday_p(0);
}

#thursday? ⇒ Boolean

Returns true if time represents Thursday.

t = Time.local(1995, 12, 21)     #=> 1995-12-21 00:00:00 -0600
p t.thursday?                    #=> true

Returns:

  • (Boolean) 



# File 'time.c'

static VALUE
time_thursday(VALUE time)
{
    wday_p(4);
}

#to_a ⇒ Array

Returns a ten-element array of values for time: sec, min, hour, day, month, year, wday, yday, isdst, zone ]. See the individual methods for an explanation of the valid ranges of each value. The ten elements can be passed directly to Time::utc or Time::local to create a new Time.

t = Time.now     #=> 2007-11-19 08:36:01 -0600
now = t.to_a     #=> [1, 36, 8, 19, 11, 2007, 1, 323, false, "CST"]

Returns:




# File 'time.c'

static VALUE
time_to_a(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    MAKE_TM(time, tobj);
    return rb_ary_new3(10,
            INT2FIX(tobj->vtm.sec),
            INT2FIX(tobj->vtm.min),
            INT2FIX(tobj->vtm.hour),
            INT2FIX(tobj->vtm.mday),
            INT2FIX(tobj->vtm.mon),
            tobj->vtm.year,
            INT2FIX(tobj->vtm.wday),
            INT2FIX(tobj->vtm.yday),
            tobj->vtm.isdst?Qtrue:Qfalse,
            time_zone(time));
}

#to_f ⇒ Float

Returns the value of time as a floating point number of seconds since the Epoch.

t = Time.now
"%10.5f" % t.to_f   #=> "1270968744.77658"
t.to_i              #=> 1270968744

Note that IEEE 754 double is not accurate enough to represent number of nanoseconds from the Epoch.

Returns:




# File 'time.c'

static VALUE
time_to_f(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    return rb_Float(rb_time_unmagnify_to_float(tobj->timew));
}

#to_i ⇒ Integer #tv_sec ⇒ Integer

Returns the value of time as an integer number of seconds since the Epoch.

t = Time.now
"%10.5f" % t.to_f   #=> "1270968656.89607"
t.to_i              #=> 1270968656

Overloads:




# File 'time.c'

static VALUE
time_to_i(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    return w2v(wdiv(tobj->timew, WINT2FIXWV(TIME_SCALE)));
}

#to_r ⇒ Object

Returns the value of time as a rational number of seconds since the Epoch.

t = Time.now
p t.to_r            #=> (1270968792716287611/1000000000)

This methods is intended to be used to get an accurate value representing nanoseconds from the Epoch. You can use this to convert time to another Epoch.




# File 'time.c'

static VALUE
time_to_r(VALUE time)
{
struct time_object *tobj;
VALUE v;

GetTimeval(time, tobj);
v = w2v(rb_time_unmagnify(tobj->timew));
if (TYPE(v) != T_RATIONAL) {
    v = rb_Rational1(v);
}

#inspect ⇒ String #to_s ⇒ String

Returns a string representing time. Equivalent to calling Time#strftime with a format string of "%Y-%m-%d %H:%M:%S %z" for a local time and "%Y-%m-%d %H:%M:%S UTC" for a UTC time.

Time.now.to_s       #=> "2007-10-05 16:09:51 +0900"
Time.now.utc.to_s   #=> "2007-10-05 07:09:51 UTC"

Overloads:




# File 'time.c'

static VALUE
time_to_s(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (TIME_UTC_P(tobj))
        return strftimev("%Y-%m-%d %H:%M:%S UTC", time);
    else
        return strftimev("%Y-%m-%d %H:%M:%S %z", time);
}

#tuesday? ⇒ Boolean

Returns true if time represents Tuesday.

t = Time.local(1991, 2, 19)      #=> 1991-02-19 00:00:00 -0600
p t.tuesday?                     #=> true

Returns:

  • (Boolean) 



# File 'time.c'

static VALUE
time_tuesday(VALUE time)
{
    wday_p(2);
}

#nsec ⇒ Integer #tv_nsec ⇒ Integer

Returns just the number of nanoseconds for time.

t = Time.now        #=> 2007-11-17 15:18:03 +0900
"%10.9f" % t.to_f   #=> "1195280283.536151409"
t.nsec              #=> 536151406

The lowest digit of to_f and nsec is different because IEEE 754 double is not accurate enough to represent nanoseconds from the Epoch. The accurate value is returned by nsec.

Overloads:




# File 'time.c'

static VALUE
time_nsec(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    return rb_to_int(w2v(wmulquoll(wmod(tobj->timew, WINT2WV(TIME_SCALE)), 1000000000, TIME_SCALE)));
}

#to_i ⇒ Integer #tv_sec ⇒ Integer

Returns the value of time as an integer number of seconds since the Epoch.

t = Time.now
"%10.5f" % t.to_f   #=> "1270968656.89607"
t.to_i              #=> 1270968656

Overloads:




# File 'time.c'

static VALUE
time_to_i(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    return w2v(wdiv(tobj->timew, WINT2FIXWV(TIME_SCALE)));
}

#usec ⇒ Integer #tv_usec ⇒ Integer

Returns just the number of microseconds for time.

t = Time.now        #=> 2007-11-19 08:03:26 -0600
"%10.6f" % t.to_f   #=> "1195481006.775195"
t.usec              #=> 775195

Overloads:




# File 'time.c'

static VALUE
time_usec(VALUE time)
{
    struct time_object *tobj;
    wideval_t w, q, r;

    GetTimeval(time, tobj);

    w = wmod(tobj->timew, WINT2WV(TIME_SCALE));
    wmuldivmod(w, WINT2FIXWV(1000000), WINT2FIXWV(TIME_SCALE), &q, &r);
    return rb_to_int(w2v(q));
}

#usec ⇒ Integer #tv_usec ⇒ Integer

Returns just the number of microseconds for time.

t = Time.now        #=> 2007-11-19 08:03:26 -0600
"%10.6f" % t.to_f   #=> "1195481006.775195"
t.usec              #=> 775195

Overloads:




# File 'time.c'

static VALUE
time_usec(VALUE time)
{
    struct time_object *tobj;
    wideval_t w, q, r;

    GetTimeval(time, tobj);

    w = wmod(tobj->timew, WINT2WV(TIME_SCALE));
    wmuldivmod(w, WINT2FIXWV(1000000), WINT2FIXWV(TIME_SCALE), &q, &r);
    return rb_to_int(w2v(q));
}

#gmtime ⇒ Time #utc ⇒ Time

Converts time to UTC (GMT), modifying the receiver.

t = Time.now   #=> 2007-11-19 08:18:31 -0600
t.gmt?         #=> false
t.gmtime       #=> 2007-11-19 14:18:31 UTC
t.gmt?         #=> true

t = Time.now   #=> 2007-11-19 08:18:51 -0600
t.utc?         #=> false
t.utc          #=> 2007-11-19 14:18:51 UTC
t.utc?         #=> true

Overloads:




# File 'time.c'

static VALUE
time_gmtime(VALUE time)
{
struct time_object *tobj;
struct vtm vtm;

GetTimeval(time, tobj);
if (TIME_UTC_P(tobj)) {
if (tobj->tm_got)
    return time;
}

#utc? ⇒ Boolean #gmt? ⇒ Boolean

Returns true if time represents a time in UTC (GMT).

t = Time.now                        #=> 2007-11-19 08:15:23 -0600
t.utc?                              #=> false
t = Time.gm(2000,"jan",1,20,15,1)   #=> 2000-01-01 20:15:01 UTC
t.utc?                              #=> true

t = Time.now                        #=> 2007-11-19 08:16:03 -0600
t.gmt?                              #=> false
t = Time.gm(2000,1,1,20,15,1)       #=> 2000-01-01 20:15:01 UTC
t.gmt?                              #=> true

Overloads:

  • #utc? ⇒ Boolean

    Returns:

    • (Boolean)
  • #gmt? ⇒ Boolean

    Returns:

    • (Boolean) 



# File 'time.c'

static VALUE
time_utc_p(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (TIME_UTC_P(tobj)) return Qtrue;
    return Qfalse;
}

#gmt_offset ⇒ Fixnum #gmtoff ⇒ Fixnum #utc_offset ⇒ Fixnum

Returns the offset in seconds between the timezone of time and UTC.

t = Time.gm(2000,1,1,20,15,1)   #=> 2000-01-01 20:15:01 UTC
t.gmt_offset                    #=> 0
l = t.getlocal                  #=> 2000-01-01 14:15:01 -0600
l.gmt_offset                    #=> -21600

Overloads:




# File 'time.c'

static VALUE
time_utc_offset(VALUE time)
{
struct time_object *tobj;

GetTimeval(time, tobj);
MAKE_TM(time, tobj);

if (TIME_UTC_P(tobj)) {
return INT2FIX(0);
}

#wday ⇒ Fixnum

Returns an integer representing the day of the week, 0..6, with Sunday == 0.

t = Time.now   #=> 2007-11-20 02:35:35 -0600
t.wday         #=> 2
t.sunday?      #=> false
t.monday?      #=> false
t.tuesday?     #=> true
t.wednesday?   #=> false
t.thursday?    #=> false
t.friday?      #=> false
t.saturday?    #=> false

Returns:




# File 'time.c'

static VALUE
time_wday(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    MAKE_TM(time, tobj);
    return INT2FIX(tobj->vtm.wday);
}

#wednesday? ⇒ Boolean

Returns true if time represents Wednesday.

t = Time.local(1993, 2, 24)      #=> 1993-02-24 00:00:00 -0600
p t.wednesday?                   #=> true

Returns:

  • (Boolean) 



# File 'time.c'

static VALUE
time_wednesday(VALUE time)
{
    wday_p(3);
}

#yday ⇒ Fixnum

Returns an integer representing the day of the year, 1..366.

t = Time.now   #=> 2007-11-19 08:32:31 -0600
t.yday         #=> 323

Returns:




# File 'time.c'

static VALUE
time_yday(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    MAKE_TM(time, tobj);
    return INT2FIX(tobj->vtm.yday);
}

#year ⇒ Fixnum

Returns the year for time (including the century).

t = Time.now   #=> 2007-11-19 08:27:51 -0600
t.year         #=> 2007

Returns:




# File 'time.c'

static VALUE
time_year(VALUE time)
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    MAKE_TM(time, tobj);
    return tobj->vtm.year;
}

#zone ⇒ String

Returns the name of the time zone used for time. As of Ruby 1.8, returns "UTC" rather than "GMT" for UTC times.

t = Time.gm(2000, "jan", 1, 20, 15, 1)
t.zone   #=> "UTC"
t = Time.local(2000, "jan", 1, 20, 15, 1)
t.zone   #=> "CST"

Returns:




# File 'time.c'

static VALUE
time_zone(VALUE time)
{
struct time_object *tobj;

GetTimeval(time, tobj);
MAKE_TM(time, tobj);

if (TIME_UTC_P(tobj)) {
return rb_obj_untaint(rb_locale_str_new_cstr("UTC"));
}