method

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v1_8_7_330 - Show latest stable - 0 notes - Class: Time

-(p1) public

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       #=> Wed Apr 09 08:56:03 CDT 2003
t2 = t + 2592000   #=> Fri May 09 08:56:03 CDT 2003
t2 - t             #=> 2592000.0
t2 - 2592000       #=> Wed Apr 09 08:56:03 CDT 2003

Show source

/*
 *  call-seq:
 *     time - other_time => float
 *     time - numeric    => time
 *  
 *  Difference---Returns a new time that represents the difference
 *  between two times, or subtracts the given number of seconds in
 *  <i>numeric</i> from <i>time</i>.
 *     
 *     t = Time.now       #=> Wed Apr 09 08:56:03 CDT 2003
 *     t2 = t + 2592000   #=> Fri May 09 08:56:03 CDT 2003
 *     t2 - t             #=> 2592000.0
 *     t2 - 2592000       #=> Wed Apr 09 08:56:03 CDT 2003
 */

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

    GetTimeval(time1, tobj);
    if (TYPE(time2) == T_DATA && RDATA(time2)->dfree == time_free) {
        struct time_object *tobj2;
        double f;

        GetTimeval(time2, tobj2);
        f = (double)tobj->tv.tv_sec - (double)tobj2->tv.tv_sec;
        f += ((double)tobj->tv.tv_usec - (double)tobj2->tv.tv_usec)*1e-6;
        /* XXX: should check float overflow on 64bit time_t platforms */

        return rb_float_new(f);
    }
    return time_add(tobj, time2, -1);
}

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