static void Main()
{
Date dateMoonWalk = new Date();
Console.WriteLine("Moon walk: {0}, Day of Year: {1}",
dateMoonWalk, dateMoonWalk.DayOfYear());
}
public void DayOfYear()
{
// AA2, p.65, ex. 7.f
Assert.AreEqual(318, Date.DayOfYear(new Date(1978, 11, 14)));
// AA2, p.65, ex. 7.g
Assert.AreEqual(113, Date.DayOfYear(new Date(1988, 4, 22)));
}
public static void Main()
{
Date mydate = new Date();
mydate.month = 8;
mydate.day = 29;
mydate.year = 2001;
Console.WriteLine("Day of year = {0}", mydate.DayOfYear());
}
public ICollection <Meteor> Read(string filePath)
{
var ci = CultureInfo.InvariantCulture;
List <Meteor> meteors = new List <Meteor>();
using (var sr = new StreamReader(new FileStream(filePath, FileMode.Open, FileAccess.Read)))
{
string line = "";
while ((line = sr.ReadLine()) != null)
{
string code = line.Substring(0, 3);
string name = line.Substring(4, 21);
string[] begin = line.Substring(25, 5).Split('/');
string[] end = line.Substring(33, 5).Split('/');
string[] max = line.Substring(39, 5).Split('/');
string zhr = line.Substring(88, 3).Trim();
string activityClass = line.Substring(92, 1);
short beginDay = (short)Date.DayOfYear(new Date(2001, int.Parse(begin[1]), int.Parse(begin[0])));
short endDay = (short)Date.DayOfYear(new Date(2001, int.Parse(end[1]), int.Parse(end[0])));
short maxDay = (short)Date.DayOfYear(new Date(2001, int.Parse(max[1]), int.Parse(max[0])));
if (beginDay > endDay)
{
beginDay -= 365;
}
if (maxDay > endDay)
{
maxDay -= 365;
}
double ra = double.Parse(line.Substring(52, 5), ci);
double dec = double.Parse(line.Substring(58, 5), ci);
double dRa = double.Parse(line.Substring(63, 7), ci);
double dDec = double.Parse(line.Substring(70, 7), ci);
var meteor = new Meteor()
{
Code = code,
Name = name.Trim(),
Begin = beginDay,
End = endDay,
Max = maxDay,
Equatorial0 = new CrdsEquatorial(ra, dec),
Drift = new CrdsEquatorial(dRa, dDec),
ZHR = zhr,
ActivityClass = int.Parse(activityClass)
};
meteors.Add(meteor);
}
}
return(meteors);
}
static void Main()
{
Date dateMoonWalk = new Date();
dateMoonWalk.iYear = 1969;
dateMoonWalk.iMonth = 7;
dateMoonWalk.iDay = 20;
Console.WriteLine("Moon walk: {0}, Day of Year: {1}",
dateMoonWalk, dateMoonWalk.DayOfYear());
}
public void DayOfYear_ShouldReturnExpectedResult_ForToday()
{
// Arrange
var dayOfYearToday = DateTime.UtcNow.DayOfYear;
// Act
var snippetResult = Date.DayOfYear();
// Assert
snippetResult.Should().Be(dayOfYearToday);
}
static void Main()
{
Date dateMoonWalk = new Date();
dateMoonWalk.Year = 1969;
dateMoonWalk.Month = 7;
dateMoonWalk.Day = 20;
Console.WriteLine("Moon walk: {0}, Day of Year: {1}",
dateMoonWalk, dateMoonWalk.DayOfYear());
}
static void Main()
{
Date dateMoonWalk = new Date();
dateMoonWalk.iYear = 1969;
dateMoonWalk.iMonth = 7;
dateMoonWalk.iDay = 20;
Console.WriteLine("Moon walk: {0}/{1}/{2} Day of Year: {3}",
dateMoonWalk.iMonth, dateMoonWalk.iDay, dateMoonWalk.iYear,
Date.DayOfYear(dateMoonWalk));
}
/// <summary>
/// 两个日期的差，以年为单位
/// </summary>
/// <param name="startDate">开始日</param>
/// <param name="endDate">结束日</param>
/// <param name="referenceStartDate">参考开始日</param>
/// <param name="referenceEndDate">参考结束日</param>
/// <returns>日期差</returns>
public double CalcDayCountFraction(Date startDate, Date endDate, Date referenceStartDate, Date referenceEndDate)
{
var startYear = startDate.Year;
var endYear = endDate.Year;
if (startYear == endYear)
{
return((endDate - startDate) / Date.DaysInYear(startYear));
}
var s = 1.0 - 1.0 * (startDate.DayOfYear() - 1) / Date.DaysInYear(startYear);
var e = 1.0 * (endDate.DayOfYear() - 1) / Date.DaysInYear(endYear);
return(s + e + (endYear - startYear - 1));
}
/// <summary>
/// 通过基准日期和日期差，计算目标日期
/// </summary>
/// <param name="startDate">基准日期</param>
/// <param name="dayCountFraction">日期差</param>
/// <param name="referenceStartDate">参考开始日</param>
/// <param name="referenceEndDate">参考结束日</param>
/// <returns>目标日期</returns>
public Date CalcEndDateFromDayCountFraction(Date startDate, double dayCountFraction, Date referenceStartDate, Date referenceEndDate)
{
if (dayCountFraction <= 1.0)
{
var days = Convert.ToInt16(Date.DaysInYear(startDate.Year) * dayCountFraction);
return(startDate.AddDays(days));
}
else
{
var guessEndDate = startDate.AddDays(Convert.ToInt16(dayCountFraction * 365.0));
var startYear = startDate.Year;
var endYear = guessEndDate.Year;
var s = 1.0 - 1.0 * (startDate.DayOfYear() - 1) / Date.DaysInYear(startYear);
var actualEndDcf = dayCountFraction - s - (endYear - startYear - 1);
var actualEndDayOfYear = actualEndDcf * Date.DaysInYear(endYear) + 1.0;
var endDayDiff = actualEndDayOfYear - guessEndDate.DayOfYear();
return(guessEndDate.AddDays(Convert.ToInt16(endDayDiff)));
}
}
private int DayOfYear(SkyContext ctx)
{
var date = new Date(ctx.JulianDay);
return(Date.DayOfYear(date));
}
