假设我有3个时间范围:
07:00 - 18:00
18:00 - 23:00
23:00 - 07:00
和代码:
public class TimeShift
{
public TimeSpan Start { get; set; }
public TimeSpan End { get; set; }
}
List<TimeShift> shifts = new List<TimeShift>();
如何检查列表中的每个项目是否在上述3个范围之间以及几个小时之间?
例如一个TimeShift,其中:
Start: 07:00
End: 23:30
那意味着16.5个小时.
对于以上示例:
Range 1: 11 hours
Range 2: 5 hours
Range 3: 0.5 hours
解决方法:
这是一个包含测试的解决方案:
计算
public class TimeSpacCalculator
{
public static TimeSpan GetTimeSpanIntersect(TimeShift input, TimeSpan start, TimeSpan end)
{
// Loopsback input from 23:59 - 00:00
if (input.Start > input.End)
return GetTimeSpanIntersect(new TimeShift(input.Start, TimeSpan.FromHours(24)), start, end) +
GetTimeSpanIntersect(new TimeShift(TimeSpan.FromHours(0), input.End), start, end);
// Loopsback Shift from 23:59 - 00:00
if (start > end)
return GetTimeSpanIntersect(input, new TimeSpan(), end) +
GetTimeSpanIntersect(input, start, TimeSpan.FromHours(24));
if (input.End < start)
return new TimeSpan();
if (input.Start > end)
return new TimeSpan();
var actualStart = input.Start < start
? start
: input.Start;
var actualEnd = input.End > end
? end
: input.End;
return actualEnd - actualStart;
}
}
班级
public class TimeRange : TimeShift
{
public TimeRange(string name, TimeSpan start, TimeSpan end) : base(start, end)
{
Name = name;
}
public string Name { get; set; }
}
public class TimeShift
{
public TimeShift(TimeSpan start, TimeSpan end)
{
Start = start;
End = end;
}
public TimeSpan Start { get; set; }
public TimeSpan End { get; set; }
}
测验
[TestFixture]
internal class TimShiftTests
{
[Test]
[TestCase(7, 23.5, 11, 5, 0.5)]
[TestCase(22, 7.5, 0.5, 1, 8)]
public void Test(double inputStartHours, double inputEndHours, double expectedRange1Hours, double expectedRange2Hours, double expectedRange3Hours )
{
var input = new TimeShift(TimeSpan.FromHours(inputStartHours), TimeSpan.FromHours(inputEndHours));
var ranges = new List<TimeRange>
{
new TimeRange("Range1", TimeSpan.FromHours(7), TimeSpan.FromHours(18)),
new TimeRange("Range2", TimeSpan.FromHours(18), TimeSpan.FromHours(23)),
new TimeRange("Range3", TimeSpan.FromHours(23), TimeSpan.FromHours(7))
};
var result = new Dictionary<string, TimeSpan>();
foreach (var range in ranges)
{
var time = TimeSpacCalculator.GetTimeSpanIntersect(input, range.Start, range.End);
result.Add(range.Name, time);
Console.WriteLine($"{range.Name}: " + time.TotalHours);
}
result["Range1"].Should().Be(TimeSpan.FromHours(expectedRange1Hours));
result["Range2"].Should().Be(TimeSpan.FromHours(expectedRange2Hours));
result["Range3"].Should().Be(TimeSpan.FromHours(expectedRange3Hours));
}