WithinPastHours

Check whether two datetimes are only a number of hours apart

Declaration

Source position: dateutil.inc line 246

function WithinPastHours(

const ANow: TDateTime;

const AThen: TDateTime;

const AHours: Int64

):Boolean;

Arguments

`ANow`		First moment in time
`AThen`		Second moment in time
`AHours`		Number of hours to check

Function result

True if ANow and Athen are only AHours apart, false otherwise

Description

WithinPastHours compares the timestamps ANow and AThen and returns True if the difference between them is at most AHours hours apart, or False if they are further apart.

Remark:

Since this function uses the HoursBetween function to calculate the difference in Hours, this means that fractional hours do not count, and the fractional part is simply dropped, so for two dates actually 2 and a half hours apart, the result will also be True

WithinPastYears		Check whether two datetimes are only a number of years apart
WithinPastMonths		Check whether two datetimes are only a number of months apart
WithinPastWeeks		Check whether two datetimes are only a number of weeks apart
WithinPastDays		Check whether two datetimes are only a number of days apart
WithinPastMinutes		Check whether two datetimes are only a number of minutes apart
WithinPastSeconds		Check whether two datetimes are only a number of seconds apart
WithinPastMilliSeconds		Check whether two datetimes are only a number of milliseconds apart

Example

Program Example51;

{ This program demonstrates the WithinPastHours function }

Uses SysUtils,DateUtils;

Procedure Test(ANow,AThen : TDateTime; AHours : Integer);

begin
 Write(DateTimeToStr(AThen),' and ',DateTimeToStr(ANow));
 Write(' are within ',AHours,' hours: ');
 Writeln(WithinPastHours(ANow,AThen,AHours));
end;

Var
  D1,D2 : TDateTime;

Begin
  D1:=Now;
  D2:=D1-(59*OneMinute);
  Test(D1,D2,1);
  D2:=D1-(61*OneMinute);
  Test(D1,D2,1);
  D2:=D1-(122*OneMinute);
  Test(D1,D2,1);
  D2:=D1-(306*OneMinute);
  Test(D1,D2,5);
  D2:=D1-(5.4*OneHour);
  Test(D1,D2,5);
  D2:=D1-(2.5*OneHour);
  Test(D1,D2,1);
  Test(D1,D2,2);
  Test(D1,D2,3);
End.