WithinPastDays

Check whether two TDateTimes are only a number of days apart

Declaration

Source position: dateutil.inc line 246

  function WithinPastDays(const ANow: TDateTime; const AThen: TDateTime; 
                         const ADays: Integer) : Boolean;

Description

WithinPastDays compares the timestamps ANow and AThen and returns True if the difference between them is at most ADays days apart, or False if they are further apart.

Remark

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

See also

Name	Description
WithinPastHours	Check whether two TDateTimes are only a number of hours apart
WithinPastMilliSeconds	Check whether two TDateTimes are only a number of milliseconds apart
WithinPastMinutes	Check whether two TDateTimes are only a number of minutes apart
WithinPastMonths	Check whether two TDateTimes are only a number of months apart
WithinPastSeconds	Check whether two TDateTimes are only a number of seconds apart
WithinPastWeeks	Check whether two TDateTimes are only a number of weeks apart
WithinPastYears	Check whether two TDateTimes are only a number of years apart

Example

Program Example50;
{ This program demonstrates the WithinPastDays function }
Uses SysUtils,DateUtils;
Procedure Test(ANow,AThen : TDateTime; ADays : Integer);
begin
 Write(DateTimeToStr(AThen),' and ',DateTimeToStr(ANow));
 Write(' are within ',ADays,' days: ');
 Writeln(WithinPastDays(ANow,AThen,ADays));
end;
Var
  D1,D2 : TDateTime;
Begin
  D1:=Now;
  D2:=Today-23/24;
  Test(D1,D2,1);
  D2:=Today-1;
  Test(D1,D2,1);
  D2:=Today-25/24;
  Test(D1,D2,1);
  D2:=Today-26/24;
  Test(D1,D2,5);
  D2:=Today-5.4;
  Test(D1,D2,5);
  D2:=Today-2.5;
  Test(D1,D2,1);
  Test(D1,D2,2);
  Test(D1,D2,3);
End.