WithinPastSeconds
Check whether two TDateTimes are only a number of seconds apart
Declaration
Source position: dateutil.inc line 249
function WithinPastSeconds(const ANow: TDateTime;
const AThen: TDateTime; const ASeconds: Int64)
: Boolean;
Description
WithinPastSeconds compares the timestamps ANow and AThen and returns True if the difference between them is at most ASeconds seconds apart, or False if they are further apart.
Remark
Since this function uses the SecondsBetween function to calculate the difference in seconds, this means that fractional seconds do not count, and the fractional part is simply dropped, so for two dates actually 2 and a half seconds apart, the result will also be True !!!
See also
| Name | Description |
|---|---|
| WithinPastDays | Check whether two TDateTimes are only a number of days apart |
| 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 |
| 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 Example53;
{ This program demonstrates the WithinPastSeconds function }
Uses SysUtils,DateUtils;
Procedure Test(ANow,AThen : TDateTime; ASeconds : Integer);
begin
Write(DateTimeToStr(AThen),' and ',DateTimeToStr(ANow));
Write(' are within ',ASeconds,' seconds: ');
Writeln(WithinPastSeconds(ANow,AThen,ASeconds));
end;
Var
D1,D2 : TDateTime;
Begin
D1:=Now;
D2:=D1-(999*OneMilliSecond);
Test(D1,D2,1);
D2:=D1-(1001*OneMilliSecond);
Test(D1,D2,1);
D2:=D1-(2001*OneMilliSecond);
Test(D1,D2,1);
D2:=D1-(5001*OneMilliSecond);
Test(D1,D2,5);
D2:=D1-(5.4*OneSecond);
Test(D1,D2,5);
D2:=D1-(2.5*OneSecond);
Test(D1,D2,1);
Test(D1,D2,2);
Test(D1,D2,3);
End.