WithinPastSeconds

Check whether two datetimes are only a number of seconds apart

Declaration

Source position: dateutil.inc line 247

function WithinPastSeconds(

const ANow: TDateTime;

const AThen: TDateTime;

const ASeconds: Int64

):Boolean;

Arguments

`ANow`		First moment in time
`AThen`		Second moment in time
`ASeconds`		Number of seconds to check

Function result

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

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

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
WithinPastHours		Check whether two datetimes are only a number of hours apart
WithinPastMinutes		Check whether two datetimes are only a number of minutes apart
WithinPastMilliSeconds		Check whether two datetimes are only a number of milliseconds 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.

Notes

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