[Overview][Constants][Procedures and functions][Index] Reference for unit 'DateUtils' (#rtl)

WithinPastSeconds

Check whether two TDateTimes are only a number of seconds apart

Declaration

Source position: dateutil.inc line 262

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

See also

WithinPastYears

  

Check whether two TDateTimes are only a number of years 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

WithinPastDays

  

Check whether two TDateTimes are only a number of days apart

WithinPastHours

  

Check whether two TDateTimes are only a number of hours apart

WithinPastMinutes

  

Check whether two TDateTimes are only a number of minutes apart

WithinPastMilliSeconds

  

Check whether two TDateTimes 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.

Documentation generated on: May 14 2021