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

WithinPastWeeks

Check whether two datetimes are only a number of weeks apart

Declaration

Source position: dateutil.inc line 245

 function WithinPastWeeks( const ANow: TDateTime; const AThen: TDateTime; const AWeeks: Integer ):Boolean;

Arguments

 ANow First moment in time AThen Second moment in time AWeeks Number of weeks to check

Function result

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

Description

WithinPastWeeks compares the timestamps ANow and AThen and returns True if the difference between them is at most AWeeks weeks apart, or False if they are further apart.

 Remark: Since this function uses the WeeksBetween function to calculate the difference in Weeks, this means that fractional Weeks do not count, and the fractional part is simply dropped, so for two dates actually 2 and a half weeks 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 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 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 Example49;

{ This program demonstrates the WithinPastWeeks function }

Uses SysUtils,DateUtils;

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

begin
Write(DateToStr(AThen),' and ',DateToStr(ANow));
Write(' are within ',AWeeks,' weeks: ');
Writeln(WithinPastWeeks(ANow,AThen,AWeeks));
end;

Var
D1,D2 : TDateTime;

Begin
D1:=Today;
D2:=Today-7;
Test(D1,D2,1);
D2:=Today-8;
Test(D1,D2,1);
D2:=Today-14;
Test(D1,D2,1);
D2:=Today-35;
Test(D1,D2,5);
D2:=Today-36;
Test(D1,D2,5);
D2:=Today-17;
Test(D1,D2,1);
Test(D1,D2,2);
Test(D1,D2,3);
End.
```