Unit 'DateUtils' Package
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WithinPastHours

Check whether two TDateTimes are only a number of hours apart.

Declaration

Source position: dateutil.inc line 269

function WithinPastHours(

  const ANow: TDateTime;

  const AThen: TDateTime;

  const AHours: Int64

):Boolean;

Arguments

ANow

  

First moment in time.

AThen

  

Second moment in time.

AHours

  

Number of hours to check.

Function result

True if ANow and Athen are only AHours apart, false otherwise.

Description

WithinPastHours compares the timestamps ANow and AThen and returns True if the difference between them is at most AHours hours apart, or False if they are further apart.

Remark: Since this function uses the HoursBetween function to calculate the difference in Hours, this means that fractional hours do not count, and the fractional part is simply dropped, so for two dates actually 2 and a half hours 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.

WithinPastMinutes

  

Check whether two TDateTimes are only a number of minutes apart.

WithinPastSeconds

  

Check whether two TDateTimes are only a number of seconds apart.

WithinPastMilliSeconds

  

Check whether two TDateTimes are only a number of milliseconds apart.

Example

Program Example51;

{ This program demonstrates the WithinPastHours function }

Uses SysUtils,DateUtils;

Procedure Test(ANow,ThenDateTime; AHours : Integer);

begin
 Write(DateTimeToStr(Thenand ',DateTimeToStr(ANow));
 Write(' are within ',AHours,' hours: ');
 Writeln(WithinPastHours(ANow,Thenurs));
end;

Var
  D1,D2 : TDateTime;

Begin
  D1:=Now;
  D2:=D1-(59*OneMinute);
  Test(D1,D2,1);
  D2:=D1-(61*OneMinute);
  Test(D1,D2,1);
  D2:=D1-(122*OneMinute);
  Test(D1,D2,1);
  D2:=D1-(306*OneMinute);
  Test(D1,D2,5);
  D2:=D1-(5.4*OneHour);
  Test(D1,D2,5);
  D2:=D1-(2.5*OneHour);
  Test(D1,D2,1);
  Test(D1,D2,2);
  Test(D1,D2,3);
End.
Documentation generated on: Dec 24 2024