| [Overview][Constants][Procedures and functions][Index] |
Check whether two TDateTimes are only a number of seconds apart
Source position: dateutil.inc line 249
function WithinPastSeconds( |
const ANow: TDateTime; |
const AThen: TDateTime; |
const ASeconds: Int64 |
):Boolean; |
ANow |
|
First moment in time |
AThen |
|
Second moment in time |
ASeconds |
|
Number of seconds to check |
True if ANow and Athen are only ASeconds apart, false otherwise
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 |
|
Check whether two TDateTimes are only a number of years apart |
|
|
Check whether two TDateTimes are only a number of months apart |
|
|
Check whether two TDateTimes are only a number of weeks apart |
|
|
Check whether two TDateTimes are only a number of days apart |
|
|
Check whether two TDateTimes are only a number of hours apart |
|
|
Check whether two TDateTimes are only a number of minutes apart |
|
|
Check whether two TDateTimes are only a number of milliseconds apart |
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.