[Overview][Constants][Procedures and functions] |
Check whether two datetimes are only a number of seconds apart
Source position: dateutil.inc line 247
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 |
Trueif ANowand Athenare only ASecondsapart, falseotherwise
WithinPastSecondscompares the timestamps ANowand AThenand returns Trueif the difference between them is at most ASecondsseconds apart, or Falseif they are further apart.
Remark: | Since this function uses the SecondsBetweenfunction 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 |
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Check whether two datetimes are only a number of years apart |
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Check whether two datetimes are only a number of months apart |
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Check whether two datetimes are only a number of weeks apart |
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Check whether two datetimes are only a number of days apart |
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Check whether two datetimes are only a number of hours apart |
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Check whether two datetimes are only a number of minutes apart |
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Check whether two datetimes 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.