Henry Wong wrote:

> Ok, i've decided to skip using the Date::Manip coz its giving me lots of
> problems. Is there a way to compare dates (e.g. Thu Jun 20 12:00:00 2002)
> and sort them in order? What i've always wanted is to sort them, and
> subsequently using User's input of Start & End date to capture relevant
> logs as explained below.
> 
> Assuming that $noforlines is the no of lines the log file has, and that
> $convertedList[] contains the dates, while $user_start & $user_end
> containing the user's desired start & end date, how do i compare dates?
> The below coding doesn't seem to work right.
> 
> for ($s=0;$s<$noforlines;$s++) {
>     if (($convertedList[$sian]>= $user_start)&&($convertedList[$sian]<=
> $user_end)) {
>  open (USER, ">>${filename}_REQUEST.TXT");
>  print USER "$convertedList[$sian]\t$inputList[$sian]\n";
>     }
> 
> Pls advise, thanks.
> 
> Regards,
> 
> ~ HENRY WONG ~

what problem do you have with Date::Manip? :-) I found it very easy to use.

anyway, if you don't want to use Date::Manip, you can still sort/compare 
date/time. there are a couple ways(at least) of doing this:

1. compare the date/time as string. consider you have the following 2 dates:

my $date1 = '2002-12-23 21:34:45';
my $date2 = '2002-12-21 09:08:12';

you can compare them like:

if($date1 > $date2){
        print "yes\n";
}else{
        print "no\n";
}

which we use it as string and compare it like a string. you must remember to 
make all of your dates the same exact format. if you don't, you will run 
into problem like:

my $date1 = '2002-12-23 21:34:45';
my $date2 = '2002-2-23 02:34:12';

suddenly, $date2 is 'bigger' than $date1 but $date1 is Dec 2002 and $date1 
is only Feb 2002.

2. another way is to convert the date string into seconds with Time::Local 
and localtime. when the user enter a date, convert it to seconds and then 
compare it with whatever you parsed from the log. i would recommand you 
using this method

david

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