use strict;
use warnings;
my $enddate = todate();
while(<DATA>) {
last if ($. > 1 and $enddate < (split /,/)[1]);
print $_;
}
sub todate {
my ($year, $month, $day) = (localtime)[5,4,3];
return sprintf "%04d%02d%02d",$year + 1900, $month + 1, $day;
}
__DATA__
F12,F11,F481,F55,F989
8204B,20161002,1045.469,test,Y
8204,20170112,1064.848,test,Y
8204A,20170113,1064.505,test,Y
8204B,20170114,1045.469,test,Y
$. is a built-in variable that counts lines of input. The split function implicitly operates on the current input line, producing a list (or maybe an array), and we take a slice of that to look at the only field we care about, the date in the second column.
H:\perl>perl 1178418.pl
F12,F11,F481,F55,F989
8204B,20161002,1045.469,test,Y
8204,20170112,1064.848,test,Y
8204A,20170113,1064.505,test,Y
Updated: reduced if () {last if()} to just last if().
But God demonstrates His own love toward us, in that while we were yet sinners, Christ died for us. Romans 5:8 (NASB)
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