in reply to Re^2: Sorting Data By Overlapping Intervals
in thread Sorting Data By Overlapping Intervals
Oh, right, I read an elsif instead of the second if, which meant that you would only have exited the loop when $position is above range. Then resetting $placeholder to 0 would work I guess (untested). But the condition is that your input data has to be sorted (as in ordered), which it seemed to be in your sample.
Still, you don't check that $placeholder is a valid value, if the last element of @SNP is inside one of the ranges, you'll increase $placeholder and try to access $SNP[last element+1] which would yield undef. I'm not sure you thought of that case.
In the end, your inner loop reworked would be something like :
This is of course, completely untested :D.# It would probably be better have # while (my $line = <CG>) # but that would mean rethinking your whole code for my $line (@SNP) { my $position = (split " ", $line)[3]; last unless $position <= $end; print OUT $line if $position > $start; }
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