in reply to Re^2: Sorting large sets of geometric coordinates
in thread Sorting large sets of geometric coordinates
It handles ties in $row_ly. <=> returns 0 if the two things it compares are equal. For example, if the compare function were to be called to compare the following two rows,
The first <=> would return 0 since $a->[1] (0.4) and $b->[1] (0.4) are both equal. It would then go on to compare $a->[0] (5.0) with $b->[0] (48.1)((5.0 0.4) (48.0 0.5)) ((48.1 0.4) (99.0 0.5))
Update: OOPS! Copy and paste error. The code should read:
my @sorted_data = sort { $a->[1] <=> $b->[1] || $a->[0] <=> $b->[0] } @unsorted_data;
Nod to BrowserUk for the head's up.
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