@sorted_xy = sort { $a->[0] <=> $b->[0] || $a->[1] <=> $b->[1] } @xy;

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 or threreabouts

update:

I misinterpreted the structure of $xy; I thought it was a list of coordinate pairs. Use one of the other solutions instead!

Dave.

In reply to Re: sorting question by dave_the_m
in thread sorting question by chinman

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