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Re: Converting a list of numbers to use a range operator

by arnaud99 (Beadle)
on Mar 23, 2013 at 21:19 UTC ( #1025080=note: print w/ replies, xml ) Need Help??


in reply to [Solved] Converting a list of numbers to use a range operator

Hi

This is my version for solving this. Probably very similar to some of the answers above.

use Modern::Perl; use Data::Dumper; #some ranges, for testing purposes. my @array = (2,3,4,10,11,12,13,20,21,22,34,35,36,37,38); my $prev = undef; my @ranges; my $index = -1; #Build Array of array. #One Array ref for each contiguous range foreach my $val ( sort {$a <=> $b } @array ) { if (!defined($prev) || $val != $prev +1 ) { $index++; $ranges[$index] = [$val]; } else { push @{ $ranges[$index] }, $val; } $prev = $val; } print Dumper(\@ranges); #loop though each range (array ref), and get the first and last el +ement #for each range foreach my $a_range (@ranges) { say "range: ", $a_range->[0], '..', $a_range->[-1]; }

Output

$VAR1 = [ [ 2, 3, 4 ], [ 10, 11, 12, 13 ], [ 20, 21, 22 ], [ 34, 35, 36, 37, 38 ] ]; range: 2..4 range: 10..13 range: 20..22 range: 34..38
Cheers.

Arnaud.


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