I've had this lying around. Is it any less painful?
use warnings;
use strict;
print ranges(2,3,4,10,11,12), "\n";
sub ranges {
my @vals = @_;
my $min = $vals[0];
my $max;
my @list;
for my $i (0 .. (scalar(@vals)-2)) {
if (($vals[$i+1] - $vals[$i]) != 1) {
$max = $vals[$i];
push @list, ($min == $max) ? $min : "$min-$max";
$min = $vals[$i+1];
}
}
$max = $vals[-1];
push @list, ($min == $max) ? $min : "$min-$max";
return join ', ', @list;
}
__END__
2-4, 10-12
I wonder if Set::IntSpan can do this.
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