24 lines
596 B
Raku
24 lines
596 B
Raku
sub range-extraction (*@ints) {
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my $prev = NaN;
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my @ranges;
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for @ints -> $int {
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if $int == $prev + 1 {
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@ranges[*-1].push: $int;
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}
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else {
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@ranges.push: [$int];
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}
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$prev = $int;
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}
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join ',', @ranges.map: -> @r { @r > 2 ?? "@r[0]-@r[*-1]" !! @r }
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}
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say range-extraction
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-6, -3, -2, -1, 0, 1, 3, 4, 5, 7, 8, 9, 10, 11, 14, 15, 17, 18, 19, 20;
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say range-extraction
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0, 1, 2, 4, 6, 7, 8, 11, 12, 14,
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15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
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25, 27, 28, 29, 30, 31, 32, 33, 35, 36,
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37, 38, 39;
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