Index finite lists of positive integers: Difference between revisions
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Drkameleon (talk | contribs) (Added Arturo implementation) |
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[1, 2, 3, 10, 100, 987654321] |
[1, 2, 3, 10, 100, 987654321] |
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</pre> |
</pre> |
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=={{header|Arturo}}== |
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<lang rebol>rank: function [arr][ |
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if empty? arr -> return 0 |
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from.binary "1" ++ join.with:"0" map arr 'a -> repeat "1" a |
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] |
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unrank: function [rnk][ |
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if rnk=1 -> return [0] |
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bn: as.binary rnk |
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map split.by:"0" slice bn 1 dec size bn => size |
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] |
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l: [1, 2, 3, 5, 8] |
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print ["The initial list:" l] |
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r: rank l |
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print ["Ranked:" r] |
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u: unrank r |
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print ["Unranked:" u]</lang> |
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{{out}} |
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<pre>The initial list: [1 2 3 5 8] |
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Ranked: 14401279 |
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Unranked: [1 2 3 5 8]</pre> |
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=={{header|D}}== |
=={{header|D}}== |
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