20 lines
395 B
JavaScript
20 lines
395 B
JavaScript
(() => {
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'use strict';
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// powerset :: [a] -> [[a]]
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const powerset = xs =>
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xs.reduceRight((a, x) => a.concat(a.map(y => [x].concat(y))), [
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[]
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]);
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// TEST
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return {
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'[1,2,3] ->': powerset([1, 2, 3]),
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'empty set ->': powerset([]),
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'set which contains only the empty set ->': powerset([
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[]
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])
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};
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})()
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