Created
November 8, 2017 22:44
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Javascript powerset function
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| const _ = require('lodash'); | |
| function supersetInner(src) { | |
| if (src.length === 0) return []; | |
| const withouts = _.map(src, elem => superset(_.without(src, elem))); | |
| return [src, ..._.flatten(withouts)]; | |
| } | |
| function superset(src) { | |
| return _.uniqWith(supersetInner(src), _.isEqual).sort(); | |
| } | |
| console.log(JSON.stringify(superset([1, 2, 3, 4]))); |
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