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powerset javascript Code Snippet in 2022

mathalgorithmbeginner

Last Updated: 25 September 2022

Returns the powerset of a given array of numbers.

  • Use Array.prototype.reduce() combined with Array.prototype.map() to iterate over elements and combine into an array containing all combinations.
const powerset = arr => arr.reduce((a, v) => a.concat(a.map(r => r.concat(v))), [[]]);
powerset([1, 2]); // [[], [1], [2], [1, 2]]

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