use itertoolsarray-from ( o → a )Make the object on the stack into an array using Array.from.
zip ( zi → zo )Given an array of arrays [a, b, ...], returns the zipped arrays [[a0, b0, ...], [a1, b1, ...], [a2, b2, ...]...].
enumerate ( ei → eo )Like zip, but takes [a, b, c, d…] and returns [[0, a], [1, b], [2, c], [3, d]…].
killdups ( a → a )Remove all the duplicates in the array a, and return a new array.
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