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vasylpb/gist:b683a147a0b1aab924fecadadab058fd

Created May 5, 2019 15:31
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concat nested arrays
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gistfile1.txt
// [1, [1, 2, [3, 4]], [2, 4]] -> [1, 1, 2, 3, 4, 2, 4]
const flatten = (arr) => arr.reduce((flat, toFlatten) => flat.concat(Array.isArray(toFlatten) ? flatten(toFlatten) : toFlatten), []);
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