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pedro-victor/flatten.js

Created February 28, 2019 20:39
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Flatten multi-dimensional arrays in Javascript
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flatten.js
const rec = (arr) => arr.reduce((a, b) => a.concat(Array.isArray(b) ? rec(b) : b), [])
rec([[1, 2, [3]], 4])
// [1, 2, 3, 4]
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