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aherve/flatten.js

Created August 30, 2017 14:28
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flatten.js
// flatten an array of arrays
const arrayOfArray = [ [1, 2], [3, 4], [[5, 6]] ]
const flattened = arrayOfArray.reduce((res, a) => [...res, ...a], [] )
console.log(flattened) // => [1, 2, 3, 4, [5, 6]]
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