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peterforgacs/flatten.js

Created November 9, 2019 21:45
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flatten.js
let arr = [ [1, 2], [3, 4]];
// version 1
arr.reduce((acc, curr) => acc.concat(curr), []);
// version 2
arr.reduce((acc, curr) => [...acc, ...curr], []);
// version 3
[].concat(...arr);
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