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z-------------/flatten.js

Last active October 26, 2019 11:05
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flatten.js
const flatten = list => {
if (!list.length) return [];
else {
const x = list[0];
if (Array.isArray(x)) return flatten([...x]).concat(flatten(list.slice(1)));
else return [x].concat(flatten(list.slice(1)));
}
};
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