2016 Update
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7965 changed files with 139854 additions and 31002 deletions
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Task/Flatten-a-list/JavaScript/flatten-a-list-5.js
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Task/Flatten-a-list/JavaScript/flatten-a-list-5.js
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let flatten = list => list.reduce(
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(a, b) => a.concat(Array.isArray(b) ? flatten(b) : b), []
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);
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