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const splitArr = (arr, chunks) =>
arr.reduce((acc, n, i) => ((acc[i % chunks] = acc[i % chunks] || []).push(n), acc), []);
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var shuffledArr = arr.sort(function(){
return Math.random() - 0.5;
});UU
var shuffledArr = arr.sort(function(){
return Math.random() - 0.5;
});M
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