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var randInt = require('../random/randInt');
/**
* Shuffle array items.
*/
function shuffle(arr) {
var results = [],
rnd;
if (arr == null) {
return results;
}
var i = -1, len = arr.length;
while (++i < len) {
if (!i) {
results[0] = arr[0];
} else {
rnd = randInt(0, i);
results[i] = results[rnd];
results[rnd] = arr[i];
}
}
return results;
}
module.exports = shuffle;