Shuffle array

const shuffle = require('lodash').shuffle;

function shuffle(arr) {
    let ans = []
    count = arr.length
    for (let i = 0; i < count; i++) {
      let n = (Math.trunc(Math.random()*(arr.length - 0)))
      ans.push(arr[n])
      arr.splice(n, 1)
    }

    return ans
}