gistfile1.txt

// Randomly select one of all elements after the current element to exchange with the current element
function shuffle(arr) {
    for (let i = 0; i < arr.length; i++) {
        let randomIndex = i + Math.floor(Math.random() * (arr.length - i));
        [arr[i], arr[randomIndex]] = [arr[randomIndex], arr[i]]
    }
    return arr
}

// Generate a new array, randomly take an element from the original array and put it into the new array
function shuffle2(arr) {
    let _arr = []
    while (arr.length) {
        let randomIndex = Math.floor(Math.random() * (arr.length))
        _arr.push(arr.splice(randomIndex, 1)[0])
    }
    return _arr
}