Vue里面交换数组两个元素的位置

if (i < basket.questions.length - 1) {
    var tempOption = basket.questions[i + 1];
    this.$set(basket.questions, i + 1, basket.questions[i])
    this.$set(basket.questions, i, tempOption)
}

if (i > 0) {
    var tempOption = basket.questions[i - 1];
    this.$set(basket.questions, i - 1, basket.questions[i]);
    this.$set(basket.questions, i, tempOption)
}