优化vue代码 let isHave = false; let time = thirdTime.getTime() if (vehicleTimeList&&vehicleTimeList.length>0){ for (let i =vehicleTimeList.length - 1; i >= 0; i--) { if (vehicleTimeList[i]==time){ isHave=true } } }
时间: 2024-02-14 13:05:01 浏览: 67
可以优化的地方有:
1. 使用`Array.prototype.includes()`方法来判断`time`是否存在于`vehicleTimeList`中,可以取代`for`循环。
2. 如果`vehicleTimeList`是一个有序数组,可以使用二分查找法来判断`time`是否存在,可以进一步提高效率。
优化后的代码如下:
```
let isHave = vehicleTimeList && vehicleTimeList.includes(thirdTime.getTime());
```
或者
```
let isHave = false;
if (vehicleTimeList && vehicleTimeList.length > 0) {
let low = 0;
let high = vehicleTimeList.length - 1;
while (low <= high) {
let mid = Math.floor((low + high) / 2);
if (vehicleTimeList[mid] === time) {
isHave = true;
break;
} else if (vehicleTimeList[mid] < time) {
low = mid + 1;
} else {
high = mid - 1;
}
}
}
```
相关问题
<div v-if="data.day == item.time && item.GFinfo.length < 3" class="infoFidng" ></div>
+ 1">
This is a Vue.js directive used to conditionally render an element based on a truthy value. In this case, the element will only be rendered if the value of the "day" property in the "data" object is equal to the value of the "time" property in the "item" object plus one.
v-if="(Array.isArray(this.AccountCouponList) && this.AccountCouponList.length>0) v-if上面是否需要加this??
不需要加上 "this"。在 Vue.js 中,"v-if" 是一个指令,用于条件性地渲染元素。当你在模板中使用 "v-if" 时,你可以直接引用组件实例中的数据。而在这种情况下,你可以直接使用 "AccountCouponList",而不需要加上 "this" 关键字。所以正确的写法是:v-if="(Array.isArray(AccountCouponList) && AccountCouponList.length > 0)"。
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