前端遍历数组的方式很多，记录一下
<body>
<div id="app">
<h2>{{TotalPrice}}</h2>
</div>
<script>
const app = new Vue({
el: '#app',
data: {
books: [{ id: 110, name: 'a1', price: 119 },
{ id: 111, name: 'a2', price: 120 },
{ id: 112, name: 'a3', price: 121 }]
},
//计算属性
computed: {
fullname: function () {
return this.firstName + " " + this.lastName;
},
TotalPrice: function () {
let result = 0;
for (let i = 0; i < this.books.length; i++) {
result += this.books[i].price;
}
for (let i in this.books) {
result += this.books[i].price;
}
for (let i of this.books) {
result += i.price;
}//注意of是类似于foreach的 直接取的对象
result =this.books.map(n => n.price).reduce((pre,n) => pre + n);
return result;
}
}
})
</script>
</body>