三种循环方法
- for( let i=0;i<this.books.length;i++){}
- for (let i in this.books){}
- for (let book of this.books){}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>02-计算属性的复杂操作</title>
</head>
<body>
<div id="app">
<h2>总价格：{{totalPrice}}</h2>
</div>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
books: [
{id: 0o110, name:'Unix编程技术0', price: 119},
{id: 0o111, name:'Unix编程技术1', price: 120},
{id: 0o112, name:'Unix编程技术2', price: 121},
{id: 0o113, name:'Unix编程技术3', price: 122},
{id: 0o114, name:'Unix编程技术4', price: 123},
]
},
computed:{
totalPrice:function (){
let result = 0
/* 方法一
for (let i=0;i<this.books.length;i++){
result += this.books[i].price
}*/
/* 方法二
for (let i in this.books) {
result += this.books[i].price
}*/
// 方法三
for (let book of this.books) {
result += book.price
}
return result
}
}
})
</script>
</body>
</html>