vue2.0's computed calculates the cumulative value of the list loop

This time I will bring you vue2.0 computed to calculate the cumulative value of the list loop. What are the precautions for vue2.0 computed to calculate the cumulative value of the list loop. The following is a practical case. Let’s take a look. one time.

The example is as follows:

<template>
 <p class="hello">
  <h1>{{ msg }}</h1>
  <h2>Foo</h2>
  <p v-for ="(item, index) in list">
  <!--<p>{{item }}</p>-->
  <h1 v-show="false">{{a[index] = item.bb}}</h1>
   <!-- <h1>index:{{index}}</h1>-->
  </p>
  <h2>a:{{a}}</h2>
  <h2>{{cc}}</h2>
  <!--<button v-on:click="cc">点击</button>-->
 </p>
</template>
<script>
export default {
 name: 'foo',
 data () {
  return {
   msg: '这儿是Foo',
   list:[{
     insertId: 'asfasf252',
     bb:29
   },{
    insertId: '2652',
     bb:20
   },{
    insertId: '996',
     bb:18
   }],
   a:[]
  }
 },
 computed:{
   cc: function(){
     var sum = 0;
     for(var i= 0 ;i< this.a.length; i++) {
        sum += parseInt(this.a[i]);
     }
     return sum;
   }
 }
}
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
h1, h2 {
 font-weight: normal;
}
ul {
 list-style-type: none;
 padding: 0;
}
li {
 display: inline-block;
 margin: 0 10px;
}
a {
 color: #42b983;
}
</style>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other php Chinese websites related articles!

Recommended reading:

How to modify the value in vue request data

How to assign $set to an array in vue.js renew

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