SOURCE

var app = new Vue({
    el: '#app',
    data() {
        return {
            obj:{},
            myArray: [[{ name: 'aa', num: 1 }, { name: 'bb', num: 3 }], [{ name: 'aa', num: 13 }, { name: 'cc', num: 3 }]],
        }
    },
    mounted() {
        this.myArray = this.myArray.flat()
        this.myArray=this.getNewGoodsList(this.myArray)


    },
    methods: {
        getNewGoodsList(skuArray) {
            let temp = {};
            for (let i of skuArray) {
                let key = i.name; //判断依据
                if (temp[key]) {
                    temp[key].name = i.name;
                    temp[key].num += i.num;//相加值
                } else {
                    temp[key] = {};
                    temp[key].name = i.name;
                    temp[key].num =i.num;
                }
            }
            let newArry = [];
            this.obj=temp
            for (var k in temp) {
                newArry.push(temp[k]);
            }
            return newArry;
        },
    }
});

<div id="app">
{{myArray}}
</br>

{{obj}}
</div>