js 数组对象中goods_id相同和并一个对象，把goods_size_id值添加一起

 //数组对象中goods_id相同和并一个对象，把goods_size_id值添加一起

        let arr = [
            {
    
                goods_id:1,
                goods_size_id:22,
               
            },
            {
    
                goods_id:2,
                goods_size_id:23,
               
            },
            {
    
                goods_id:3,
                goods_size_id:24,
               
            },
            {
    
                goods_id:1,
                goods_size_id:25,
               
            },
        ]
   
        //处理成这种数据
        let newArr = [
            {
      goods_id:1, goods_size_id:[22,25]},
            {
      goods_id:2, goods_size_id:23},
            {
      goods_id:2, goods_size_id:24},
        ]
         function mergeArrFn(arr) {
    
            let newArr = [];
            arr.forEach(item => {
    
                let dataItem = item;
                if (newArr.length > 0) {
    
                    let filterValue = newArr.filter(v => {
    
                        return v.goods_id == dataItem.goods_id
                    })
                    if (filterValue.length > 0) {
    
                        newArr.forEach(n => {
    
                            if (n.goods_id == filterValue[0].goods_id) {
    
                                n.goods_size_id = [filterValue[0].goods_size_id, dataItem.goods_size_id]
                            }
                        })
                    } else {
    
                        newArr.push(dataItem)
                    }
                } else {
    
                    newArr.push(dataItem)
                }

            })
            return newArr
        }

	const fd = this.mergeArrFn(arr);
	console.log(fd,'fd)
	![在这里插入图片描述](https://img-blog.csdnimg.cn/cc0315c5afea47d39bd36004f166228e.png#pic_center)