提取数组里面的某一项

publicing(postSettle,data)
                .then((res)=>{
                    console.log(res)
                    this.extraUserInfo = res.data.data.extraData.userInfo
                    this.goodsData = res.data.data.data
                    
                    let new_arr = this.goodsData.map(obj => {return obj.id})//提取数组里面的每一项里面的id
                    this.ids2 = new_arr
                    //拼接字符串id
                    let idList = "";
                    for(let index in this.ids2){
                        idList = idList + this.ids2[index] + ",";
                    }
                    //去掉双引号
                    console.log("idList====",idList)
                    //去除idList最后一个逗号
                    idList = idList.substring(0,idList.length - 1);
                    console.log("idList去除逗号后====",idList)
                    log(idList)
                    
                })
                .catch((err)=>{
                    console.log(err)
                })