index相等的数据进行合并 

                                let formJson = [{
                                        remind: "请输入电话",
                                        sort: 0,
                                        title: "电话",
                                        type: 1,
                                        uuid: "15e343c1-060d-TL51f-8ace-23a968e9e2b9"
                                    },
                                    {
                                        remind: "请输入姓名",
                                        sort: 0,
                                        title: "姓名",
                                        type: 1,
                                        uuid: "15e343c1-060d-TL51f-8ace-23a968e9e2b7"
                                    },
                                    {
                                        remind: "请输入职位",
                                        sort: 0,
                                        title: "职位",
                                        type: 1,
                                        uuid: "15e343c1-060d-TL51f-8ace-23a968e9e2b8"
                                    },
                                ];
                                let lotteryQuestion = [{
                                        id: "18817164145",
                                        typeId: "1",
                                        value: "789"
                                    },
                                    {
                                        id: "19017164145",
                                        typeId: "2",
                                        value: "456"
                                    },
                                    {
                                        id: "1717164145",
                                        typeId: "3",
                                        value: "123"
                                    },
                                ];
                                // index相等的数据进行合并
                              let newArr=  lotteryQuestion.map((item,index)=>{
                                  return {...formJson[index],...item}
                                })
                                console.log(newArr,'测试');

效果图：

index相同的部分数据进行合并

                                let formJson = [{
                                        remind: "请输入电话",
                                        sort: 0,
                                        title: "电话",
                                        type: 1,
                                        uuid: "15e343c1-060d-TL51f-8ace-23a968e9e2b9"
                                    },
                                    {
                                        remind: "请输入姓名",
                                        sort: 0,
                                        title: "姓名",
                                        type: 1,
                                        uuid: "15e343c1-060d-TL51f-8ace-23a968e9e2b7"
                                    },
                                    {
                                        remind: "请输入职位",
                                        sort: 0,
                                        title: "职位",
                                        type: 1,
                                        uuid: "15e343c1-060d-TL51f-8ace-23a968e9e2b8"
                                    },
                                ];
                                let lotteryQuestion = [{
                                        id: "18817164145",
                                        typeId: "1",
                                        value: "789"
                                    },
                                    {
                                        id: "19017164145",
                                        typeId: "2",
                                        value: "456"
                                    },
                                    {
                                        id: "1717164145",
                                        typeId: "3",
                                        value: "123"
                                    },
                                ];
                                // index相等的部分数据进行合并
                                formJson.map((item,index)=>{
                                   lotteryQuestion[index].title=item.title;
                                   lotteryQuestion[index].uuid = item.uuid
                                })
                                console.log(lotteryQuestion,'部分数据合并');

效果图：