example I don"t understand. Is scope the default binding list?
how can row get the current line automatically?
do not understand the principle of it

<template>
  <el-table
    :data="tableData4"
    style="width: 100%"
    max-height="250">
    <el-table-column
      fixed
      prop="date"
      label=""
      width="150">
    </el-table-column>
    <el-table-column
      prop="name"
      label=""
      width="120">
    </el-table-column>
    <el-table-column
      prop="province"
      label=""
      width="120">
    </el-table-column>
    <el-table-column
      prop="city"
      label=""
      width="120">
    </el-table-column>
    <el-table-column
      prop="address"
      label=""
      width="300">
    </el-table-column>
    <el-table-column
      prop="zip"
      label=""
      width="120">
    </el-table-column>
    <el-table-column
      fixed="right"
      label=""
      width="120">
      <template slot-scope="scope">
        <el-button
          @click.native.prevent="deleteRow(scope.$index, tableData4)"
          type="text"
          size="small">
          
        </el-button>
      </template>
    </el-table-column>
  </el-table>
</template>

<script>
  export default {
    methods: {
      deleteRow(index, rows) {
        rows.splice(index, 1);
      }
    },
    data() {
      return {
        tableData4: [{
          date: "2016-05-03",
          name: "",
          province: "",
          city: "",
          address: " 1518 ",
          zip: 200333
        }, {
          date: "2016-05-02",
          name: "",
          province: "",
          city: "",
          address: " 1518 ",
          zip: 200333
        }, {
          date: "2016-05-04",
          name: "",
          province: "",
          city: "",
          address: " 1518 ",
          zip: 200333
        }, {
          date: "2016-05-01",
          name: "",
          province: "",
          city: "",
          address: " 1518 ",
          zip: 200333
        }, {
          date: "2016-05-08",
          name: "",
          province: "",
          city: "",
          address: " 1518 ",
          zip: 200333
        }, {
          date: "2016-05-06",
          name: "",
          province: "",
          city: "",
          address: " 1518 ",
          zip: 200333
        }, {
          date: "2016-05-07",
          name: "",
          province: "",
          city: "",
          address: " 1518 ",
          zip: 200333
        }]
      }
    }
  }
</script>

solve the transfer of this code

<div class="div-tab">
            <el-table :data="bankLists" >
                <el-table-column prop="index" label="index" type="index" :index="indexMethod">
                </el-table-column>
                <el-table-column prop="id" label="">
                </el-table-column>
                <el-table-column prop="interfaceNo" label="">
                </el-table-column>
                <el-table-column prop="remarks" label="">
                </el-table-column>
                <el-table-column prop="writer" label="">
                </el-table-column>
                <el-table-column prop="createDate" label="">
                </el-table-column>
                <el-table-column prop="modifyDate" label="">
                </el-table-column>
                <el-table-column prop="send" label="">
                </el-table-column>
                <el-table-column prop="receive" label="">
                </el-table-column>
                <el-table-column label="" width="100px">
                      <template scope="scope">
                        <el-button size="small" type="primary"  icon="el-icon-edit" @click="bank_mapping_edit(scope.row)"></el-button>
                        <el-button size="small" type="danger"  icon="el-icon-delete" @click="bank_mapping_del(scope.row)"></el-button>
                      </template>
                </el-table-column>

            </el-table>
        </div>