refactor sum

src/views/gambleGameBucket/detail/index.vue

         </el-table-column>
         <el-table-column label="上莊分數" prop="bidChips"></el-table-column>      
         <el-table-column label="莊輸贏" prop="MemberRecord.earned"></el-table-column>      
-        <el-table-column label="總押注" prop="totalWager"></el-table-column>      
         <el-table-column label="抽水" prop="MemberRecord.serviceFees"></el-table-column>     
       </el-table-column>                   
     </el-table>
         })
         // TODO refactor
         let deal = {}
+
         dealingTemp.map((record, index) => {
           if (index % 6 === 0) {
             deal.door_0 = record.door
         this.detail = this.group.reduce((arr, element) => {
           return arr.concat(element)
         }, [])
-        this.bookie[0].totalWager = 0
-        this.detail.map((item) => {
-          this.bookie[0].totalWager += item.MemberRecord.wager
-        })
-        // TODO 抽出去
-        const sum = (i) => {
-          let count = 0
-          for (let j = 0; j < i; j++) {
-            count += this.group[j].length
-          }
-          return count
-        }
 
         this.group.map((item, itemIndex) => {
           let totalChips = 0
           item.map((person, personIndex) => {
             totalChips += person.MemberRecord.earned
-            item.length - 1 === personIndex ? this.detail[sum(itemIndex)].totalChips = totalChips : false
+            item.length - 1 === personIndex ? this.detail[this._sum(itemIndex)].totalChips = totalChips : false
           })
         })
 
             }`
           } else if (i === this.group.length - 1) {
             this.statement +=
-            `else if(this.rowIndex === ${sum(i)}){
+            `else if(this.rowIndex === ${this._sum(i)}){
               this.rowspan = ${this.group[i].length},
               this.colspan = 1
             }else {
             }`
           } else {
             this.statement +=
-            `else if(this.rowIndex === ${sum(i)}){
+            `else if(this.rowIndex === ${this._sum(i)}){
               this.rowspan = ${this.group[i].length},
               this.colspan = 1 
             }`
     handleFilter() {
       this.dealing = []
       this.getList()
+    },
+    _sum(i) {
+      let count = 0
+      for (let j = 0; j < i; j++) {
+          count += this.group[j].length
+      }
+      return count
     }
   },
   destroyed() {