Element UI table参数中的selectable的使用及遇到坑

 <el-table-column :selectable='selectable' type="selection" :reserve-selection="true">
             </el-table-column>

selectable(row,index) {

       if(row.id==="10001"){
           return false
       }else {
           return true
       }
    }

 selectable(row,index) {
        this.arr(el=>{
            if(el==row.id){
                return false;
            }else{
                return true;
            }
        })
    }

 selectable(row,index) {
       if(this.arr.some(el=>{return el===row.id})){
           return false;
       }else{
           return true;
       }
    }