javascript - angular form set variable equal expression -

i have following object:

  $scope.module.discount = [{             licences: 0,             discountpercentage: 0,             new_value_pr_licence: 0         }] 

and following simple form:

    <div class="form-group">     <label>pris pr licens</label>     <div class="input-group m-b">         <input type="number" class="form-control" ng-model="module.price_pr_licence">         <span class="input-group-addon">kr</span>     </div> </div> <div class="col-xs-12">     <table>         <thead>         <th>licenser</th>         <th>% rabat</th>         <th>ny pris pr stk</th>         </thead>         <tbody>         <tr  ng-repeat="discount in module.discount">             <td>                 <input class="form-control" ng-model="discount.licences" type="number" required="">             </td>             <td>                 <input class="form-control" type="number" ng-model="discount.discountpercentage" required="">             </td>              <td>                 <button class="btn btn-sm btn-default">{{module.price_pr_licence * (1-(discount.discountpercentage / 100))}}</button>             </td>         </tr>         </tbody>     </table> </div> 

as can see button's value expression:

{{module.price_pr_licence * (1-(discount.discountpercentage / 100))}} 

now wish set:

discount.new_value_pr_licence = module.price_pr_licence * (1-(discount.discountpercentage / 100)) 

however im not quite sure how that.

how bind variable such expression?

you can go computed property (via accessor) keep things clean , spare angular's expression parser not support full js expression trees..

 $scope.module.discount = [{             licences: 0,             discountpercentage: 0,             new_value_pr_licence: 0,             discountedprice() {                 return ($scope.module.somevalue + this.someothervalue / 100)             }         }] 

then later on reference

 {{discount.discountedprice}} 

fiddle:

fiddle