Is using ng-init for bind once valid in angular js?

Question

i have a collection of values whose structure lets assume to be

var a = [{id:1, value:12, name="one"}, {id:2, value:34, name="two"},...]

i wanted to display this in a series of controls so that user can change the values. but with that i also wanted to display original values which obviously shoudn't change.
i found out a way that is working and my code is something like this using ng-init

 <div ng-repeat="p in a">
  <div class="control-group" ng-if="p.value>0">
    <label class="control-label" ng-bind="p.name"></label>
    <div class="controls controls-row" ng-init="v=p.value">
      <input class="span1" value="{{v}}"/>
      <input type="number" ng-model="p.value" class="span2" />
    </div>
  </div>
</div>

being a complete newbie in angularjs i dont know what implications this might have as i have very little experience in thinking about $watch and performance.

Is it ok to do so?

Answer 1

but with that i also wanted to display original values which obviously shoudn't change.

Use angular.copy(/* array */). It will create new copy (instance) of old array.

BTW a collection must be defined as $scope.a

Demo Fiddle