function Test1Controller($scope) {      
            var serverData = ["Samsung Galaxy Note", "Samsung Galaxy S6", "Samsung Galaxy Avant","Samsung Galaxy Young"];
            $scope.items= [] ;
    	//var selectedvalue = window.localStorage.getItem("selectedvalue");
    	// here selected value Samsung Galaxy S6
            var selectedvalue="Samsung Galaxy S6";
        for(var i=0;i<serverData.length;i++)
        {
            var modal = {
            name:serverData[i],
            selected:false
            };  
    	if (selectedvalue.indexOf(serverData[i]) >= 0 || null)
    	{
                modal.selected = true;

            }
         $scope.items.push(modal);        
        }
        //----------------------------Our Shop Offers----------------------------------------
        $scope.offers = [
        {
            id: "as23456",
            Store: "samsung",
            Offer_message:"1500rs off",
            modalname: "Samsung Galaxy Young"    

        },{
            id: "de34575",
            Store: "samsung",
            Offer_message:"20% Flat on Samsung Galaxy S6",
            modalname: "Samsung Galaxy S6"       

        },
        ]
        //-----------------------------------------------------------------------------------
   

$scope.selection = [];
     $scope.toggleSelection = function toggleSelection(item) {
     $scope.gotOffers=[];
     var idx = $scope.selection.indexOf(item);
      // is currently selected
     if (idx > -1) {
        $scope.selection.splice(idx, 1);
     }

      // is newly selected
      else {
        $scope.selection.push(item);
      }

      for(var i=0;i<$scope.selection.length;i++){
          for(var j=0;j<$scope.offers.length;j++){
            console.log($scope.selection[i].name  +"   "+ $scope.offers[j].modalname)
            if( $scope.selection[i].name  == $scope.offers[j].modalname){
              var idx = $scope.gotOffers.indexOf($scope.offers[j].Offer_message);
              if(idx == -1){
                console.log("inside idx")
                $scope.gotOffers.push($scope.offers[j]);
              }
            }
          }
        }
		console.log($scope.offers);		
    };
	//---------------------------------------------------------------------------------------
     $scope.check = function()	 
     {
         var checkedItems = [];
         console.log($scope.offerSelected)
        

     for(var i=0;i<$scope.items.length;i++)
        {
          if($scope.items[i].selected){
              checkedItems.push($scope.items[i].name);
          }
        }
              console.log(checkedItems) ; 
     }
}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.1.5/angular.min.js"></script>

<div ng-app>
  <div ng-controller="Test1Controller" >
    <div ng-repeat="item in items">
      <input type="checkbox" ng-model="item.selected"  ng-checked="selection.indexOf(item) > -1" ng-click="toggleSelection(item)"/> {{item.name}}
    </div>
    <select ng-show="gotOffers.length > 0" ng-model="offerSelected">
      <option ng-repeat="offer in gotOffers"  value="{{offer.id}}">{{offer.Offer_message}}</option>
    </select>
    <input type="button" name="submit" value="submit" ng-click="check()"/>
  </div>
</div>

function Test1Controller($scope) {
  $scope.items = [{"name": "Samsung Galaxy Note", "selected": false}, {"name": "Samsung Galaxy S6", "selected": true}, {"name": "Samsung Galaxy Avant", "selected": false}, {"name": "Samsung Galaxy Young","selected": false}];

  $scope.offers = [{
    id: "as23456",
    Store: "samsung",
    Offer_message: "1500rs off",
    modalname: "Samsung Galaxy Young"
  }, {
    id: "de34575",
    Store: "samsung",
    Offer_message: "20% Flat on Samsung Galaxy S6",
    modalname: "Samsung Galaxy S6"
  }, ];

  var selectedItems = function() {
    return $scope.items.filter(function(item) {
      return item.selected;
    });
  };

  $scope.availableOffers = function() {
    var items = selectedItems();
    return $scope.offers.filter(function(offer) {
      return items.some(function(item) {
        return item.name === offer.modalname;
      });
    });
  };
}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.1.5/angular.min.js"></script>

<div ng-app>
  <div ng-controller="Test1Controller" >
<div ng-repeat="item in items">
  <input type="checkbox" ng-model="item.selected" ng-click="toggleSelection(item)"/> {{item.name}}
</div>
<select ng-show="availableOffers().length > 0" ng-model="offerSelected">
  <option ng-repeat="offer in availableOffers()"  value="{{offer.id}}">{{offer.Offer_message}}</option>
</select>

  <input type="button" name="submit" value="submit" ng-click="check()"/>
  </div>
</div>