Cannot read property '0' of undefined

[vishnu038]

In RegisterController.js

function saveUpdatedProfile() {

var editProfile={

            "profileDetails":{
                "firstName":$scope.firstName,
                "lastName":$scope.lastName,
                "dob"      :$scope.dob,
                "eMailId":$scope.eMailId,

                  "ImageProofContent":$scope.imageProof[0].base64,
                 "ImageProofType":$scope.imageProof[0].filetype,

}

                           <input type="file" ng-model="imageProof" name="imageProof"  accept="image/jpg, zip" maxsize="5000" required base-sixty-four-input>
                           <img ng-show="form.imageProof.$valid" ngf-thumbnail="imageProof" class="thumb">
                          <span ng-show="form.imageProof.$dirty && form.imageProof.$error.required" class="help-block">Files must not exceed 5000 KB</span>
                        
                           <span ng-show="form.imageProof.$error.maxSize" class="help-block">File too large: max 1M</span>

i want the form to allow without selecting imageProof , form can be submiited without the imageproof .

Working fine when i select a file , getting this is when i am not selecting any file.
i have to send base64 and fileType to the server.