Check if item from one object exists in another (using underscore)

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I am trying to compare 2 objets using underscore, specifically I am trying to compare the key/values of "id" (because other things inside will change). I basically want to just check if object A has an item that object B does not have, remove it from object A. Here is my attempt at it :

for(var c=0;c<$scope.promptsPlease.currentData.selections[$scope.typeTracker].types.length;c++){
                var real = _.some($scope.storeTempName, function(it) {
                            return it.id == $scope.promptsPlease.currentData.selections[$scope.typeTracker].types[c].typeId; 
                    });

                if(real){
                }else{  
                    $scope.promptsPlease.currentData.selections[$scope.typeTracker].types.splice(,1);
                }

            }

Where $scope.storeTempName is object B and $scope.promptsPlease.currentData.selections[$scope.typeTracker].types is object A. So if $scope.promptsPlease.currentData.selections[$scope.typeTracker].types has something $scope.storeTempName does not, remove it (tracking by id and typyId for types).

This first attempt I have works, BUT it only will remove the first one. My guess is it's becasue I'm looping from 0 ++ and the index's are changing when i remove the first one so splice is targetting a false item. I am not sure though, and could use some help. Thank you for reading!

asked 44 secs ago

ajmajmajma

450

Check if item from one object exists in another (using underscore)