javascript - Managing an Array of Likes in AngularJS Service -

i have button on profile page, on click of button want maintain array of , store db.

in profile controller have

$scope.likeprofile = userservice.likeprofile(loggedinuser,$state.params.userid);

in user service have

function likeprofile(likedby,id){    var likearray = [];    likearray.push(likedby);    ref.child("users").child(id).update({ likedby: likearray}); } 

i want understand how not intialize likearray everytime likeprofile method called. likes pushed array.

i this, not sure though if want achieve. initialization should not done within function if want keep result. keeps result within scope of one user.

$scope.likearray = [];  function likeprofile (likedby, id) {     $scope.likearray.push(likedby);     ref.child("users").child(id).update({ likedby: likearray}); } 

otherwise, if need overall likes have initialize array previous values within function, sth.

likearray = getlikesfromdb();   // access db likearray.push(likedby); ref.child("users").child(id).update({ likedby: likearray }); 

try debug browser dev tools (e.g. in chrome tools > developer tools) , see send in network tab. if array contains 1 value whole array overwritten unless write custom update function adds value rather replaces value.