Hello guys i cant find actually info about convert string to array and after check them.Im trying check have this post in usermeta or not. Before converting to array this string. But it doesnt work why?

  $scope.like = function(id) {
    PostService.GetUserMeta(user)
      .then(function(data){
        var likes = '290 270'
        var check_likes = likes.split(" ");
    if(check_likes!=id) {
    $http.jsonp('http://somesite.com/api/userplus/update_user_meta_vars/', {
      params: {
        like_post: id + ',' + likes,
        callback: "JSON_CALLBACK"
      }
     }).success(function(data) {
        console.log('Id added to array');  
      });
    }
    else {
      console.log('ID already in array');
    }
  })}

Hello guys i cant find actually info about convert string to array and after check them.Im trying check have this post in usermeta or not. Before converting to array this string. But it doesnt work why?

$scope.like = function(id) {
    PostService.GetUserMeta(user).then(function(data) {
        var likes = '290 270'
        var check_likes = likes.split(" ");
        if (check_likes != id) {
            $http.jsonp('http://somesite.com/api/userplus/update_user_meta_vars/', {
                params: {
                    like_post: id + ',' + likes,
                    callback: "JSON_CALLBACK"
                }
            }).success(function(data) {
                console.log('Id added to array'); 
            });
        } else {
            console.log('ID already in array');
        }
    }) 
}