Exercise 11

[SimoNonnis]

If I give a name to the anonymous function and console.log() it,
I get this error:
"TypeError: movieLists.map(...).concatAll is not a function"

[kurzninja]

You should probably post your whole code for the exercise so we can see exactly what you're doing.

[SimoNonnis]

function foo() {
var movieLists = [
{
name: "New Releases",
videos: [
{
"id": 70111470,
"title": "Die Hard",
"boxart": "http://cdn-0.nflximg.com/images/2891/DieHard.jpg",
"uri": "http://api.netflix.com/catalog/titles/movies/70111470",
"rating": 4.0,
"bookmark": []
},
{
"id": 654356453,
"title": "Bad Boys",
"boxart": "http://cdn-0.nflximg.com/images/2891/BadBoys.jpg",
"uri": "http://api.netflix.com/catalog/titles/movies/70111470",
"rating": 5.0,
"bookmark": [{ id:432534, time:65876586 }]
}
]
},
{
name: "Dramas",
videos: [
{
"id": 65432445,
"title": "The Chamber",
"boxart": "http://cdn-0.nflximg.com/images/2891/TheChamber.jpg",
"uri": "http://api.netflix.com/catalog/titles/movies/70111470",
"rating": 4.0,
"bookmark": []
},
{
"id": 675465,
"title": "Fracture",
"boxart": "http://cdn-0.nflximg.com/images/2891/Fracture.jpg",
"uri": "http://api.netflix.com/catalog/titles/movies/70111470",
"rating": 5.0,
"bookmark": [{ id:432534, time:65876586 }]
}
]
}
];

// ------------   INSERT CODE HERE!  -----------------------------------
// Use map and concatAll to flatten the movieLists in a list of video ids.
// ------------   INSERT CODE HERE!  -----------------------------------

return movieLists.
  map(function(movieList) {
    return movieList.videos.map(function(video) {
        return video.id;
      });
  }).
      concatAll();

}

console.log(foo());

[MaxKroshka]

if you are trying to console.log it outside of http://reactivex.io/learnrx/ website, you should copy a definition of concatAll() function as well, since it's not a built function. You can find concatAll() function declaration in exercise 10 and copy it.
i just checked it in JS Bin with your code, it worked.