Question

I have a JSON file and I need to retrieve only the items with the ten highest scores:

My data:

{
    "movies" : {
        "eraserhead" : {
               "full_title" : "Eraserhead",
               "votes": 50
         },
        "psycho" : {
               "full_title" : "Psycho",
               "votes" : 90  
         }
    }
}

etc, etc for a list of about 50 – 100.

I know I can iterate through and build a list, but I was curious if there’s any less processor-intensive way to filter these results based on that property (movies[title].votes).

Any help would be greatly appreciated, thank you.

Answer 1

The simplest would be to make an array, to sort the array and to take the first 10 elements.

var myArray = [];
for (var key in movies) {
    var movie = movies[key];
    movie.title = key; 
    myArray.push(movie);
}
var tenFirst = myArray.sort(function(a,b){return b.votes-a.votes}).slice(0,10);

Demonstration (open the console)