var MongoClient = require('mongodb').MongoClient;

MongoClient.connect('mongodb://localhost:27017/school', function(err, db) {
if(err) throw err;

var cursor = db.collection('students').find();


cursor.each(function(err, doc) {
if(err) throw err;

console.log(doc);

var twoscore = doc.scores[2]['score']
var threescore = doc.scores[3]['score']

if ( twoscore > threescore){
doc.scores.splice(3,1);

console.log('2 is bigger than 3');
}else {

doc.scores.splice(2,1);
console.log('3 is bigger than 2');

}


db.collection('students').save(doc, function(err, saved) {
if(err) throw err;

console.dir(saved);
console.log('is this what you expected?');

return db.close();
});


});
});