How do I filter out duplicates?

I absolutely love this API.  I have a question, however.

Let's say the contents of my collection after some manipulation is an array of objects with this signature :
```
{
       name: String,
       eLearning: String
} 
```

How would I filter out the dublicate objects? - e.g. objects with the exact name value and exact same eLearning value as an object already in the array?