Unique Array Items

Let's use the example from our previous lesson. We have an array of phone numbers. We want to make sure that the phone numbers are unique.

1{
2  "name": "John Doe",
3  "age": 25,
4  "phones": ["123-456-7890", "987-654-3210"]
5}

uniqueItems Keyword

To ensure that the items in an array are unique, you can use the uniqueItems keyword.

Example:

1{
2  "type": "array",
3  "items": {...},
4  "uniqueItems": true
5}

Now, try to modify the phones property in the schema given on the side editor to ensure that the phone numbers are unique.