Search code examples
javascriptjsonunderscore.jslodash

Underscore.js - get unique property values

I only recently discovered the power of underscore.js, still new to the methods I kindly ask for a suggestion:

How do I get from this: 

[
    [{
        "name": "Type 2",
        "id": 14
    }],
    [{
        "name": "Type 1",
        "id": 13
    }, {
        "name": "Type 3",
        "id": 15
    }],
    [{
        "name": "Type 2",
        "id": 14
    }],
    [{
        "name": "Type 1",
        "id": 13
    }]
]

to this: 

["Type 1","Type 2","Type 3"]

i.e. no duplicated and "name" property only.

Any suggestions much appreciated.

Solution 
  • _(data).chain().flatten().pluck('name').unique().value()

    (Convert the nested lists to a flat one, pick name from each of the objects in the list, and make it unique.)