CODEWITHSUNDEEP
javascriptlodash
Toran Billups
Toran Billups

Reputation: 27399

How to map an object by given key using lodash?

I have an object that looks something like this

{id: "2", name: "foo", price: "1"}

I want to transform this to the following

{2: {id: "2", name: "foo", price: "1"}}

I'm able to achieve this today if I wrap this object with a simple array like so thanks to the friendly keyBy method for array

_.keyBy([action.response], function(item) { return item.id; });

What I would prefer of course is the same result but without having to wrap this with an array first. Does transform/reduce or some other lodash v4 method provide this functionality?

Upvotes: 1

Views: 474

Answers (2)

Christian Zosel
Christian Zosel

Reputation: 1424

Short solution based on ES6 computed property names: { [obj.id]: obj }

Example:

var obj = {id: "2", name: "foo", price: "1"}
var transformed = { [obj.id]: obj }
console.log(transformed)

Upvotes: 4

Marcelo Lazaroni
Marcelo Lazaroni

Reputation: 10239

You can do this directly with a function:

function convert(obj) {
 var result = {}
 result[obj.id] = obj
 return result
}

Is that what you are looking for?

Upvotes: 3

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