How to get object from JSON which has specific properties using lodash?

Question

I have a JSON string as follows:

var empJSON = {
    "Emp1":{
        id:"emp123124",
        name:"xyz"
    },
    "Emp2":{
        id:"emp12654",
        name:"abx"
    }
};

The structure of JSON is fixed.

I want to fetch the current object which has a specific id.

e.g. The Emp1 object where id is "emp123124".

How can I do this easily using lodash?

That's not JSON but a plain old object: What is the difference between JSON and Object Literal Notation? — Andreas
– Andreas, Commented Jan 12, 2017 at 10:56
What have you tried? Please, can you show us a Minimal, Complete, and Verifiable example — Andrea
– Andrea, Commented Jan 12, 2017 at 10:57

Andreas · Accepted Answer · 2017-01-12 11:07:15Z

2

_.find()

Iterates over elements of collection, returning the first element predicate returns truthy for. The predicate is invoked with three arguments: (value, index|key, collection).

var empJSON = {
  "Emp1": {
    id: "emp123124",
    name: "xyz"
  },
  "Emp2": {
    id: "emp12654",
    name: "abx"
  }
};

var id = "emp12654";
var result = _.find(empJSON, function(emp) { return emp.id === id });

console.log(result);

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>

answered Jan 12, 2017 at 11:07

Andreas

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Comments

Pranav C Balan · Accepted Answer · 2017-01-12 10:57:03Z

0

Use native JavaScript Object.keys and Array#find methods.

var empJSON = {
  "Emp1": {
    id: "emp123124",
    name: "xyz"
  },
  "Emp2": {
    id: "emp12654",
    name: "abx"
  }
};

var id = 'emp12654';
 
var res = empJSON[Object.keys(empJSON).find(function(k) {
  return empJSON[k].id == id;
})];

console.log(res);

answered Jan 12, 2017 at 10:57

Pranav C Balan

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1 Comment

Jamiec Over a year ago

I know - I realised that, hence why i deleted the comment 2 seconds later

stasovlas · Accepted Answer · 2017-01-12 13:58:32Z

0

just use _.find shorthand

_.find(empJSON, {id: 'emp123124'})

answered Jan 12, 2017 at 13:58

stasovlas

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