CODEWITHSUNDEEP
javascriptreactjslodash
Fahad Sohail
Fahad Sohail

Reputation: 1836

How to preserve object keys in lodash filter

I have an array

const sampleObject = {Color: "Blue", Size: "39, 41"}

Using Lodash's _.filter when I try

_.filter(sampleObject, (entry) => entry !== 'Blue')

I get

['39, 41']

But my desired result is

{Size: '39, 41'}


const sampleObject = {
  Color: "Blue",
  Size: "39, 41"
}
const filtered = _.filter(sampleObject, (entry) => entry !== 'Blue')
console.log(filtered);
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/lodash.min.js"></script>

Upvotes: 1

Views: 837

Answers (3)

T.J. Crowder
T.J. Crowder

Reputation: 1074495

If you want just that one property in a new object, grab it directly:

const sampleObject = {Color: "Blue", Size: "39, 41"};

const result = {Size: sampleObject.Size};

console.log(result);

Or if you need the key to be dynamic:

const sampleObject = {Color: "Blue", Size: "39, 41"};

const key = "Size";

const result = {[key]: sampleObject[key]};

console.log(result);

Upvotes: 0

Tushar Shahi
Tushar Shahi

Reputation: 20486

Are you looking for _.pickBy()?

const sampleObject = {
  Color: "Blue",
  Size: "39, 41"
}
const filtered = _.pickBy(sampleObject, (value,key) => value !== 'Blue')
console.log(filtered);
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/lodash.min.js"></script>

Upvotes: 3

epascarello
epascarello

Reputation: 207521

Seems odd you need to do this, but you can use fromEntries and entries to do it

const sampleObject = {Color: "Blue", Size: "39, 41"}
const result = Object.fromEntries(Object.entries(sampleObject).filter(x => x[1] !== 'Blue'));

console.log(result);

Upvotes: 0

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