How to remove undefined and null values from an object using lodash?

When using Lodash to process objects and remove undefined and empty values, several methods can be employed. The most common approach is using the _.pickBy method with appropriate predicate conditions. I will explain this method in detail and provide a relevant example.

Using _.pickBy

The _.pickBy method creates an object consisting of properties from the original object for which the predicate function returns a truthy value. We can utilize this method with appropriate conditions to filter out undefined and empty values.

Example Code

Suppose we have the following object:

javascript
import _ from 'lodash';

const object = {
  a: 1,
  b: 'Hello',
  c: undefined,
  d: null,
  e: '',
  f: 0
};

We want to remove the keys with values undefined, null, and empty string ''. The code using _.pickBy is as follows:

javascript
const cleanedObject = _.pickBy(object, value => value !== undefined && value !== null && value !== '');

Result

cleanedObject will be:

json
{
  "a": 1,
  "b": "Hello",
  "f": 0
}

As seen, the keys c, d, and e are removed from the resulting object because their values are undefined, null, or empty string ''.

Important Notes

When using _.pickBy, it's important to ensure that the predicate function accurately specifies which values should be excluded. In the above example, we explicitly check for undefined, null, and empty string. Additionally, values of 0 and false are considered valid and remain in the final object. This approach provides high flexibility, allowing the predicate function to be adjusted according to specific requirements.

This is how to use Lodash to remove undefined and empty values from objects. By doing this, we can ensure that the object contains only valid and meaningful data, which is crucial for data processing and subsequent operations.