Collect.js whereNotNull Method

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The whereNotNull() method is used to return a collection that does not contain any null values. In simple words, it filters the values that are not null.

Installation:

In NodeJs:
```
npm install collect.js
```

CDN for collect.js

<script src="https://cdnjs.com/libraries/collect.js"></script>

Syntax:

whereNotNull(key if any)

Parameters: It takes the key of the element in an object.

Return Value: It returns the object.

Example 1:

Javascript

// Importing the collect.js module. 
const collect = require('collect.js'); 
  
let obj1 = [{ "a": null }, { "a": 3 },  
    { "b": null }, { "b": 33 }, { "a": null }]; 
  
// Making a collection 
let collection = collect(obj1); 
  
// Filtering the null values; 
let collectionFilter = collection.whereNotNull("a"); 
  
// Printing the original collection 
console.log("Original collection is: ", collection.all()) 
console.log("filter only key \"a\" for null values") 
console.log("Filtered collection is: ",  
        collectionFilter.all()); 

Output:

Example 2:

Javascript

// Importing the collect.js module. 
const collect = require('collect.js'); 
let obj1 = [1, 2, null, null, 5]; 
  
// Making a collection 
let collection = collect(obj1); 
  
// Filtering the null values; 
let collectionFilter = collection.whereNotNull(); 
console.log("Original collection is: ", 
            collection.all()) 
  
console.log("Filtered collection is: ",  
            collectionFilter.all()); 

Output:

Reference: https://collect.js.org/api/whereNotNull.html

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