Looking for a way to locate all elements in array A that are not present in array B using lodash

When coding in JavaScript, I am faced with the following problem:

A = [1,2,3,4,5];
B = [3,4,6];
C = ??? // Need a solution here
console.log(c); // The expected result is [1,2,5]

I initially thought that this task could be easily achieved using lodash, but I have not been able to find a single function that does it. As a workaround, I came up with the following code snippet:

C = _.intersection(A, _.xor(A,B));

Is there any specific function that I may have overlooked for solving this issue?

javascriptarrayslodash

Answer №1

When using Lodash version 4.17.15:

To achieve this, you can simply use the following code: 

var result = _.pullAll(arr1, arr2);

var arr1 = [1,2,3,4,5];
var arr2 = [3,4,6];
var result = _.pullAll(arr1, arr2);
console.log(result); // Expected output is [1,2,5]
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="aac6c5cecbd9c2ea9e849b9d849b9b">[email protected]</a>/lodash.min.js"></script>

If using version 3.10.1 of Lodash:

Simply use the following code snippet: 

var result = _.difference(arr1, arr2);

var arr1 = [1,2,3,4,5];
var arr2 = [3,4,6];
var result = _.difference(arr1, arr2);
console.log(result); // Expected output is [1,2,5]
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="4c2023282d3f240c7f627d7c627d">[email protected]</a>/index.min.js">
</script>

Answer №2

Wouldn't it be interesting to use something similar to 

A.filter(item => !B.includes(item));
without relying on lodash?

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