Find duplicates in two arrays javascript

1. How to check if two arrays are identical JavaScript?
2. How to merge two arrays in JavaScript and de duplicate items?
3. How do you find multiple duplicates in array?

How to check if two arrays are identical JavaScript?

To conclude, to compare arrays to check for equality, Lodash's isEqual() function is the way to go if you need all the bells and whistles of checking that objects have the same class. The JSON. stringify() approach works well for POJOs, just make sure you take into account null.

How to merge two arrays in JavaScript and de duplicate items?

Example 1: Using concat() and for Loop

In the above program, the two array elements are merged together and the duplicate elements are removed. Here, The two arrays are merged using the concat() method. The for...of loop is used to loop through all the elements of arr .

How do you find multiple duplicates in array?

Duplicate elements can be found using two loops. The outer loop will iterate through the array from 0 to length of the array. The outer loop will select an element. The inner loop will be used to compare the selected element with the rest of the elements of the array.