How to usefilter() and some() in Javascript

Approach 5: Using filter() and Map and has()

The some() method is used to check if there is any object in array1 with the same id as the current object in array2.
The filter() method is applied to array2 to only include objects that are not present in array1 (based on the id property).
The final array, resultArray, contains unique objects from both arrays.

Example: This example shows the implementation of the above-explained approach.

JavaScript

const array1 = [{ id: 1, name: 'John' },
{ id: 2, name: 'Jane' }];
const array2 = [{ id: 2, name: 'Jane' },
{ id: 3, name: 'Doe' }];
 
const mergedArray = array2.filter(item2 =>
    !array1.some(item1 => item1.id === item2.id)
);
const resultArray = [...array1, ...mergedArray];
console.log(resultArray);

Output

[
  { id: 1, name: 'John' },
  { id: 2, name: 'Jane' },
  { id: 3, name: 'Doe' }
]

How to Merge two Different Arrays of Objects with Unique Values only in JavaScript ?

Merging two arrays of objects with unique values is a common task in JavaScript. This operation involves combining the elements of two arrays while ensuring that each resulting object has a unique identifier. We will explore various approaches to merging two arrays of objects with unique values.

These are the following approaches:

Table of Content

Using concat() and filter()
Using reduce()
Using Map and Set
Using filter() and some()
Using filter() and Map and has()

Tags:

#JavaScript #Web Technologies

Approach 3: Using Map and Set

Approach 5: Using filter() and Map and has()

How to usefilter() and some() in Javascript

JavaScript

How to Merge two Different Arrays of Objects with Unique Values only in JavaScript ?

Similar Reads

Contact Us