How to Efficiently Merge Two Arrays of Objects Based on a Common Key?

Merging Arrays of Objects Based on a Common Key

Suppose you have two arrays of objects with a common key, such as id. You need to merge these arrays based on the common key and create a new array with the combined properties of both objects.

To achieve this efficiently, you can leverage the Object.assign() method. Here's how you can do it:

The Object.assign() method merges the properties of the objects passed as arguments into a new object. In this case, we use it to combine the properties of the corresponding objects in arrays arr1 and arr2.

The resulting array arr3 will contain the merged objects, each with the properties of both input objects:

This approach ensures efficient merging of arrays of objects based on a common key without the need for explicit iteration over object keys.

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