In JavaScript, working with arrays of objects is a common task. There are various functions, you might need to find the index of an object in an array based on specific properties such as key, ID, name, or value. In this tutorial, we'll explore how to achieve this using the findIndex and indexOf methods in JavaScript.

There some example by www school to convert array of objects into comma separated string in javascript:

Method 1: Using indexof()
Method 2: Using findindex()

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