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It then returns the position of the array element or -1 if no element passes the test. There is no direct provision to access the index of the current. The findIndex() method takes a function containing a test as an argument and applies it to each element of the array without making any changes to the original array. The for-each loop simplifies the code by hiding the complexity behind the iterator() method. Find Index of Object With findIndex() Method

This method is a lot more elegant, but sadly it doesn’t work on old browsers. JavaScript ES6 introduced a new method called findIndex(). We could have used the map function to get the value of any property and get the index of the object based on that property. Lastly, we used the indexOf() method to get the index of the object whose age property is 45 and printed it to the console. Just like other array iterators such as map and filter, the callback function can take in three parameters: The current element: This is the item.

The forEach () method calls a specified callback function once for every element it iterates over inside an array. We then used the map function to just get the ages of employees in a separate array. And there's a helpful method JS devs typically use to do this: the forEach () method. The objects contain data of different employees. Create a new file called index.js, create a DynamoDB service client. In the above code, we first defined an array which contains two objects. You should commit your lock file along with your code to avoid potential breaking changes.