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How to Convert Array to Array of Objects in JavaScript with forEach

Learn how to use JavaScript's `forEach` method to transform an array into an array of objects, and resolve issues you may encounter in the process. --- This video is based on the question https://stackoverflow.com/q/69175299/ asked by the user 'riyan193' ( https://stackoverflow.com/u/15701484/ ) and on the answer https://stackoverflow.com/a/69181265/ provided by the user 'dave' ( https://stackoverflow.com/u/2082673/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: how to foreach array to array object in javascript Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- How to Convert Array to Array of Objects in JavaScript with forEach If you're venturing into the world of JavaScript and dealing with data transformation, you might find yourself in a position where you need to convert an array into an array of objects. This can especially be confusing if you're working with complex nested data structures. In this post, we'll break down how to correctly use the forEach method to achieve this, especially in the context of preparing your data for JSON formatting. Understanding the Problem Recently, a developer faced a common issue while trying to transform their array of data into a specific nested object structure using JavaScript. They had a desired output in JSON format, but their attempts using the forEach loop were yielding results that did not match the expectations. The Desired Structure To clarify the objective, here's the JSON structure the developer wanted: [[See Video to Reveal this Text or Code Snippet]] The developer had written a piece of script trying to achieve this, but the output format was incorrect, and thus they sought help. The Solution Step 1: Initialize the Return Array Before you start using the forEach method, make sure that your return variable (returnData) is an array. This is crucial for storing your objects correctly. [[See Video to Reveal this Text or Code Snippet]] Step 2: Using forEach Correctly While iterating over your data, rather than using the Object.entries() approach that returns an indexed object, you should directly use forEach, like so: [[See Video to Reveal this Text or Code Snippet]] The Key Changes Explained Use of push() Method: Instead of assigning to returnData[key], you use returnData.push() to directly append a new object to your array. This maintains the order and structure of your data. Ensure Proper Sources: Make sure that you are accessing the correct properties from your original data (i.e., item.name, item.y, and item.total_ada). This ensures that your transformation reflects the intended layout accurately. Final Output Once you make these adjustments, your output should align with the desired JSON format without the extra indices you previously encountered. By following the above steps, you will easily transform an array into the structured array of objects you're looking for in JavaScript! Conclusion Transforming arrays into objects can initially seem daunting, but with understanding and the proper use of forEach, this task becomes straightforward. By ensuring you initialize your return variable properly and utilize the push() method correctly, you help ensure that your data is formatted as needed. Whenever you're stuck, remember to take a step back, question your approach, and simplify where necessary. Happy coding!