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Скачать или смотреть How to Dynamically Create an Array of Objects in React from JSON Payloads

  • vlogize
  • 2025-10-08
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How to Dynamically Create an Array of Objects in React from JSON Payloads
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Описание к видео How to Dynamically Create an Array of Objects in React from JSON Payloads

Learn how to transform JSON payloads into a specific array of objects format required by react-table, with a simple and reusable mapping function.
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This video is based on the question https://stackoverflow.com/q/64545041/ asked by the user 'WaveRider' ( https://stackoverflow.com/u/609459/ ) and on the answer https://stackoverflow.com/a/64545410/ provided by the user 'Hyetigran' ( https://stackoverflow.com/u/2649506/ ) 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: Creating an array in React with objects created from two lists

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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.
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How to Dynamically Create an Array of Objects in React from JSON Payloads

In the world of React development, one common challenge developers face is handling and transforming data from JSON payloads into formats suitable for displaying in components like react-table. If you’re wondering how to take arrays of data and convert them into a structured format, you’ve come to the right place! In this post, we'll explore how to take data from a raw JSON payload and transform it into an array of objects to fit the requirements of a react-table.

The Problem: Arranging JSON Data for React-Table

Suppose you have the following JSON payload after fetching and parsing it:

[[See Video to Reveal this Text or Code Snippet]]

The challenge is to convert this structure into a specific format like below:

[[See Video to Reveal this Text or Code Snippet]]

To accomplish this, you want to create a function that works dynamically with any number of columns in rawPayload and formats the data correctly.

The Solution: Writing a Dynamic Mapping Function

Here's how you can create a function (tableMap) that will take in the rawPayload and return the desired format. Let’s break down the solution step-by-step.

Step 1: Extract Column Names and Length

Begin by extracting the column names and determining how many rows of data there are. We do this using the Object.keys() and Object.values() methods:

[[See Video to Reveal this Text or Code Snippet]]

colNames will hold the keys from the rawPayload, such as ['Names', 'Nums', 'Range'].

length indicates how many rows we need to construct in the resulting array.

Step 2: Initialize the Result Array

Next, initialize an empty array rTableObj, where we will push our results.

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Loop Through Each Row

Use a nested loop structure to iterate through the indices of the rows and columns. For each row index, create an entry object to hold the corresponding values for each column name:

[[See Video to Reveal this Text or Code Snippet]]

The outer loop iterates through the length of the rows.

The inner loop populates the entry object with data from rawPayload using the current column name.

Step 4: Return the Result

Finally, the function concludes by returning the constructed array of objects:

[[See Video to Reveal this Text or Code Snippet]]

Full Function Code

Putting it all together, the complete dynamic mapping function looks like this:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By following this structured process, you now have a flexible way to convert JSON payloads into an array of objects that can be utilized in a react-table component. Whether your rawPayload structure changes or adjusts, the above function can dynamically adapt to fit your needs. This not only makes your code more manageable but also improves scalability as your data requirements evolve.

Give this a try with your data payloads and watch your tables populate seamlessly!

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