How to Sort a JSON Object by Numeric Sorting Method

Learn how to easily sort a JSON object that contains numeric values as strings. This guide provides a step-by-step approach for proper numeric sorting using JavaScript.
---
This video is based on the question https://stackoverflow.com/q/66409055/ asked by the user 'Deeksha Mulgaonkar' ( https://stackoverflow.com/u/7478032/ ) and on the answer https://stackoverflow.com/a/66409149/ provided by the user 'behruz' ( https://stackoverflow.com/u/3288376/ ) 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 sort a json object by numeric sorting method

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/licensing
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Sort a JSON Object by Numeric Sorting Method

When working with JSON objects in JavaScript, you may find yourself needing to sort values that are represented as strings but contain numeric information. Alphabetic sorting might not yield the expected order, especially when numbers come into play. In this post, we will tackle how to perform numeric sorting on a JSON object effectively.

The Problem

Suppose you have a JSON object structured like this:

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

In this object, displayValue is a string that includes both letters and numbers. If you sort this using the default JavaScript sort method, 'A3' would come before 'B1' because it sorts based on UTF-16 code unit values. However, the required numeric order for the numbers should be:

B1

D1

C2

A3

A4

This calls for a custom sorting approach.

The Solution

To achieve the correct numerical sorting, we can use the JavaScript array sort method in conjunction with a custom sort function. This function will focus on extracting the numeric portion of the strings for comparison.

Here’s the Step-by-Step Code:

Use the sort Method:
The sort method will rearrange the elements of the array.

Implement the Custom Compare Function:
Inside the sort method, we utilize a comparison function that:

Extracts the numeric portion of each displayValue using a Regular Expression.

Compares these extracted values numerically.

The Code Snippet:

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

Breakdown of the Code:

a.displayValue.match(/\d+ /)[0]: This part uses a regular expression to find the first occurrence of one or more digits in the string.

match(/\d+ /) returns an array of matched digits, and [0] gives us the first match.

+ Operator: This converts the extracted string digit into a number for accurate mathematical comparison.

Subtraction: By subtracting the two numeric values (a and b), the sort function can determine their order:

If the result is negative, a comes before b.

If positive, b comes before a.

Outcome

After running the sorting code, your jsonObj would now be sorted in the desired numeric order:

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

Conclusion

Sorting JSON objects with numeric strings can pose a unique challenge, but with the right approach in JavaScript, you can achieve the desired results. By using a custom sort with regular expressions to extract numbers, you can ensure your data is sorted numerically rather than alphabetically.

If you have any further questions or need additional assistance, feel free to ask. Happy coding!

Видео How to Sort a JSON Object by Numeric Sorting Method канала vlogize