Скачать или смотреть How to Sort an Array of Objects by Last Name Using JavaScript sort Method

Discover how to effectively sort an array of objects by last name alphabetically in JavaScript with this detailed guide. Learn about the proper syntax and approach to use for best results!
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This video is based on the question https://stackoverflow.com/q/68501315/ asked by the user 'SwishitySwoosh' ( https://stackoverflow.com/u/16490359/ ) and on the answer https://stackoverflow.com/a/68501923/ provided by the user 'SwishitySwoosh' ( https://stackoverflow.com/u/16490359/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding the Problem: Sorting By Last Name in JavaScript

Sorting through arrays of objects is a common task in programming. This is particularly true when managing user accounts or records where names may need to be displayed in a specific order. One common requirement is to sort a list of users by their last names alphabetically. However, many developers encounter issues achieving this due to incorrect sorting logic.

In this post, we will address a common problem faced by developers when trying to sort an array of user accounts by last names.

Initial Attempt at Sorting

A developer attempted to use the sort method in JavaScript in the following manner:

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

This code snippet showcases the intent to sort the accounts. Unfortunately, this approach did not yield the desired outcome. Instead of sorting by last names, it simply returned the last names without any order.

The Reason for the Issue

Key Error: Accessing the Wrong Property

The primary error in the initial code is related to how the last names are accessed. The correct path through the data structure was not followed. Instead of accessing the last name directly from an object property, this code attempted to access it through a non-existent last property at the account level (i.e., x.last and y.last).

The Correct Approach

To successfully sort by last names, the developer provided the corrected code below, which properly accesses the last names:

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

Key Changes Made:

Accessing the Correct Property:

The change from x.last to x.name.last correctly navigates to the name object contained within each account.

Using localeCompare:

Instead of a direct comparison (- operator), localeCompare is used, which provides string comparison based on local language rules. This enables accurate alphabetical ordering.

Testing the Solution

Let's see how it works with a sample dataset:

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

Expected Output

When you run the above code, the sortedAccounts array will now be sorted by last names as follows:

Allen Bartlett

Ferrell Morris

Robertson Simmons

Esther Tucker

Conclusion

Sorting an array of objects, particularly by specific properties such as last names, requires attention to detail in how object properties are accessed and compared. Always remember to use the appropriate path to access nested properties and utilize string comparison methods like localeCompare for accurate results.

With this guide, you should now be able to sort arrays of objects in JavaScript by last name correctly!