How to Sort Arrays of Objects by Subarray and Dates in JavaScript скачать в хорошем качестве

How to Sort Arrays of Objects by Subarray and Dates in JavaScript

A step-by-step guide to sorting arrays of objects based on subarrays and date values using JavaScript. Learn how to achieve elegant solutions without separating the arrays. --- This video is based on the question https://stackoverflow.com/q/69175166/ asked by the user 'msmoore' ( https://stackoverflow.com/u/12657708/ ) and on the answer https://stackoverflow.com/a/69175264/ 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: Sort array of objects based first on a subarray and then on dates (without splitting the array) 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 Sort Arrays of Objects by Subarray and Dates in JavaScript When working with arrays of objects in JavaScript, you may find yourself needing to sort these arrays based on specific criteria. In this guide, we will dive into an interesting problem: sorting an array of job objects based on whether they include a specific role and then by date. The Problem Consider the following array of job objects, where each job has a date and a role: [[See Video to Reveal this Text or Code Snippet]] In our scenario, we want to sort this array first based on whether the job includes the role of a waiter and then chronologically by the date. The desired output of our sorted jobs would be: [[See Video to Reveal this Text or Code Snippet]] The Challenge Many programmers might attempt to solve this problem by splitting the array into two separate arrays: one for those that include the waiter role and one for those that do not. However, there is a more elegant approach that allows us to achieve the same result without this unnecessary separation. The Solution We can effectively use the .sort() method in combination with conditional logic to order our jobs. Here’s how to do it: We will pass a comparison function to the .sort() method. Inside this function, we will check whether each job includes the waiter role. Based on the presence of the role, we will sort accordingly: If both jobs include the waiter, sort by date. If only the first job includes waiter, it goes first. If only the second job includes waiter, it goes first. If neither includes waiter, sort them by date. Here's the complete implementation: [[See Video to Reveal this Text or Code Snippet]] Explanation of the Code Role Definition: We first define the roles as constants for better readability. Use of .sort(): The sort function compares each pair of jobs based on the criteria mentioned above. Date Comparison: We convert the date strings into Date objects to accurately compare them. Conclusion Sorting an array of objects based on complex criteria in JavaScript doesn't always require splitting the array into smaller arrays. With the clever use of the .sort() method and conditional logic, you can achieve a clean and efficient solution. Feel free to experiment with this sorting method in your projects, and you may find it handy whenever you handle similar data structures!