Sorting Javascript Arrays

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You can use the JavaScript sort () method to sort an array. The sort () method takes an array as an argument and sorts its values ‚Äã‚Äãin ascending order. Tables are sorted in place, which means that the original table is changed. A new table is not created.

You can choose to sort your table in a particular order. For example, you can have a list of names that you want to show the user in alphabetical order.

Depending on how you want to sort the elements of an array, there are built-in JavaScript functions that can help you. For example, you can use the sort () function to sort an array alphabetically, the reverse () function to sort an array in reverse order, and the sort () function with a nested function to create custom sorts.

In this tutorial, we will analyze how to use sort () and reverse () to perform a sort array function in JavaScript.

JavaScript sort () method

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The JavaScript sort () method reads values ‚Äã‚Äãfrom an array and returns those values ‚Äã‚Äãin ascending or descending order. You can sort a string containing numbers or strings.

Consider the following syntax:

This code sorts our list of "values" . The list is sorted in place, which means our original list has been modified. sort () does not create a new version of a list.

Note that the sort () method modifies the original array and changes its order. If we want to keep the same original array, we can run the sort () function and store its value in a new variable.

If you assign the contents of the sort () method to a new variable, the original list will still be modified.

Example JavaScript sort array

For sorting an array in JavaScript, we use the built-in default sort () method. In its simplest form, the sort () method sorts an array in ascending alphabetical order. Here is an example of the sort () method in action:

Our code returns the following:

Our array has been sorted é in ascending order. or the sort () method to sort our JavaScript variable called " students ". Next, we print the value of "students" in the JavaScript console .

JavaScript Array sort (): sort a numeric array

We can use sort () to sort the values ‚Äã‚Äãof a numeric list in ascending order.

Suppose we have a list of student grades that we want to sort in ascending order. We could sort them using the sort () method:

Our code output is as follows:

Our array has been sorted in ascending order! When our program starts the sort () operation, the elements in our array are sorted by their / values.

Since sort () sorts a list in place, it is not necessary to assign the result of sort () to a new variable. Our code prints the "votes" table to the console.

JavaScript Sort Array of Objects

The sort () method can be used to sort an array of objects. For example, we could have a series of JSON objects that store both a student’s name and age.

Here is an example of a sort () function which sorts an array of this type according to the age of our students:

Our code returns the following:

Our code returned our array of JSON objects sorted by student age.

In the first line, we declare our variable "students" with four students. Then create a function that ranks our students’ variable based on the value "age" in each JSON object comparing ages. Finally, our program prints our sorted list of students.

JavaScript Array sort (): Sort in reverse order

There is also a built-in JavaScript function that allows you to sort an array in reverse order: reverse ().

The reverse () method reverses an array so that the first element becomes the last and the last element becomes the first. Therefore, this array does not sort an array in descending alphabetical order.

If we first sort a list using the sort () method, we can use reverse () to see our array in descending order.

Here is an example of the reverse () function in action:

Our code returns the following:

First, we sort our list in ascending order using sort (). Next, let’s reverse the list using reverse (). Our list now displays our names in descending alphabetical order.

The reverse The function (), like the function sort (), changes the order of our list. We cannot assign the result of reverse () to a new variable without modifying the original array. We talked about this earlier with the sort () method.

Conclusion

The JavaScript sort () method sorts the contents of a list in ascending or descending order. sort () modifies a list in place, which means that the method does not create a new list. reverse (), when used after sort (), sorts a list in descending order.

In this tutorial, we have explained how to sort an array in JavaScript using sort (). We discussed sorting a numeric array, how to sort an array of objects, and using reverse () to reverse the contents of an array.

For tips on the best JavaScript learning resources and online courses, see our How to Learn JavaScript Article < / a>.

👻 Read also: what is the best laptop for engineering students?

We hope this article has helped you to resolve the problem. Apart from Sorting Javascript Arrays, check other array Python module-related topics.

Want to excel in Python? See our review of the best Python online courses 2023. If you are interested in Data Science, check also how to learn programming in R.

By the way, this material is also available in other languages:



Angelo Robinson

Tallinn | 2023-01-31

JavaScript is always a bit confusing 😭 Sorting Javascript Arrays is not the only problem I encountered. Checked yesterday, it works!

Ken Schteiner

Shanghai | 2023-01-31

Maybe there are another answers? What Sorting Javascript Arrays exactly means?. I just hope that will not emerge anymore

Jan Sikorski

Berlin | 2023-01-31

I was preparing for my coding interview, thanks for clarifying this - Sorting Javascript Arrays in Python is not the simplest one. I am just not quite sure it is the best method

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