ArticleZip > Sort An Array Of Objects In Angular2

Sort An Array Of Objects In Angular2

Sorting an array of objects in Angular2 is a common task when developing web applications. Thankfully, Angular2 provides us with built-in methods to easily achieve this. In this article, we will explore how to sort an array of objects in Angular2 effectively.

To begin sorting an array of objects in Angular2, you can use the array's `sort` method in conjunction with a custom compare function. This function allows you to specify the criteria based on which the array should be sorted. Let's take a look at an example:

Typescript

let users = [
  { name: 'Alice', age: 30 },
  { name: 'Bob', age: 25 },
  { name: 'Charlie', age: 35 }
];

users.sort((a, b) => a.age - b.age);

In this example, we have an array of user objects with `name` and `age` properties. We use the `sort` method on the `users` array and pass in a compare function that sorts the users based on their age in ascending order.

If you want to sort the array in descending order based on a specific property, you can adjust the compare function accordingly:

Typescript

users.sort((a, b) => b.age - a.age);

By swapping `b.age` and `a.age` in the compare function, we can achieve a descending order sort based on the `age` property.

Furthermore, if you need to sort the array based on a different property, you can easily modify the compare function to accommodate your requirements. For example, you can sort the array alphabetically based on the `name` property:

Typescript

users.sort((a, b) => a.name.localeCompare(b.name));

In this case, the `localeCompare` function is used to perform an alphabetical comparison based on the `name` property of the user objects.

Additionally, Angular2 provides a Pipe called the `OrderBy` pipe that simplifies sorting arrays in HTML templates. You can use this pipe to sort an array of objects directly in your Angular2 template without the need to write custom sorting logic in your component.

To use the `OrderBy` pipe, you can simply apply it to your array in the template like this:

Html

<div>
  {{ user.name }}
</div>

In this example, the `users` array is sorted alphabetically based on the `name` property using the `OrderBy` pipe within an `ngFor` directive in the template.

Sorting an array of objects in Angular2 can be a straightforward process with the built-in array methods and the `OrderBy` pipe. By utilizing these features effectively, you can easily arrange your data based on various criteria to meet your application's requirements.

Related posts:

×