Using Higher-Order Messages for more expressive code in Laravel

Laravel has attracted much attention for its simplicity and powerful features. Among the many characteristics, high-level news is a pearl, which makes the code more expressive and simpler. This article will explore the application of high -level news and its readability in improving code.

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What is high -level news?

High -level messages It is a method that can call another method on each element of the set or object, without writing an explicit cycle. In other words, it is a grammatical shortcut that makes your code smoother and easier to read.

This feature is particularly useful when processing the set in Laravel, but it is also suitable for other contexts.

Classic Example: Collection

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Let's take a look at a simple example. Suppose you have a user collection, and you want to activate all the unsuccessful users. If there is no high -level news, you can write this:

Use high -level news, you can simplify this code into one line:

Here, is a method of gathering,

<code class="language-php">$users = User::where('active', false)->get();

foreach ($users as $user) {
    $user->activate();
}</code>

is a method you want to call on each element where the collection. High -level news avoids explicit circulation.

<code class="language-php">$users = User::where('active', false)->get();

$users->each->activate();</code>

Why use high -level messages?

each activate Simple code:

Reduce the number of code rows and eliminate unnecessary cycles.

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Readability: Code is more expressive and easier to understand.

lower error risk:

By avoiding manual circulation, you can reduce the risk of type errors or logical errors.
Practical examples
• <.> 1. Apply the method to each element of the collection
• Assuming you have a collection of orders, and you want to mark all orders as the already shipped:

<.> 2. Use how to filter the collection

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You can also use high -level messages to filter collection. For example, filtering users who have verified emails:

<.> 3. Use to convey

convert the collection to the results of each element application method. For example, get the full name of all users:

<code class="language-php">$orders = Order::where('status', 'pending')->get();

$orders->each->markAsShipped();</code>

Advanced usage

<.> 1. Method chain call

<code class="language-php">$verifiedUsers = $users->filter->hasVerifiedEmail();</code>

High -level messages can be used to perform complex operations with other collection methods. For example, to activate all the unsuccessful users and return their emails:

map <.> 2. Use the relationship with Eloquent together

You can also use high -level messages with Eloquent. For example, assuming that each user has multiple posts, and you want to post the posts to be published:

<code class="language-php">$fullNames = $users->map->getFullName();</code>

Limitation

Although the high -level message function is powerful, they also have some limitations:

• They are only suitable for methods that do not require additional parameters.
• They are mainly used for simple operations. For more complicated logic, it may be more appropriate to explicitly loop.

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Conclusion

High -level news is a little -known but extremely useful function in Laravel. They can make you write more expressive, simpler and more readable code, while reducing error risks. Whether you use a collection, Eloquent relationship or other objects, high -level news can greatly simplify your code.

Therefore, when writing the loop next time, ask myself: "Can I use high -level news here?"

Have you already used high -level news in the project? Please share your experience and use cases in the comments!

Don't forget to share this article with your colleagues of Laravel Developers and let them understand this practical skills. ?

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