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Laravel “Pipe Through” Collections Method

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Laravel “Pipe Through” Collections Method image

Laravel v8.78.1 introduces a new pipeThrough() collection method, allowing developers to insert an array of pipe callbacks that can manipulate the collection:

Recently merged into Laravel, you will soon be able to call collect()->pipeThrough($pipes) to run a collection through an array of callbacks, passing return values into following pipes 🤩 pic.twitter.com/5m9fThcoaw

— Steve Bauman (@SteveTheBauman) January 5, 2022

The author of the pull request, Steve Bauman, shared an additional example that might help you visualize example use-cases of this method:

$process = [
// Iterate through the health checks and attempt,
// filtering the collection by unsuccessful.
fn ($checks) => $checks->filter(
fn ($check) => ! $check->attempt()
),
 
// Iterate through all the unsuccessful checks
// notifying their users of each failed check.
fn ($unsuccessful) => $unsuccessful->each(
fn ($check) => $check->users()->each(
fn ($user) => $user->notify(
new HealthCheckFailed($check)
)
)
)
];
 
collect(HealthChecks::all())->pipeThrough($process);

The pipeThrough() method is a flexible way to run whatever collection code you have through a series of callbacks and invokable classes. Yet, the implementation is simple. Here’s the pipeThrough method in the Collection class at the time of release:

public function pipeThrough($pipes)
{
return static::make($pipes)->reduce(
function ($carry, $pipe) {
return $pipe($carry);
},
$this,
);
}

A related method in the Collection class is the pipe() method, which accepts a single callable and returns the result of the executed closure.

$collection = collect([1, 2, 3]);
 
$piped = $collection->pipe(function ($collection) {
return $collection->sum();
});

If you’d like to learn more about the pipeThrough method, check out Pull Request #40253. Also, you can see the complete list of changes between 8.78.0 and this week's 8.78.1 release on GitHub.

Paul Redmond photo

Staff writer at Laravel News. Full stack web developer and author.

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