Laravel Collection Tutorial

1. What is a collection in laravel?
2. How do I access collections in laravel?
3. How do I combine two collections in laravel?
4. What is lazy collection in laravel?
5. Is empty in laravel?
6. How do I know if my eloquent is empty?
7. Is empty in PHP?
8. Is null laravel query?
9. How do you pluck in laravel?
10. How do I combine two eloquent collections?
11. What is plucking laravel?
12. How do you add two collections in Java?

What is a collection in laravel?

A collection is a laravel class that uses arrays internally and adds many features to them. You can create a collection simply by using collect method like this. ... You can apply all the collection helper method available in Laravel. When we apply helper methods on eloquent collections, they do not query the database.

How do I access collections in laravel?

1. where. You can use the where method to search a collection by a given key, pair value. ...
2. take. The take method takes an integer value and returns the specified number of items. ...
3. chunk. The chunk method breaks a collection into smaller collections of the size n. ...
4. map. ...
5. transform. ...
6. reduce. ...
7. union. ...
8. intersect.

How do I combine two collections in laravel?

How to Combine Multiple Collections in Laravel?

1. Count Syntax: $collecton->concat( Array OR Collection. );
2. Laravel Collection concat() Example. public function index() $collectionA = collect(["One"]); $collectionB = collect(["Two"]); $collectionC = collect(["Three"]); ...
3. Output: Illuminate\Support\Collection Object. ( [items:protected] => Array. (

What is lazy collection in laravel?

Laravel 6.0 introduced Lazy Collection. Lazy collection leverages PHP's Generators to allow you to work with a very large dataset and keeps the memory usages low. ... This method will allow you to iterate through your dataset records and will only execute a single query.

Is empty in laravel?

Starting from Laravel 5.3 you can simply use : if ($mentor->isNotEmpty()) //do something. This is the fastest way: if ($coll->isEmpty()) ...

How do I know if my eloquent is empty?

Check if Eloquent Relationship is Empty

if (is_null($user->mediaProfile)) ... //or $model->relation->count(); //or $model->relation()->exists() //or Model::has('relation')->get() //or if(!

Is empty in PHP?

Technical Details

Is null laravel query?

Check if null: whereNull

Laravel Eloquent provides a handy method called whereNull , which you could use to verify if a specific value of a given column is NULL.

How do you pluck in laravel?

$users = User::all()->pluck('username'); You can also use pluck() method on nested objects like relationships with dot notation. Laravel Pluck method can be very useful when you extract certain column values without loading all the columns. You can benefit from the Laravel pluck method in the blade views as well.

How do I combine two eloquent collections?

6 Answers. $original = new Collection(['foo']); $latest = new Collection(['bar']); $merged = $original->merge($latest); // Contains foo and bar. The merge() method on the Collection does not modify the collection on which it was called. It returns a new collection with the new data merged in.

What is plucking laravel?

How Does Laravel pluck() Work? The Laravel pluck () as the name suggests, extracts certain values, as suggested. It literally plucks the information out from the given array and produces it as an output.

How do you add two collections in Java?

One way to merge multiple lists is by using addAll() method of java. util. Collection class, which allows you to add content of one List into another List. By using addAll() method you can add contents from as many List as you want, it's best way to combine multiple List.