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Laravel 5 Collections Static API: Creating a Collection By Invoking a Callback a Given Number of Times With times
Learn how to use the times static method in Laravel's Collection class to easily create collections with a specified number of elements. The times method is similar to PHP's range function, but it provides additional functionality for collections. You can pass a $number argument to specify the number of elements and an optional $callback function to modify each element. Discover how to use the times method to populate a collection with a range of numbers or create a collection of Carbon date instances for the next few days. Be aware of potential duplicate dates when using the times method and consider storing the current date outside of the callback function.
Laravel 5 Collections Static API: Creating a New Collection Instance From Arrays Using make
The make static method in Laravel's Collection class creates a new collection instance with the provided items. If the argument is already a collection instance, it will be returned as is. You can use this method to easily create collections in your code. For example, you can create a collection from an array of items using Collection::make($items), and it will return a new collection instance.
Laravel 5 Collections Static API: Ensure a Value Is a Collection With wrap
The wrap static method in the Illuminate\Support\Collection class creates a collection from any value supplied to it. It is useful in situations where a collection instance is expected. For example, it can be used to ensure that function or method arguments are always a collection. It does not wrap a value if it is already a collection.
Laravel 5 Collections Static API: Returning the Items of a Collection With unwrap
The unwrap method in Laravel's Collection class allows you to access the underlying items of a collection. If the value provided is already a collection, its underlying items will be returned. If the value is not a collection, the value will be returned as is. This method can be useful when you want to ensure that an argument supplied to a function is always an array.
Laravel 5 Collections: Swapping Element Keys and Values With flip
The flip method in Laravel's Collection class returns a new instance of Collection with the keys and values swapped. It is similar to PHP's array_flip function. Using this method, you can easily reverse the order of items in a collection.
Laravel 5 Collections: Testing All Collection Values With every
The every method in Laravel is used to determine if each element of a collection passes a given truth test. It can accept a callback function or an operator and comparison value. For example, it can be used to check if all input characters are alphabetic or if all users in a collection are verified. It supports various operators like equality, not equal, less than, greater than, etc. The every method can also be used with higher order messaging to access properties on objects.
Laravel 5 Collections: The Public API
This section covers the public API of the Collection class in Laravel. It includes methods for retrieving collection elements, transforming the collection, pagination, and simple aggregate functions, among others. Some of the methods covered include retrieving elements with get, filtering elements with filter, grouping elements with groupBy, and sorting elements with sort.
Laravel 5 Collections: The Static API
Learn how to work with the static API of the Collection class in Laravel 5. This API provides helpful functions for creating new collection instances, ensuring a value is a collection, returning items of a collection, creating a collection by invoking a callback, and adding methods to the higher order message list. Simplify your code with these useful static functions.
Laravel 5 Collections: Transforming Collection Element Keys With keyBy
The keyBy method in Laravel is used to create a new collection instance where the keys of the new key/value pairs are determined by a callback function or a string value. This method does not change the original collection instance and will return a new modified instance. In the provided example, the keyBy method is used to create a new collection where each item is keyed by its id value. It can also be used with a callback function to perform more complex keying operations, such as generating a hash of each item's id.
Laravel 5 Collections: Transforming Collection Elements With map
The map method in Laravel's Collection class allows you to apply a callback function to each item in the collection and create a new collection with the modified items. The original collection remains unchanged. The callback function should accept the item and its key as its arguments. You can also use the map method in conjunction with higher order messages to transform objects into arrays. For example, you can transform an array of product objects into an array of their respective arrays using the map method.
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