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Laravel Collection Public API: isEmpty
Learn how to use the isEmpty method in Laravel's Collection class to check if a collection is empty or not. By using this method, true will be returned if the collection is empty, otherwise false.
Laravel Collection Public API: jsonSerialize
The jsonSerialize method is used internally by the toArray method in PHP's JsonSerializable interface. This interface allows developers to define custom representations of a class when using the json_encode function. In the provided example, a new collection is created and the jsonSerialize method is used to obtain an array of its values. The resulting array would contain the values 'first', 'second', and 'third'.
Laravel Collection Public API: keys
The keys method in Laravel retrieves all the keys of the items in a collection. It returns a new Collection instance. You can use this method to get the keys of both indexed and associative arrays.
Laravel Collection Public API: last
The last method in Laravel's Collection class is used to retrieve the last item in a collection or the last item that matches a specified condition. It takes an optional callback function ($callback) to perform the truth test, and a default value argument ($default) to return when no matching items are found. If the collection is empty, null is returned, unless a default value is provided.
Laravel Collection Public API: lists
The lists method in Laravel is an alias of the pluck method. It retrieves a list of values from a collection. You can specify a property to become the value and another property to become the key in the resulting collection. There is also an example provided demonstrating the usage of the lists method to retrieve product names and versions from a collection. Another example shows how to get a new collection with the version as the value and the product name as the key.
Laravel Collection Public API: map
The map method in Laravel allows you to apply a given callback to each item in a collection, creating a new collection with the modified items. The provided callback should accept the item and its key as arguments. In the example, the map method is used to transform the case of each string in a collection to upper-case, resulting in a new collection with the modified values. The original collection remains unchanged.
Laravel Collection Public API: max
Learn how to use the max() method in Laravel to retrieve the maximum value of a given key. By default, the key is set to null, similar to PHP's max() function. Follow the provided code examples to see how to use the max() method without specifying a key or when specifying a key.
Laravel Collection Public API: merge
The merge method in Laravel allows you to combine the items in a collection with other items. If a string key with the same value already exists in the collection, it will be replaced. Numeric keys in the new items will be added to the end of the collection. You can pass an array or another Collection instance to the merge method, and it will return a new instance of Collection.
Laravel Collection Public API: min
The min method in Laravel is used to retrieve the minimum value of a given key. If no key is specified, it will return the minimum value of the collection. You can also use the min method to retrieve the minimum value of a specific key in a collection of arrays. For example, $min will contain the value 0 when the min method is called without specifying a key, and $min will contain the value 5.0 when called with the key 'version'.
Laravel Collection Public API: toArray
The toArray method in Laravel converts a collection or an object instance that implements the Arrayable interface into an array. It returns the underlying array that the collection instance is using. This method is useful when you need to work with the data in array format rather than a collection.
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