Laravel 5 Collections: Merging Multiple Collection Values With merge Apr 22, 2018
The merge method merges the given items with the items in the collection. It replaces any item in the original collection if a string key with the same value exists in the supplied items. If the item keys are numeric, the new items will be added to the end of the collection. The merge method can accept either an array or a Collection instance, and it returns a new instance of Collection without modifying the original collection. The behavior of the merge method is similar to PHP's array_merge function.
Laravel 5 Collections: Modifying Collection Elements With transform Apr 22, 2018
The transform method in Laravel's Collection class allows you to modify the original collection instance by applying a callback function to each item. Unlike the map method, it does not return a new Collection instance. This is useful for tasks like changing the case of strings or bridging method arguments for incompatible APIs. The example demonstrates how to use the transform method to convert all strings in a collection to uppercase.
Laravel 5 Collections: Paginating Collections With forPage Apr 22, 2018
Learn how to use the forPage method in Laravel to implement pagination over collections. This method allows you to specify the desired page and number of items per page. Get a new collection instance containing the items for the specified page. You can also achieve similar results using the chunk method to divide the collection into smaller collections. Use the get method to retrieve a specific page. Easy and efficient pagination for your flat-file driven content management systems.
Laravel 5 Collections: Pair the Values of a Collection With the Values of Other Collections With zip Apr 22, 2018
The zip method in Laravel's Collection class is used to merge the values of two collections. It creates a new collection with elements placed at the corresponding index from the first collection. The zip method can accept multiple arguments of any data type that can be converted to an array. If the arguments have different lengths, null is used for missing values or extra values are added as a new collection.
Laravel 5 Collections: Randomizing Element Order With shuffle Apr 22, 2018
The shuffle method in Laravel is used to randomly rearrange the items of an array collection. It returns a new collection instance, without modifying the original collection. The method takes an optional seed parameter to determine the random order.
Laravel 5 Collections: Reducing a Collection Into a Collection of Key/Array-Value Pairs With mapToDictionary Apr 22, 2018
The mapToDictionary method in PHP allows you to create a dictionary-like structure from a collection of data, where each key maps to one or more values. The method takes a callback function that defines the relationship between the keys and values. The resulting collection contains key/value pairs, with the values stored as arrays. This method does not modify the original array, but returns a new collection with the dictionary structure.
Laravel 5 Collections: Reducing a Collection to One Element With reduce Apr 22, 2018
The reduce method is used to reduce a collection into a single item. It iterates over the collection and applies a callback function on each element. The method also provides an optional initial value parameter. The reduce method is similar to PHP's array_reduce function. Examples are provided to demonstrate the basic usage of the reduce method, including getting the sum and difference of elements in a collection. An example is also given to show how to get the product of each item in a collection.
Laravel 5 Collections: Removing a Portion of a Collection With splice Apr 22, 2018
The splice method in Laravel's Collection class allows you to remove a section of a collection and return the removed items as a new collection. It takes three parameters: $offset, $length, and $replacement. The $offset determines where to start removing items from the collection, and the $length controls how many items to remove. If provided, the $replacement parameter can be used to replace the removed items with new items.
Laravel 5 Collections: Removing Collection Elements With forget Apr 22, 2018
The forget method in Laravel's Collection class removes an item from the collection based on a given key. It modifies the original collection instance and returns a reference to it. A code example demonstrates how to use the forget method to remove an item from a collection, either by passing a string key or a numerical key.
Laravel 5 Collections: Retrieving a Portion of a Collection With slice Apr 22, 2018
The slice method in Laravel is used to return a portion of a collection starting at a given offset. The offset determines where to start when creating the new collection, and it can be positive or negative to start from the end of the original collection. The method returns a new instance of the Collection class without modifying the original collection. The slice method is similar to PHP's array_slice function. There is also an optional length parameter that allows developers to control the size of the returned Collection. Additionally, developers can choose to preserve the keys of the returned collection by passing true as the argument for the preserveKeys parameter.