Illuminate\Support\Collection For example, most of the parameters of laravel’s kernel are passed by collections, but this does not mean that collections are good. As a fast and elegant development framework, laravel has a certain reason, not because of its routing, DB, listener and so on. When you need to deal with a set of arrays, you may need it to help you quickly solve practical problems.
$collection = collect([1, 2, 3]);
Obviously, this is a very simple operation, please stop. If you want to say “this operation is very complicated”, it is more similar to the declaration of early PHP5. X version.
$collection = array(1,2,3);
Laravel didn’t do anything complicated for collection, which will be in the next chapter “collection of laravel source code parsing”. Thank you
Return to the original
If you want to convert a collection into data, it’s also very easy to use
collect([1, 2, 3])->all(); ------> [1, 2, 3]
You can use the laravel set for performance considerations. After all, it will help you do 90% of the work of array operations.
For example, we need to divide an array into two or more arrays by a horizontal line. You can use sets to do ～
$collection = collect([1, 2, 3, 4, 5, 6, 7]); $chunks = $collection->chunk(4); $chunks->toArray(); // [[1, 2, 3, 4], [5, 6, 7]]
And some methods are designed according to the query mode of SQL statements. Let’s take a look at the specific methods.
Here is a list of some common collection operation methods. Please operate the official for details and all.
|all||Return the set to the prototype|
|average & avg||Calculate the average|
|chunk||Splits a collection into small collections of a specified size|
|collapse||To combine a collection of arrays into a collection of arrays|
|combine||You can combine the values of one set as keys and the values of another array or set as values into a set|
|concat||Appends the given array or collection value to the end of the collection|
|contains||Determines whether the set contains a given entry|
|count||Returns the total number of items in the collection|
|dd||Prints the items of the collection and ends the script execution|
|diff||Compare the set with other sets or pure PHP arrays, and then return the values that exist in the original set but do not exist in the given set|
|each||Iterate over the contents of the collection and pass it to the callback function|
|filter||Use the given callback function to filter the contents of the collection, leaving only those that pass the given real test|
|first||Returns the first element in the collection that passes a given real test|
|groupBy||Groups the items in the collection according to the given key|
|push||Adds the given value to the end of the collection|
|put||Sets the given key value pair within the collection|
|sortBy||Sorts the collection by the given key. The sorted collection retains the original array key|
|where||Filter the collection by the given key value|
Thank you for reading here. I hope this article can help you. Thank you. Why don’t you practice the assembly?