laravel-5

Collections 221
Note: toArray also converts all of its nested objects to an array. If you want to get the
underlying array as is, use the all method instead.
toJson() {#collection-method}
The toJson method converts the collection into JSON:
.
1 $collection = collect(['name' => 'Desk', 'price' => 200]);
2
3 $collection->toJson();
4
5 // '{"name":"Desk","price":200}'
transform() {#collection-method}
The transform method iterates over the collection and calls the given callback with each item in the
collection. The items in the collection will be replaced by the values returned by the callback:
.
1 $collection = collect([1, 2, 3, 4, 5]);
2
3 $collection->transform(function ($item, $key) {
4 return $item * 2;
5 });
6
7 $collection->all();
8
9 // [2, 4, 6, 8, 10]
Note: Unlike most other collection methods, transform modifies the collection itself. If you
wish to create a new collection instead, use the map method.
unique() {#collection-method}
The unique method returns all of the unique items in the collection: