laravel-5

Collections 294
first() {#collection-method}
The first method returns the first element in the collection that passes a given truth test:
1 collect([1, 2, 3, 4])->first(function ($value, $key) {
2 return $value > 2;
3 });
4
5 // 3
You may also call the first method with no arguments to get the first element in the collection. If
the collection is empty, null is returned:
1 collect([1, 2, 3, 4])->first();
2
3 // 1
flatMap() {#collection-method}
The flatMap method iterates through the collection and passes each value to the given callback. The
callback is free to modify the item and return it, thus forming a new collection of modified items.
Then, the array is flattened by a level:
1 $collection = collect([
2 ['name' => 'Sally'],
3 ['school' => 'Arkansas'],
4 ['age' => 28]
5 ]);
6
7 $flattened = $collection->flatMap(function ($values) {
8 return array_map('strtoupper', $values);
9 });
10
11 $flattened->all();
12
13 // ['name' => 'SALLY', 'school' => 'ARKANSAS', 'age' => '28'];