laravel-5

Collections 208
map() {#collection-method}
The map 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:
.
1 $collection = collect([1, 2, 3, 4, 5]);
2
3 $multiplied = $collection->map(function ($item, $key) {
4 return $item * 2;
5 });
6
7 $multiplied->all();
8
9 // [2, 4, 6, 8, 10]
Note: Like most other collection methods, map returns a new collection instance; it does
not modify the collection it is called on. If you want to transform the original collection,
use the transform method.
merge() {#collection-method}
The merge method merges the given array into the collection. Any string key in the array matching
a string key in the collection will overwrite the value in the collection:
.
1 $collection = collect(['product_id' => 1, 'name' => 'Desk']);
2
3 $merged = $collection->merge(['price' => 100, 'discount' => false]);
4
5 $merged->all();
6
7 // ['product_id' => 1, 'name' => 'Desk', 'price' => 100, 'discount' => false]
If the given array’s keys are numeric, the values will be appended to the end of the collection:
.