集合是”macroable”的,这意味着我们可以在运行时动态添加方法到Collection类,例如,下面的代码添加了toUpper方法到Collection类: useIlluminate\Support\Str;Collection::macro('toUpper',function(){return$this->map(function($value){returnStr::upper($value); }); });$collection=collect(['first','second']);...
By converting the collection to a LazyCollection, we avoid having to allocate a ton of additional memory. Though the original collection still keeps its values in memory, the subsequent filters will not. Therefore, virtually no additional memory will be allocated when filtering the collection's ...
Laravel Version: 7.0.7 PHP Version: 7.3.15 PHPUnit Version: 8.5.2 Expected behavior: Collections toArray() method should convert a collection to a plain array and all of the collection's nested objects that are an instance of Arrayable t...
Laravel 的集合 Collection简介Illuminate\Support\Collection 类提供了一个更具可读性的、更便于处理数组数据的封装。具体例子看下面的代码。我们使用了 collect 函数从数组中创建新的集合实例,对其中的每个元素运行 strtoupper 函数之后再移除所有的空元素:$...
创建集合 默认我们model查出来的就是集合,创建也很简单:辅助函数 collect 为给定数组返回一个新的 Illuminate\Support\Collection 实例$collection = collect([1, 2, 3]); map(), reject()使用辅助函数 collect 创建一个新的集合实例,为每一个元素运行 strtoupper 函数,然后移除所有空元素...
combine方法会将一个集合中的 keys 和另外一个集合或数组中的 values 相结合: $collection=collect(['name','age']);$combined=$collection->combine(['George',29]);$combined->all();// ['name' => 'George', 'age' => 29] contains() ...
The collect method is especially useful when you have an instance of Enumerable and need a non-lazy collection instance. Since collect() is part of the Enumerable contract, you can safely use it to get a Collection instance.combine()The combine method combines the values of the collection, ...
$collection=collect([ ['name' => 'Sally'],['school' => 'Arkansas'],['age' => 28] ]);$flattened=$collection->flatMap(function($values) {returnarray_map('strtoupper',$values); });$flattened->all();//['name' => 'SALLY', 'school' => 'ARKANSAS', 'age' => '28'];#18....
$collection = collect([ ['name' => 'Sally'], ['school' => 'Arkansas'], ['age' => 28] ]); $flattened = $collection->flatMap(function ($values) { return array_map('strtoupper', $values); }); $flattened->all(); // ['name' => 'SALLY', 'school' => 'ARKANSAS', 'age' ...
from EnumeratesValues ensure($type) No description from EnumeratesValues bool isNotEmpty() Determine if the collection is not empty. from EnumeratesValues mapSpread(callable $callback) No description from EnumeratesValues mapToGroups(callable $callback) No description from EnumeratesValues fl...