$collection= collect(['name' => 'taylor', 'framework' => 'laravel']);$value=$collection->get('name');//taylor#可以选择性地传递默认值作为第二个参数:$collection= collect(['name' => 'taylor', 'framework' => 'laravel']);$value=$collection->get('foo', 'default-value');//default-v...
$collection = collect(['name' => 'taylor', 'framework' => 'laravel']); $collection->get('email', function () { return 'default-value'; }); // default-value #24.has方法,判断集合中是否存在给定的键。 $collection = collect(['account_id' => 1, 'product' => 'Desk']); $collectio...
Laravel 的集合 Collection简介Illuminate\Support\Collection 类提供了一个更具可读性的、更便于处理数组数据的封装。具体例子看下面的代码。我们使用了 collect 函数从数组中创建新的集合实例,对其中的每个元素运行 strtoupper 函数之后再移除所有的空元素:$...
如上面的代码示例,Collection 类支持链式调用,一般来说,每一个 Collection 方法会返回一个全新的 Collection 实例,你可以放心地进行链接调用。创建集合如上所述,collect 辅助函数会利用传入的数组生成一个新的 Illuminate\Support\Collection 实例。所以要创建一个集合就这么简单:$collection = collect([1, 2, 3]...
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$collection->merge([1,2,3]); }); Therefore, in previous releases of Laravel, passing a closure to thewhenorunlessmethods meant that the conditional operation would always execute, since a loose comparison against a closure object (or any other object) always evaluates totrue. This often led...
concat 方法在数字上重新索引连接到原始集合上的项目的键。 要维护关联集合中的键,请参阅 merge 方法。contains()contains 方法确定集合是否包含给定项目。 您可以将闭包传递给 contains 方法,以确定集合中是否存在与给定真值测试匹配的元素:$collection = collect([1, 2, 3, 4, 5]); $collection->contains(...
Laravel中的Collection使用Composer管理,所以我们可以在项目中使用composer安装到非Laravel项目中,比如我们新建一个collections目录,通过下面使用命令安装 代码语言:javascript 复制 mkdir collections && cd collections composer require illuminate/support 执行完上面的命令将得到所需要的package。 使用 ...
The diffKeys method compares the collection against another collection or a plain PHP array based on its keys. This method will return the key / value pairs in the original collection that are not present in the given collection:$collection = collect([ 'one' => 10, 'two' => 20, '...
The Laravel team released v5.8.28 yesterday with new collection methods for merge and replacement, and the Tappable trait on TestResponse.