Laravel 8 whenNotEmpty() {#collection-method}

2021-07-19 09:52 更新

whenNotEmpty 方法当集合不为空时，将执行给定的回调函数：

$collection = collect(['michael', 'tom']);

$collection->whenNotEmpty(function ($collection) {
    return $collection->push('adam');
});

$collection->all();

// ['michael', 'tom', 'adam']


$collection = collect();

$collection->whenNotEmpty(function ($collection) {
    return $collection->push('adam');
});

$collection->all();

// []


$collection = collect();

$collection->whenNotEmpty(function ($collection) {
    return $collection->push('adam');
}, function ($collection) {
    return $collection->push('taylor');
});

$collection->all();

// ['taylor']

与 whenNotEmpty 相反的方法，请查看 whenEmpty 方法。

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← Laravel 8 whenEmpty() {#collection-method}

Laravel 8 where() {#collection-method} →

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Laravel 8 whenNotEmpty() {#collection-method}

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