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##  whenNotEmpty 方法當集合不為空時，將執行給定的回調函數：

whenNotEmpty 方法當集合不為空時，將執行給定的回調函數：

```
$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']
```

與 whenNotEmpty 相反的方法，請查看 whenEmpty 方法



                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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