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Completed
Push — master ( fc5653...e1c659 )
by Thomas
23:54
created

ReservoirSamplingIterator::getIterator()   B

↳ Parent: ReservoirSamplingIterator

Complexity

Conditions 5
Paths 6

Size

Total Lines 18
Code Lines 13

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
dl 0
loc 18
rs 8.8571
c 0
b 0
f 0
cc 5
eloc 13
nc 6
nop 0
1 
<?php
2 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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namespace Gielfeldt\Iterators;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class ReservoirSamplingIterator implements \IteratorAggregate

            


            
                                                                                                            
                            
            
                                    
            
            

                
                    6
                

                                    
                                                    
                
                
                
{

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    private $count;

            


            
                                                                                                            
                            
            
                                    
            
            

                
                    8
                

                                    
                                                    
                
                
                
    private $iterator;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public function __construct(\Traversable $iterator, int $count)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->iterator = new IteratorIterator($iterator);

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->count = $count;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
                    15
                

                                    
                                                    
                
                
                

            


            
                                                        
            
                                    
            
            

                
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    public function getIterator()

            


            
                                                        
            
                                    
            
            

                
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    {

            


            
                                                        
            
                                    
            
            

                
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        $result = new \ArrayIterator();

            


            
                                                        
            
                                    
            
            

                
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        $this->iterator->rewind();

            


            
                                                        
            
                                    
            
            

                
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        $index = 0;

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
0 ignored issues

                            –
                            show
                        


                        

                                                                                        




    

        
            Unused Code
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
$index is not used, you could remove the assignment.
                                                                                                

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
This check looks for variable assignements that are either overwritten by other
assignments or where the variable is not used subsequently.


$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}





Both the $myVar assignment in line 1 and the $higher assignment in line 2
are dead. The first because $myVar is never used and the second because
$higher is always overwritten for every possible time line.


                        

                                                    

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        while ($this->iterator->getIndex() < $this->count && $this->iterator->valid()) {

            


            
                                                        
            
                                    
            
            

                
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            $result->append($this->iterator->current());

            


            
                                                        
            
                                    
            
            

                
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            $this->iterator->next();

            


            
                                                        
            
                                    
            
            

                
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        }

            


            
                                                        
            
                                    
            
            

                
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        while ($this->iterator->valid()) {

            


            
                                                        
            
                                    
            
            

                
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            $newIndex = (int) rand(0, $this->iterator->getIndex());

            


            
                                                        
            
                                    
            
            

                
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            if ($newIndex < $this->count) {

            


            
                                                        
            
                                    
            
            

                
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                $result[$newIndex] = $this->iterator->current();

            


            
                                                        
            
                                    
            
            

                
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            }

            


            
                                                        
            
                                    
            
            

                
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            $this->iterator->next();

            


            
                                                        
            
                                    
            
            

                
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        }

            


            
                                                        
            
                                    
            
            

                
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        return $result;

            


            
                                                        
            
                                    
            
            

                
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    }

            


            
                                                        
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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