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<?php |
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namespace Ianriizky\CodingInterview\DataSet; |
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use SplFixedArray; |
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class DataSet |
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{ |
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/** |
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* Current size of the collection. |
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* |
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* @var int |
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*/ |
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protected int $size = 0; |
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/** |
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* Collection of the data set. |
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* |
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* @var \SplFixedArray |
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*/ |
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protected SplFixedArray $collection; |
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/** |
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* Create a new instance class. |
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* |
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* @param int $initialSize |
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* @return void |
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*/ |
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public function __construct(int $initialSize = 10) |
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{ |
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$this->collection = new SplFixedArray($initialSize); |
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} |
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/** |
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* Add a value to the collection. |
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* |
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* @param mixed $value |
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* @return bool |
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*/ |
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public function add($value): bool |
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{ |
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if ($this->contains($value)) { |
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return false; |
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} |
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$this->ensureSize(); |
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$this->collection[$this->size] = $value; |
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$this->size++; |
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return true; |
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} |
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/** |
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* Determine whether the given value is exists on the collection or not. |
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* |
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* @param mixed $value |
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* @return bool |
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*/ |
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public function contains($value): bool |
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{ |
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foreach ($this->collection as $item) { |
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if ($value === $item) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Return size of collection. |
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* |
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* @return int |
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*/ |
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public function size(): int |
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{ |
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return $this->size; |
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} |
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/** |
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* Return collection of the data set. |
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* |
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* @return \SplFixedArray |
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*/ |
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public function collection(): SplFixedArray |
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{ |
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return $this->collection; |
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} |
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/** |
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* Remove a value from the collection. |
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* |
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* @param mixed $value |
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* @return bool |
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*/ |
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public function remove($value): bool |
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{ |
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if (!$this->contains($value)) { |
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return false; |
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} |
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$removedIndex = $this->indexOf($value); |
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for ($index = $removedIndex; $index <= $this->size; $index++) { |
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$this->collection[$index] = $this->collection[$index + 1]; |
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} |
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$this->size--; |
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return true; |
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} |
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/** |
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* Return index of given value. |
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* |
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* @param mixed $value |
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* @return int |
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*/ |
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protected function indexOf($value): int |
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{ |
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for ($index = 0; $index < $this->collection->count(); $index++) { |
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if ($value === $this->collection[$index]) { |
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return $index; |
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} |
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} |
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return -1; |
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} |
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/** |
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* Ensure that the data set size is enough to contain the collection. |
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* |
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* @return void |
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*/ |
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5 |
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protected function ensureSize(): void |
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{ |
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5 |
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if ($this->size < $this->collection->count()) { |
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return; |
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} |
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$tempCollection = new SplFixedArray($this->size + 1); |
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for ($index = 0; $index < $this->collection->count(); $index++) { |
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$tempCollection[$index] = $this->collection[$index]; |
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} |
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$this->collection = $tempCollection; |
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} |
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} |
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ianriizky /
coding-interview
