ramsey /
collection
| @@ 141-153 (lines=13) @@ | ||
| 138 | * |
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| 139 | * @return mixed the head of this queue, or null if this queue is empty |
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| 140 | */ |
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| 141 | public function poll() |
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| 142 | { |
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| 143 | if ($this->count() === 0) { |
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| 144 | return null; |
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| 145 | } |
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| 146 | ||
| 147 | $head = $this[$this->index]; |
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| 148 | ||
| 149 | unset($this[$this->index]); |
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| 150 | $this->index++; |
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| 151 | ||
| 152 | return $head; |
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| 153 | } |
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| 154 | ||
| 155 | /** |
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| 156 | * Retrieves and removes the head of this queue. This method differs |
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| @@ 163-174 (lines=12) @@ | ||
| 160 | * @return mixed the head of this queue |
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| 161 | * @throws NoSuchElementException |
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| 162 | */ |
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| 163 | public function remove() |
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| 164 | { |
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| 165 | if ($this->count() === 0) { |
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| 166 | throw new NoSuchElementException('Can\'t return element from Queue. Queue is empty.'); |
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| 167 | } |
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| 168 | $head = $this[$this->index]; |
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| 169 | ||
| 170 | unset($this[$this->index]); |
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| 171 | $this->index++; |
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| 172 | ||
| 173 | return $head; |
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| 174 | } |
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| 175 | ||
| 176 | /** |
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| 177 | * Returns the type associated with this collection |
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