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<?php |
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/** |
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* CSVelte: Slender, elegant CSV for PHP |
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* |
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* Inspired by Python's CSV module and Frictionless Data and the W3C's CSV |
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* standardization efforts, CSVelte was written in an effort to take all the |
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* suck out of working with CSV. |
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* |
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* @version v${CSVELTE_DEV_VERSION} |
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* @copyright Copyright (c) 2016 Luke Visinoni <[email protected]> |
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* @author Luke Visinoni <[email protected]> |
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* @license https://github.com/deni-zen/csvelte/blob/master/LICENSE The MIT License (MIT) |
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*/ |
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namespace CSVelte\Collection; |
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use function CSVelte\is_traversable; |
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/** |
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* Class NumericCollection |
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* |
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* @package CSVelte\Collection |
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* @todo $this->set('foo', 'bar'); should throw an exception because only |
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* numeric values are allowed. Either that or converted to int. |
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*/ |
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class NumericCollection extends AbstractCollection |
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{ |
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protected function isConsistentDataStructure($data) |
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{ |
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if (!is_traversable($data)) { |
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return false; |
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} |
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foreach ($data as $val) { |
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if (!is_numeric($val)) { |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* Increment an item. |
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* |
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* Increment the item specified by $key by one value. Intended for integers |
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* but also works (using this term loosely) for letters. Any other data type |
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* it may modify is unintended behavior at best. |
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* |
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* This method modifies its internal data array rather than returning a new |
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* collection. |
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* |
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* @param mixed $key The key of the item you want to increment. |
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* @param int $interval The interval that $key should be incremented by |
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* @return $this |
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*/ |
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public function increment($key, $interval = 1) |
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{ |
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$val = $this->get($key, null, true); |
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for ($i = 0; $i < $interval; $i++) { |
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$val++; |
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} |
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$this->set($key, $val); |
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return $this; |
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} |
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/** |
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* Decrement an item. |
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* |
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* Frcrement the item specified by $key by one value. Intended for integers. |
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* Does not work for letters and if it does anything to anything else, it's |
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* unintended at best. |
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* |
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* This method modifies its internal data array rather than returning a new |
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* collection. |
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* |
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* @param mixed $key The key of the item you want to decrement. |
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* @param int $interval The interval that $key should be decremented by |
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* @return $this |
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*/ |
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public function decrement($key, $interval = 1) |
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{ |
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$val = $this->get($key, null, true); |
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for ($i = 0; $i < $interval; $i++) { |
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$val--; |
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} |
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$this->set($key, $val); |
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return $this; |
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} |
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/** |
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* Get the sum. |
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* |
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* @return mixed The sum of all values in collection |
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*/ |
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public function sum() |
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{ |
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return array_sum($this->toArray()); |
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} |
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/** |
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* Get the average. |
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* |
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* @return float|int The average value from the collection |
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*/ |
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public function average() |
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{ |
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return $this->sum() / $this->count(); |
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} |
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/** |
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* Get the mode. |
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* |
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* @return float|int The mode |
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*/ |
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public function mode() |
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{ |
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$counts = $this->counts()->toArray(); |
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arsort($counts); |
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$mode = key($counts); |
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return (strpos($mode, '.')) ? floatval($mode) : intval($mode); |
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} |
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/** |
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* Get the median value. |
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* |
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* @return float|int The median value |
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*/ |
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public function median() |
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{ |
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$count = $this->count(); |
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$data = $this->toArray(); |
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natcasesort($data); |
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$middle = $count / 2; |
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$values = array_values($data); |
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if ($count % 2 == 0) { |
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// even number, use middle |
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$low = $values[$middle - 1]; |
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$high = $values[$middle]; |
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return ($low + $high) / 2; |
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} |
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// odd number return median |
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return $values[$middle]; |
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} |
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/** |
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* Get the maximum value. |
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* |
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* @return mixed The maximum |
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*/ |
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public function max() |
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{ |
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return max($this->data); |
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} |
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/** |
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* Get the minimum value. |
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* |
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* @return mixed The minimum |
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*/ |
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public function min() |
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{ |
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return min($this->data); |
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} |
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/** |
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* Get the number of times each item occurs in the collection. |
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* |
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* This method will return a NumericCollection where keys are the |
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* values and values are the number of times that value occurs in |
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* the original collection. |
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* |
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* @return NumericCollection |
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*/ |
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public function counts() |
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{ |
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return new self(array_count_values($this->toArray())); |
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} |
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} |
nozavroni /
csvelte
