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<?php |
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/** |
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* CSVelte: Slender, elegant CSV for PHP |
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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 v0.2 |
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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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* @internal |
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*/ |
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namespace CSVelte; |
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/** |
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* CSVelte Utility Tool Belt |
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* |
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* This is a heinously ugly class full of static methods for performing various |
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* useful functions such as removing an element from an array by value, averaging |
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* the values of an erray, etc. |
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* |
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* *Note:* Don't get used to this class, it is almost certainly going away eventuallly |
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* |
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* @package CSVelte |
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* @subpackage Utilities |
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* @since v0.1 |
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* @internal |
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* @todo Either clean this up immensely, maybe by turning it into a collection |
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* object class or move them to namespaced functions. Or, if you can stomach |
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* the idea of adding another dependency, just use an existing utility |
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* library such as Underscore or something. |
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*/ |
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class Utils |
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{ |
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public static function array_get($arr, $key, $default = null, $throwException = false) |
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{ |
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if (array_key_exists($key, $arr)) { |
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return $arr[$key]; |
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} else { |
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if ($throwException) { |
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// @todo is this the correct exception to throw? |
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throw new \OutOfBoundsException('Unknown array index: ' . $key); |
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} |
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} |
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return $default; |
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} |
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public static function array_items($arr) |
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{ |
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$items = array(); |
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foreach ($arr as $key => $val) { |
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$items[] = array($key, $val); |
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} |
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return $items; |
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} |
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public static function average($arr) |
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{ |
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if (!is_array($arr)) throw new \InvalidArgumentException('"average" function expected array, got ' . gettype($arr)); |
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return array_sum($arr) / count($arr); |
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} |
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public static function array_average($arr) |
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{ |
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$return = array(); |
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foreach ($arr as $key => $val) { |
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$return[$key] = self::average($val); |
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} |
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return $return; |
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} |
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public static function mode($arr) |
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{ |
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if (!is_array($arr)) throw new \InvalidArgumentException('"mode" function expected array, got ' . gettype($arr)); |
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$vals = array(); |
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foreach ($arr as $key => $val) { |
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$vals[$val] = self::array_get($vals, $val, 0) + 1; |
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} |
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arsort($vals); |
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return key($vals); |
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} |
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public static function array_mode($arr) |
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{ |
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$return = array(); |
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foreach ($arr as $key => $val) { |
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$return[$key] = self::mode($val); |
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} |
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return $return; |
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} |
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/** |
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* Uses array_map to apply a callback to each character in a string |
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*/ |
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public static function string_map($str, Callable $callable) |
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{ |
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return join(array_map($callable, str_split($str))); |
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} |
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} |
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nozavroni /
csvelte
