<?php
namespace Exercise_One;
/**
* Zillow exercise one
*
* Take an associative array and sort it based on columns and directions specified. (PSR1 Standard)
*
* @author Joe Rocha <joe.rocha@me.com>
*/
class Singleton {
/**
* @var Singleton The reference to *Singleton* instance of this class
*/
protected static $instance;
/**
* Returns sorted multidimensional, associative array
*
* @param array $array Data to sort.
* @param string $sortKey Key to sort by.
* @param string $dir Direction to sort ('ASC' || 'DESC').
* @param bool $nat Natural sorting.
*
* @return array sorted by sortBy().
*/
public static function sortBy( &$array, $sortKey, $dir = 'ASC', $nat = false ) {
if ( null === static::$instance ) {
static::$instance = new static();
};
function sortLogic( $key, $dir, $nat ) {
return function( $a, $b ) use ( $key, $dir, $nat ) {
if ( true === $nat ){
return strnatcmp( ( 'ASC' === $dir ? $a : $b )[$key], ( 'ASC' == $dir ? $b : $a )[$key] );
} else {
return $dir === 'ASC' ? $a[$key] > $b[$key] : $a[$key] < $b[$key];
}
};
}
uasort( $array, sortLogic( $sortKey, $dir, $nat ) );
return static::$instance;
}
/**
* Make constructor private, so no one can call "new Class".
*/
private function __construct() {}
/**
* Make clone magic method private, so no one can clone instance.
*/
private function __clone() {}
/**
* Make sleep magic method private, so no one can serialize instance.
*/
private function __sleep() {}
/**
* Make wakeup magic method private, so no one can unserialize instance.
*/
private function __wakeup() {}
}
// Dummy Data for testing
$data = array();
$data[] = array('id' => 1, 'number' => '1', 'street' => 'Battery St', 'unit' => '1', 'rent' => 1200);
$data[] = array('id' => 10, 'number' => '10', 'street' => 'Battery St', 'unit' => '3', 'rent' => 1800);
$data[] = array('id' => 2, 'number' => '2', 'street' => 'Leavenworth St', 'unit' => '11', 'rent' => 800);
$data[] = array('id' => 12, 'number' => '12', 'street' => 'Battery St', 'unit' => '10', 'rent' => 3400);
$data[] = array('id' => 1, 'number' => '14', 'street' => 'Leavenworth St', 'unit' => '10', 'rent' => 1450);
$data[] = array('id' => 1, 'number' => '01', 'street' => 'Battery St', 'unit' => '5', 'rent' => 1000);
// Sanity check
Singleton::sortBy( $data, 'number', 'DESC', true );
print_r( $data );
preferences:
44.96 ms | 402 KiB | 5 Q