Sort Process

Comparative function

name	income
John	$50,000
Marry	$60,000
Peter	$100,000
Donald	$80,000


->pipe(new Sort(array(
    "income"=>function($a, $b) {
        if ($a < $b) return 1;
        else if ($a === $b) return 0;
        else if ($a > $b) return -1;                
    }
)))

name	income
Peter	$100,000
Donald	$80,000
Marry	$60,000
John	$50,000