Example usage

#Syntax $m = new AssocArrayMapper($func_callback, $arr1, $arr2, ..); # up to $arr10. Have not found a way to pass unlimited number args by reference

#Simple mapping $a = array('a' => 1, 'b' => 2); $b = array('a' => 3, 'b' => 4); $c = array('a' => 5, 'b' => 6);

$m = new AssocArrayMapper('AssocArrayMapperUtil::sum', $a, $b, $c); 
echo $m['a'];
# 9;

foreach($m as $k => $v) { 
    echo "$k: $v\n";
}
# a: 9
# b: 12

iterator_to_array($m);
# array('a' => 9, 'b' => 12);

#Nested mapping $negatives = new AssocArrayMapper('AssocArrayMapperUtil::negate', $b); $m = new AssocArrayMapper('AssocArrayMapperUtil::sum', $a, $negatives);

iterator_to_array($m);
# array('a' => -2, 'b' => -2);

#Pass arrays as reference to reduce memory usage $mem_start = memory_get_usage(); $large_array1 = array_fill(10000, 20000, 's1'); $large_array2 = array_fill(10000, 20000, 's2'); $mem_create_array = memory_get_usage(); $array_mem = $mem_create_array - $mem_start;

$m = new AssocArrayMapper('AssocArrayMapperUtil::concat', $large_array1, $large_array2);
$mem_create_mapper = memory_get_usage();
$mapper_mem = $mem_create_mapper - $mem_create_array;

echo "array bytes: $array_mem\n";
echo "mapper bytes: $mapper_mem\n";
# array bytes: 5325312
# mapper bytes: 2648