How to convert an array of arrays or objects to an associative array?

Question

I\'m used to perl\'s map() function where the callback can assign both the key and the value, thus creating an associative array where the input was a flat array. I\'m aware of

Answer 1

As far as I know, it is completely impossible in one expression, so you may as well use a foreach loop, à la

$new_hash = array();

foreach($original_array as $item) {
    $new_hash[$item] = 'something';
}

If you need it in one expression, go ahead and make a function:

function array_map_keys($callback, $array) {
    $result = array();

    foreach($array as $item) {
        $r = $callback($item);

        $result[$r[0]] = $r[1];
    }

    return $result;
}