set::extract cakephp

Question

I have an array in this structure:

Array (
[0] => Array
    (
        [cd_bibliotem] => Array
            (
                [codiceBiblio] => 119179
                [codiceTematica] => 3106
            )

    )

[1] => Array
    (
        [cd_bibliotem] => Array
            (
                [codiceBiblio] => 119178
                [codiceTematica] => 3106
            )

    ) [...]

I want to have one array with all codiceBiblio values, I've tried this:

$t = Set::extract($t, '{n}.cd_bibliotem');

But I get:

Array (
[0] => Array
    (
        [codiceBiblio] => 119179
        [codiceTematica] => 3106
    ) [...]

what's the right syntax to get just the codiceBiblio values?

Answer 1

$t2 = Set::classicExtract($t,'{n}.cd_bibliotem.codiceBiblio')

alternatively:

$t2 = array(null);

foreach($t as $thing)
{
    $t2[] = $thing['cd_bibliotem']['codiceBiblio'];
}

Answer 2

Only your arguments are wrong

I want to have one array with all codiceBiblio values, I've tried this:

$t = Set::extract($t, '{n}.cd_bibliotem');

The array path specified in the question points at an array - just change the path to point at a specific value, and you'll get a flat array as a return value:

$t = Set::extract($t, '{n}.cd_bibliotem.codiceBiblio');

Which will return:

array(
    119179,
    119178,
    ...
)

This is almost identical to the example for both Set::extract and Hash::extract (Hash replaces Set in 2.2, though both exist for backwards-compatibility) in the documentation.