multi dimensional array question [General]

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From: Richard Quadling on 1 May 2010 15:59

On 30 April 2010 23:57, Nick Balestra <nick(a)beyounic.com> wrote:
> us_census = array('NY' => array('New York' => 8008278),
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 'CA' => array('Los Angeles' => 3694820,
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 'San Diego' => 1223400),
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 'IL' => array('Chicago' => 2896016),
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 'TX' => array('Houston' => 1953631,
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 'Dallas' => 1188580,
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 'San Antonio' => 1144646),
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 'PA' => array('Philadelphia' => 1517550),
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 'AZ' => array('Phoenix' => 1321045),
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 'MI' => array('Detroit' => 951270));

<?php
$us_census = array ( ... );

function Sum($a, $b) {
return $a + (is_array($b) ? array_reduce($b, 'Sum') : $b);
}

echo array_reduce($us_census, 'Sum');
?>

outputs ...

23899236

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-----
Richard Quadling
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