Contents

<?php

/**
 * @param string $a
 * @param string $b
 * @return int distance
 */
function distance($a, $b)
{
    if (strlen($a) !== strlen($b)) {
        throw new InvalidArgumentException('DNA strands must be of equal length.');
    }

    return count(
        array_diff_assoc(
            str_split($a),
            str_split($b)
        )
    );
}

Version data entries

396 entries across 396 versions & 1 rubygems

Version	Path
trackler-2.2.1.139	tracks/php/exercises/hamming/example.php
trackler-2.2.1.138	tracks/php/exercises/hamming/example.php
trackler-2.2.1.137	tracks/php/exercises/hamming/example.php
trackler-2.2.1.136	tracks/php/exercises/hamming/example.php
trackler-2.2.1.135	tracks/php/exercises/hamming/example.php
trackler-2.2.1.134	tracks/php/exercises/hamming/example.php
trackler-2.2.1.133	tracks/php/exercises/hamming/example.php
trackler-2.2.1.132	tracks/php/exercises/hamming/example.php
trackler-2.2.1.131	tracks/php/exercises/hamming/example.php
trackler-2.2.1.130	tracks/php/exercises/hamming/example.php
trackler-2.2.1.129	tracks/php/exercises/hamming/example.php
trackler-2.2.1.128	tracks/php/exercises/hamming/example.php
trackler-2.2.1.127	tracks/php/exercises/hamming/example.php
trackler-2.2.1.126	tracks/php/exercises/hamming/example.php
trackler-2.2.1.125	tracks/php/exercises/hamming/example.php
trackler-2.2.1.124	tracks/php/exercises/hamming/example.php
trackler-2.2.1.123	tracks/php/exercises/hamming/example.php
trackler-2.2.1.122	tracks/php/exercises/hamming/example.php
trackler-2.2.1.121	tracks/php/exercises/hamming/example.php
trackler-2.2.1.120	tracks/php/exercises/hamming/example.php