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<?php
/**
* Author: git@ashbeats
* Date: 6/12/2019
* Time: 10:46 PM
*/
$testCases = [
'123Adggaaabaaaaaaabbc' => 'a',
'aaabbb' => 'a', // a
'baaabbb' => 'b', // b
'baaa1111111111bbb' => '1', // 1
'baaa1111111111bbb-----------------' => '1', // 1
'baa##a11111111^^11bbb' => '1', // 1
'baa##a1111 1111^^11bbb' => '1', // 1
'ជុន ចាន់បុត្រ apple អ្នកវិភាគដ៏ឆ្នើម ដែលគួរចង់ស្ដាប់' => 'p', // p
];
/**
* Simple way to solve it.
*
* @param $string
*
* @return mixed
*/
function method_1(string $string): string
{
preg_match_all( '/[a-zA-Z0-9]/i', $string, $results, PREG_PATTERN_ORDER );
$counts = array_count_values( $results[ 0 ] );
$max = 0;
foreach ( $counts as $char => $seen ) {
$max = ( $seen > $max ) ? $seen : $max;
}
return array_search( $max, $counts, true );
}
/***
* This is the shortest version for now in php...
*
* @param $string
*
* @return mixed
*/
function method_2(string $string): string
{
preg_match_all( '/[a-zA-Z0-9]/i', $string, $results, PREG_PATTERN_ORDER );
$counts = array_count_values( $results[ 0 ] );
return array_search(
max( array_values( $counts ) ),
$counts,
true
);
}
/******
* Run the tests below.
*/
$passed = true;
foreach ( $testCases as $seed => $expected ) {
$a = method_1( $seed );
$b = method_2( $seed );
if ( $a !== $b ) {
echo "Both methods yielded different results. Hmm... \n";
}
if ( $a !== $expected ) {
$passed = false;
echo " ✘ Failed for seed: $seed\n";
echo "\t - Expected was: $expected\n";
echo "method_1 failed. Returned ($a) \n";
break;
}
if ( $b !== $expected ) {
$passed = false;
echo " ✘ Failed for seed: $seed\n";
echo "\t - Expected was: $expected\n";
echo "method_2 failed. Returned ($b) \n";
break;
}
}
if ( $passed ) {
echo "\n ✔ All tests passed!\n\n";
}
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