ralphmoran

<?php

/**
 * Given a square matrix, calculate the absolute difference between the sums of its diagonals.
 *
 * @param array $matrix
 * @return integer
 */
function diagonal_difference(array $matrix)
{

ralphmoran

<?php

class Pipeline
{
    /**
     * Executes a pipeline of functions.
     *
     * @return void
     */
    public static function makePipeline()

ralphmoran

<?php

function parseCsv( string $csv, string $delimiter) 
{
    return str_getcsv($csv, $delimiter);
}

$csv = 'a,b,c,"d,e",f,g';
$parsedArray = parseCsv($csv, ',');

ralphmoran

<?php

$haystack = 'abcdefghijklmnopqrstuvwxy';
$needles  = array('z', 'g', 'a', 'r');

array_walk($needles, function($needle) use ($haystack) {
    print strpos($haystack, $needle) !== FALSE ? "'{$needle}' exist in haystack" : "'{$needle}' does not exist";
});

ralphmoran

<?php

class Palindrome
{
    /**
     * Validates is a word is a palindrome.
     *
     * @param [type] $word
     * @return boolean
     */

ralphmoran

<?php

function sortByPriceAscending(string $jsonString) : string
{
    $items = json_decode($jsonString);

    usort($items, function($a, $b)
    {
        $cmp = $a->price - $b->price;

ralphmoran

<?php

class CategoryTree
{
    /** @var array $categoryTree */
    private $categoryTree = [];

    /**
     * Adds new root category or creates a parent-child relationship.
     *

ralphmoran

<?php

$files = [
    'blah.gif',
    'my.file.gif',
    'my.file.jpg',
    'this/is/a/path',
    'my.file.xlsx',
    'this/is/a/path',
    'my.file.php',

ralphmoran

<?php

class First {}
class Second {}
class Third extends Second {}
class Fourth {}

$userClasses = array_filter(
    get_declared_classes(),
    function($className) {

ralphmoran

<?php

class First {}
class Second {}
class Third extends Second {}
class Fourth {}

$userClasses = array_filter(
    get_declared_classes(),
    function($className) {