Just PHP FUN 043.

build_one_two_three.php

<?php
# https://www.codewars.com/kata/55be95786abade3c71000079 Linked Lists - Push & BuildOneTwoThre.
class Node {
  public $data, $next;
  public function __construct($data, $next = NULL) {
    $this->data = $data;
    $this->next = $next;
  }
}

function push($head, $data) {
  return new Node($data,$head);
}

function build_one_two_three() {
  return new Node(1,new Node(2,new Node(3)));
}

f.php

<?php
# https://www.codewars.com/kata/54df2067ecaa226eca000229 Gauß needs help! (Sums of a lot of numbers).
function f(...$n) {
  if(empty($n)) return false;
  $n = $n[0];
  if(!is_int($n)) return false;
  if(0 >= $n) return false;
   return (1+$n)*$n/2;
}

get_nth.php

<?php
#  https://www.codewars.com/kata/55befc42bfe4d13ab1000007 Linked Lists - Get Nth Node.
class Node {
  public $data, $next;
  public function __construct($data, $next = NULL) {
    $this->data = $data;
    $this->next = $next;
  }
}

function get_nth($node, $index) {
  for($i = 0; $node && $i < $index; $i++) $node = $node->next;
  if($node) return $node->data;
  throw new InvalidArgumentException("No index = $index in this list.");
}

just_php_fun_043.md

Just PHP FUN 043.

• https://www.codewars.com/kata/55befc42bfe4d13ab1000007 Linked Lists - Get Nth Node.
• https://www.codewars.com/kata/58e8cad9fd89ea0c6c000258 Kooka-Counter.
• https://www.codewars.com/kata/55be95786abade3c71000079 Linked Lists - Push & BuildOneTwoThre.
• https://www.codewars.com/kata/54df2067ecaa226eca000229 Gauß needs help! (Sums of a lot of numbers).
• https://www.codewars.com/kata/540c33513b6532cd58000259 Sum of all arguments.

Started at 22:24 07.07.2020 Tuesday July.
Finished at 23:21 07.07.2020 Tuesday July. (0hrs 57minutes).

kookaCounter.php

<?php
# https://www.codewars.com/kata/58e8cad9fd89ea0c6c000258 Kooka-Counter.
function kookaCounter($laughing) {
  if(empty($laughing)) return 0;
  $l = str_replace('a','',$laughing);
  $ans = 1;
  for($i = 1; $i < strlen($l); $i += 1) 
      if($l[$i-1] != $l[$i]) $ans += 1;
  return $ans;
}

sum.php

<?php
# https://www.codewars.com/kata/540c33513b6532cd58000259 Sum of all arguments.

function sum(...$x) {
  return array_sum($x);
}