Just PHP FUN 070.

just_php_fun_070.md

Just PHP FUN 070.

• https://www.codewars.com/kata/521c2db8ddc89b9b7a0000c1 Snail Sort.

Started at 23:01 07.08.2020 Friday Aug.
Finished at 1:30 08.08.2020 Saturday Aug. ( 2hrs 29minutes)

snail.php

<?php
# https://www.codewars.com/kata/521c2db8ddc89b9b7a0000c1 Snail.
function snail(array $array): array {
  $size = count($array) * count($array[0]);
  $width = count($array[0]); $ans = [];
  $steps = []; $steps[] = $width; $width -= 1;
  for( ; $width > 0; $width -= 1){ $steps[] = $width; $steps[] = $width;}
  $i = 0; $j = -1;
  // var_dump($steps);
  for($x = 0; !empty($steps); $x += 1){
    $number = array_shift($steps); $dx = 0; $dy = 0;
    if(0 == $x % 4) {$dx = 0; $dy = 1;}
    else if (1 == $x % 4) {$dx = 1; $dy = 0;}
    else if (2 == $x % 4) {$dx = 0; $dy = -1;}
    else { $dx = -1; $dy = 0; }
    for($stp = 0; $stp < $number; $stp += 1){
      $i += $dx; $j += $dy;
      //echo "$i:$j:".$array[$i][$j]." ";
      array_push($ans,$array[$i][$j]);
    }
  }
  //echo "\n";
  return $ans;
  
}