Online PHP editor | rfc for pTClp

@ 2014-08-25T14:32:38Z

<?php

// Simple array merging
$array1 = [10, 50, 20, 40, 30];
$array2 = [1.0, 5.0, 2.0, 4.0, 3.0];
print_r(array_merge($array1, $array2));

// Sorting table-like arrays that has sorted by key elements
$table1 = [
  '2011:london'     => ['city' => 'London',     'year' => 2011, 'birthrate' => 'over9000'],
  '2012:birmingham' => ['city' => 'Birmingham', 'year' => 2012, 'birthrate' => 'wat'],
  '2013:london'     => ['city' => 'London',     'year' => 2013, 'birthrate' => 'boo boo']
];
$table2 = [
  '2011:london' => ['city' => 'London', 'year' => 2011, 'comment' => 1],
  '2012:london' => ['city' => 'London', 'year' => 2012, 'comment' => 22],
  '2014:london' => ['city' => 'London', 'year' => 2014, 'comment' => 333]
];
print_r(array_linear_merge($table1, $table2));

// New func for merging sorted by unique key table-like arrays!
// Complexity O(m+n), where m and n are sizes of each array.
function array_linear_merge($array1, $array2) {
  $iterator1 = new ArrayIterator($arrayLeft);
  $iterator2 = new ArrayIterator($arrayRight);
  $result = [];
  while ($iterator1->valid() && $iterator2->valid()) {
  	switch(sign(strcmp($iterator1->key(), $iterator2->key()))) {
  	  case 1: $result[] = $iterator2->current();
  	     $iterator2->next();
  	  break;
  	  case 0: $result[] = array_merge($iterator1->current(), $iterator2->current());
  	     $iterator1->next();
  	     $iterator2->next();
  	  break;
  	  case -1: $result[] = $iterator1->current();
  	      $iterator1->next();
  	  break;
  	}
  }
  if (!$iterator1->valid()) {
  	$iterator1 = $iterator2;
  }
  while ($iterator1->valid()) {
  	$result[] = $iterator1->current();
  	$iterator1->next();
  }
  return $result;
}

function sign($number) {
    return ($n > 0) - ($n < 0);
}

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => 10 [1] => 50 [2] => 20 [3] => 40 [4] => 30 [5] => 1 [6] => 5 [7] => 2 [8] => 4 [9] => 3 ) Warning: Undefined variable $arrayLeft in /in/pTClp on line 24 Fatal error: Uncaught TypeError: ArrayIterator::__construct(): Argument #1 ($array) must be of type array, null given in /in/pTClp:24 Stack trace: #0 /in/pTClp(24): ArrayIterator->__construct(NULL) #1 /in/pTClp(19): array_linear_merge(Array, Array) #2 {main} thrown in /in/pTClp on line 24
Process exited with code 255.

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