<?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, $table2));
print_r(array_linear_merge2($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) {
$iterator1 = new ArrayIterator($array1);
$iterator2 = new ArrayIterator($array2);
$result = [];
while ($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 $result;
}
function array_linear_merge2($array1, $array2) {
reset($array1);
reset($array2);
$result = [];
while (current($array1) !== false && current($array2) !== false) {
switch(sign(strcmp(key($array1), key($array2)))) {
case 1: $result[] = current($array2);
next($array2);
break;
case 0: $result[] = array_merge(current($array1), current($array2));
next($array1);
next($array2);
break;
case -1: $result[] = current($array1);
next($array1);
break;
}
}
while ($next = next($array1)) {
$result[] = $next;
}
while ($next = next($array2)) {
$result[] = $next;
}
return $result;
}
function sign($number) {
return ($number > 0) - ($number < 0);
}
- Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- Array
(
[0] => 10
[1] => 50
[2] => 20
[3] => 40
[4] => 30
[5] => 1
[6] => 5
[7] => 2
[8] => 4
[9] => 3
)
Array
(
[0] => Array
(
[city] => London
[year] => 2011
[birthrate] => over9000
[comment] => 1
)
[1] => Array
(
[city] => Birmingham
[year] => 2012
[birthrate] => wat
)
[2] => Array
(
[city] => London
[year] => 2012
[comment] => 22
)
[3] => Array
(
[city] => London
[year] => 2013
[birthrate] => boo boo
)
[4] => Array
(
[city] => London
[year] => 2014
[comment] => 333
)
)
Array
(
[0] => Array
(
[city] => London
[year] => 2011
[birthrate] => over9000
[comment] => 1
)
[1] => Array
(
[city] => Birmingham
[year] => 2012
[birthrate] => wat
)
[2] => Array
(
[city] => London
[year] => 2012
[comment] => 22
)
[3] => Array
(
[city] => London
[year] => 2013
[birthrate] => boo boo
)
)
- Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
- Parse error: syntax error, unexpected '[' in /in/dP0s7 on line 4
Process exited with code 255. - Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
- Parse error: parse error, unexpected '[' in /in/dP0s7 on line 4
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error in /in/dP0s7 on line 4
Process exited with code 255.
preferences:
333.21 ms | 401 KiB | 464 Q