La función Ds\Map::merge() es una función incorporada en PHP que se usa para devolver el resultado de agregar todas las asociaciones dadas.
Sintaxis:
Ds\Map public Ds\Map::merge( $values )
Parámetro: esta función acepta valores de $de parámetro único que contiene el objeto transitable o una array.
Valor de retorno: esta función devuelve la asociación de todas las claves de un objeto o array transitable dado con sus valores correspondientes, combinados con la instancia actual.
Los siguientes programas ilustran la función Ds\Map::merge() en PHP:
Programa 1:
<?php // Create new map $map = new \Ds\Map(["a" => 12, "b" => 15, "c" => 18, "d" => 20]); // Merge the map element and display it print_r($map->merge(["a" => 1, "c" => 2, "f" => 3])); // Display the set element print_r($map) ?>
Producción:
Ds\Map Object
(
[0] => Ds\Pair Object
(
[key] => a
[value] => 1
)
[1] => Ds\Pair Object
(
[key] => b
[value] => 15
)
[2] => Ds\Pair Object
(
[key] => c
[value] => 2
)
[3] => Ds\Pair Object
(
[key] => d
[value] => 20
)
[4] => Ds\Pair Object
(
[key] => f
[value] => 3
)
)
Ds\Map Object
(
[0] => Ds\Pair Object
(
[key] => a
[value] => 12
)
[1] => Ds\Pair Object
(
[key] => b
[value] => 15
)
[2] => Ds\Pair Object
(
[key] => c
[value] => 18
)
[3] => Ds\Pair Object
(
[key] => d
[value] => 20
)
)
Programa 2:
<?php // Create new map $map = new \Ds\Map(["1" => "Geeks", "2" => "for", "3" => "Geeks"]); // Merge the map element and display it print_r($map->merge(["a" => "Computer", "b" => "Science", "c" => "Portal"])); ?>
Producción:
Ds\Map Object
(
[0] => Ds\Pair Object
(
[key] => 1
[value] => Geeks
)
[1] => Ds\Pair Object
(
[key] => 2
[value] => for
)
[2] => Ds\Pair Object
(
[key] => 3
[value] => Geeks
)
[3] => Ds\Pair Object
(
[key] => a
[value] => Computer
)
[4] => Ds\Pair Object
(
[key] => b
[value] => Science
)
[5] => Ds\Pair Object
(
[key] => c
[value] => Portal
)
)
Referencia: https://www.php.net/manual/en/ds-map.merge.php