ScotlandPHP

Ds\Map::union

(PECL ds >= 1.0.0)

Ds\Map::unionCreates a new map using values from the current instance and another map.

Description

public Ds\Map Ds\Map::union ( Ds\Map $map )

Creates a new map that contains the pairs of the current instance as well as the pairs of another map.

A ∪ B = {x: x ∈ A ∨ x ∈ B}

Note:

Values of the current instance will be overwritten by those provided where keys are equal.

Parameters

map

The other map, to combine with the current instance.

Return Values

A new map containing all the pairs of the current instance as well as another map.

See Also

Examples

Example #1 Ds\Map::union() example

<?php
$a 
= new \Ds\Map(["a" => 1"b" => 2"c" => 3]);
$b = new \Ds\Map(["b" => 3"c" => 4"d" => 5]);

print_r($a->union($b));
?>

The above example will output something similar to:

Ds\Map Object
(
    [0] => Ds\Pair Object
        (
            [key] => a
            [value] => 1
        )

    [1] => Ds\Pair Object
        (
            [key] => b
            [value] => 3
        )

    [2] => Ds\Pair Object
        (
            [key] => c
            [value] => 4
        )

    [3] => Ds\Pair Object
        (
            [key] => d
            [value] => 5
        )

)
add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top