Ds \ Map::union()函數是PHP中的內置函數,用於創建包含兩個映射的並集的新映射。
用法:
Ds\Map Ds\Map::union( $map )
參數:該函數接受單個參數$map,該參數用於保存實例的其他映射以與當前實例結合。
返回值:它返回一個包含兩個映射的並集的映射。
以下示例程序旨在說明PHP中的Ds \ Map::union()函數:
程序1:
<?php
// Declare a new map
$a = new \Ds\Map(["a" => 1, "b" => 3, "c" => 5]);
// Declare another new map
$b = new \Ds\Map(["a" => 2, "c" => 3, "d" => 6]);
// Print the Union of two map
echo("Union of both map is:\n");
print_r($a->union($b));
?>
輸出:
Union of both map is:
Ds\Map Object
(
[0] => Ds\Pair Object
(
[key] => a
[value] => 2
)
[1] => Ds\Pair Object
(
[key] => b
[value] => 3
)
[2] => Ds\Pair Object
(
[key] => c
[value] => 3
)
[3] => Ds\Pair Object
(
[key] => d
[value] => 6
)
)
程序2:
<?php
// Declare a new map
$a = new \Ds\Map(["a" => "Geeks", "b" => "for", "c" => "Geeks"]);
// Declare another new map
$b = new \Ds\Map(["b" => "Computer", "e" => "Science", "f" => "Portal"]);
// Print the union of two map
echo("Union of both map is:\n");
print_r($a->union($b));
?>
輸出:
Union of both map is:
Ds\Map Object
(
[0] => Ds\Pair Object
(
[key] => a
[value] => Geeks
)
[1] => Ds\Pair Object
(
[key] => b
[value] => Computer
)
[2] => Ds\Pair Object
(
[key] => c
[value] => Geeks
)
[3] => Ds\Pair Object
(
[key] => e
[value] => Science
)
[4] => Ds\Pair Object
(
[key] => f
[value] => Portal
)
)
參考: https://www.php.net/manual/en/ds-map.union.php
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注:本文由純淨天空篩選整理自R_Raj大神的英文原創作品 PHP | Ds\Map union() Function。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。
