Ds\Set::union

(PECL ds >= 1.0.0)

Ds\Set::union — Creates a new set using values from the current instance and another set

public Ds\Set::union(Ds\Set $set): Ds\Set

Creates a new set that contains the values of the current instance as well as the values of another set.

A ∪ B = {x: x ∈ A ∨ x ∈ B}

A new set containing all the values of the current instance as well as another set.

示例 #1 Ds\Set::union() example


<?php
$a = new \Ds\Set([1, 2, 3]);
$b = new \Ds\Set([3, 4, 5]);

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

以上例程的输出类似于：

object(Ds\Set)#3 (5) {
  [0]=>
  int(1)
  [1]=>
  int(2)
  [2]=>
  int(3)
  [3]=>
  int(4)
  [4]=>
  int(5)
}

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