Ds\Set::diff
(PECL ds >= 1.0.0)
Ds\Set::diff — Creates a new set using values that aren't in another set
説明
Creates a new set using values that aren't in another set.
A \ B = {x ∈ A | x ∉ B}
パラメータ
set
- Set containing the values to exclude.
返り値
A new set containing all values that were not in the other set
.
例
例1 Ds\Set::diff() example
<?php$a = new \Ds\Set([1, 2, 3]);$b = new \Ds\Set([3, 4, 5]);var_dump($a->diff($b));?>
上の例の出力は、 たとえば以下のようになります。
object(Ds\Set)#3 (2) { [0]=> int(1) [1]=> int(2) }