PHP Manual
Set
Creates a new set using values that aren't in another set

Ds\Set::diff

(PECL ds >= 1.0.0)

Ds\Set::diff — Creates a new set using values that aren't in another set

说明

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

Creates a new set using values that aren't in another set.

A \ B = {x ∈ A | x ∉ B}

参数

set: Set containing the values to exclude.

返回值

A new set containing all values that were not in the other set.

See Also

» Compliment on Wikipedia

范例

Example #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));
?>

以上例程的输出类似于：

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

相关文章

php dateperiod creates a new dateperiod object php domcomment creates a new domcomment object php domprocessinginstruction creates a new domprocessinginstruction object php deque creates a new deque using a callable to determine which values to include php map creates a new map using keys that aren t in another map php map creates a new map using a callable to determine which pairs to include php map creates a new map by intersecting keys with another map php map creates a new map using values from the current instance and another map php map creates a new map using keys of either the current instance or of another map but not of both php sequence creates a new sequence using a callable to determine which values to include php set creates a new instance php set creates a new set using values that aren t in another set php set creates a new set using a callable to determine which values to include php set creates a new set by intersecting values with another set php set creates a new set using values from the current instance and another set php set creates a new set using values in either the current instance or in another set but not in both php vector creates a new vector using a callable to determine which values to include php ncurses 函数 set new position and draw a horizontal line using an attributed character and max. n characters long php ncurses 函数 set new position and draw a vertical line using an attributed character and max. n characters long php imagick creates a new image as a copy

关注编程学问公众号