PHP 합집합, 교집합, 차집합, 대칭차

Set operations with PHP Arrays
PHP 배열 집합 연산
PHP 합집합, 교집합, 차집합, 대칭차

1 테스트 환경[ | ]

$arr1의 원소는 A, B, C, D
$arr2의 원소는 C, D, E, F

테이블 생성 및 데이터 입력

PHP

Copy

$arr1 = ['A', 'B', 'C', 'D'];
$arr2 = ['C', 'D', 'E', 'F'];

2 합집합[ | ]

PHP

CPU

0.0s

MEM

22M

0.0s

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$arr1 = ['A', 'B', 'C', 'D'];
$arr2 = ['C', 'D', 'E', 'F'];
$union = array_unique(array_merge($arr1, $arr2));
print_r( $union );

Array
(
    [0] => A
    [1] => B
    [2] => C
    [3] => D
    [6] => E
    [7] => F
)

3 교집합[ | ]

PHP

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$arr1 = ['A', 'B', 'C', 'D'];
$arr2 = ['C', 'D', 'E', 'F'];
$intersection = array_values(array_intersect($arr1, $arr2));
print_r( $intersection );

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4 차집합[ | ]

PHP

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$arr1 = ['A', 'B', 'C', 'D'];
$arr2 = ['C', 'D', 'E', 'F'];
$complement = array_values(array_diff($arr1, $arr2));
print_r( $complement );

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5 대칭차집합[ | ]

PHP

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$arr1 = ['A', 'B', 'C', 'D'];
$arr2 = ['C', 'D', 'E', 'F'];
$sym_diff = array_values(array_diff(array_merge($arr1, $arr2), array_intersect($arr1, $arr2)));
print_r( $sym_diff );

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6 예제 코드[ | ]

PHP

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<?php
$arr1 = array('A', 'B', 'C', 'D');
$arr2 = array('C', 'D', 'E', 'F');

echo "<h3>Union</h3>";
$union = array_unique(array_merge($arr1, $arr2));
print_r($union);

echo "<h3>Intersection</h3>";
$intersection = array_values(array_intersect($arr1, $arr2));
print_r($intersection);

echo "<h3>Complement</h3>";
$complement = array_values(array_diff($arr1, $arr2));
print_r($complement);

echo "<h3>Symmetric difference</h3>";
$sym_diff = array_values(array_diff(array_merge($arr1, $arr2), array_intersect($arr1, $arr2)));
print_r($sym_diff);

예제: http://zetawiki.com/ex/php/set-operation.php

7 같이 보기[ | ]