How to use the intersection of arrays? Summarize the usage of intersection examples of arrays

In the project, the intersection of multiple arrays needs to be obtained, so this example is only suitable for specific scenarios. For example, A array var a = {1000,10001,10002,10003}; B array var b = {10002, 10003}; C array var c = {10003}; You need to obtain the intersection array of these three arrays. The specific idea is: first initialize the smallest array as the A array, and the smallest number of elements is also the length of the array A. Then iterate through each array, obtain the shortest length of these arrays as the minimum length, and obtain the shortest length array at the same time. Then, iterate the minimum array and each array, start to compare the elements for equality, and use a counter to determine whether the element exists in each array and is the intersection element. The idea is relatively simple, but it can be achieved with multiple arrays to obtain intersection. The code is as follows: Html code < ;!DOCTYPE HTML PUBLIC "-//

1. JavaScript gets the intersection of multiple arrays

Introduction: JavaScript gets the intersection of multiple arrays

2. twinkle twinkle little star php array function sequence array_intersect returns two or Intersection array of multiple arrays

Introduction: twinkle twinkle little star:twinkle twinkle little star PHP array function sequence array_intersect returns the intersection array of two or more arrays: array_intersect () Definition and Usage The array_intersect() function returns the intersection array of two or more arrays. The resulting array contains all values ​​that are present in the compared array and are also present in all other parameter arrays. The key names are unchanged. : Only values ​​are used for comparison. Syntax array_intersect(array1,array2,array3

##3. http://www.hunanzhibo.com/ Compare two arrays in php Added function

#Introduction: http://www.hunanzhibo.com/:http://www.hunanzhibo.com/ Adding two arrays in php Function: Copy the code as follows:$value){ if(!array_key_e

4. colesafearray PHP array intersection array_intersect, array_intersect_assoc, array_inter_key function small problems

##Introduction: colesafearray: colesafearray PHP array intersection array_intersect, array_intersect_assoc, array_inter_key A small problem with the function: it returns an array with common elements in the intersection (only the arrays are worthy of comparison). The array_intersect_assoc() function binds the key value and the value and compares the intersection part together. The array_intersect_key() function compares the key values ​​of the two arrays. Compare and return an array of key-value intersections. However, some small problems have also been encountered in practical applications, as follows: Example: Copy the code as follows:<

5.

php Array Introductory Tutorial: Intersection of Associative Arrays

Introduction: PHP array introductory tutorial: Intersection of associative arrays

6.

php array_intersect() function usage code_PHP Tutorial

Introduction: PHP array_intersect() function usage code. array array_intersect (array array1, array array2 [, array ...]) The array_intersect() function returns the intersection array of two or more arrays. array_intersect() returns an array, the array

7.

Intersect of PHP array array_intersect(),array_intersect_assoc(),array_inte_PHP tutorial

Introduction: The intersection of PHP arrays array_intersect(), array_intersect_assoc(), array_inte. Returns an array with common elements in the intersection (only the array is worthy of comparison). The array_intersect_assoc() function binds the key value and the value and compares the intersection part together. The array_intersect_key() function is

8 .

Function to add two arrays in php_PHP tutorial

Introduction: A function that adds two arrays in PHP. Copy the code as follows: ?php function array_add($a,$b){ //Get the intersection of two arrays based on the key name $arr=array_intersect_key($a, $b); //Traverse the second array, if the key The name does not exist

9. php array function sequence array_intersect() returns the intersection array of two or more arrays_PHP tutorial

Introduction: PHP array function sequence array_intersect() returns the intersection array of two or more arrays. array_intersect() Definition and Usage The array_intersect() function returns an array of intersections of two or more arrays. The result array contains everything in the compared array and also appears in all other

10. php Two functions to calculate the intersection of two arrays_PHP tutorial

Introduction: PHP uses two functions to calculate the intersection of two arrays. , using array_intersect to find the intersection of two arrays is faster than using array_diff to find the union of the same two arrays. If you require the number of difference sets between array $a and array $b, you should use

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