Summarize about array and set note points

The following example demonstrates how to use the Union () method to determine whether an array is equal:/* Author by w3cschool.cc file name: Main.java */import java.util.arrays;import Java.util.hashset;import Java.util.set;public class Main {public static void main (string[] args) throws Exception {& N

1. Java instance-array and set

Summary: The following example demonstrates how to use the Union () method to determine whether an array is equal:

2. Summary of PHP Multiple array-set, intersection, and difference-set operation functions

Introduction: The Array function in PHP is really very much, the actual work to learn more about some of PHP's own existing functions, will greatly improve the speed of work. The function of how to handle the set, intersection, and difference of two or more arrays in PHP. (1) PHP computes a set of two or more arrays of combinations that combine two or more numbers into an array of result sets. Merging arrays in PHP generally uses both the Array_merge and the + operations. (2) PHP calculates the intersection intersection of two or more arrays, which is the portion of data that exists in two or more arrays.

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