Comparison of java replication methods

1. Background In the actual programming process, we often encounter this situation: there is an object A, at A certain time A already contains some valid values, at this time, we may need A new object B exactly the same as A, and any change to B will not affect the value in A, that is to say, A and B are two independent objects, but the initia ...

Posted on Fri, 08 Nov 2019 03:52:03 -0500 by Tarsonis21

Programming job 20191104082520 (branch and jump) to blog

1 Write a program to read the input, stop reading the #character, and report the number of spaces, line breaks, and all other characters read. #include<stdio.h> int main(void) { char ch; int e=0,n=0; while( (ch=getchar())!='#' ){ if( ch=='e' ) e=1; else{ if( ch=='i' & ...

Posted on Thu, 07 Nov 2019 21:07:13 -0500 by Buddha443556

Spring Security and Spring Session

Extend JSON-based login The client and server timed out and authentication failed due to prolonged interaction on the server.However, the user does not want to jump to the login interface for login, expecting to login in the current interface pop-up window and proceed to the next step. Solution: When the server intercepts the request to discove ...

Posted on Thu, 07 Nov 2019 16:46:44 -0500 by abushahin

Group decision SDUT discrete mathematics OJ4171

Group decision Time Limit: 1000 ms Memory Limit: 65536 KiB Submit Statistic Problem Description Let d be a set of nonnegative subnumbers, and let binary operation + be modular M addition. Given D and M, we ask if the algebraic system v = < D, + > constitutes a group. If so, then we find the inverse element of the given el ...

Posted on Thu, 07 Nov 2019 16:32:50 -0500 by aiwebs

go object oriented programming

A program is a world with many objects (variables) Description of object-oriented programming in Golang 1) Golang also supports object-oriented programming (OOP), but it is different from traditional object-oriented programming, and it is not a pure pair oriented programming Like language. So we say that it is more accurate for Golang to suppor ...

Posted on Thu, 07 Nov 2019 14:51:26 -0500 by thumrith

Transfer closure SDUT discrete mathematics OJ4175

Transitive closure Time Limit: 1000 ms Memory Limit: 65536 KiB Submit Statistic Problem Description It is known that there are n cattle, m times of combat relationship. Ask the number of cattle that can finally determine the ranking. Input For multiple groups of test data, for each group of test data, input two integers n (1 ...

Posted on Thu, 07 Nov 2019 13:55:46 -0500 by Gighalen

Detail the three classic modes in PHP

Singleton mode The meaning of the singleton pattern:As an object creation mode, the singleton mode ensures that a class has only one instance and instantiates itself and provides this instance to the entire system globally.Instead of creating a copy of the instance, it returns a reference to the instance stored inside the singleton class.Three ...

Posted on Thu, 07 Nov 2019 13:20:24 -0500 by gabeg

Tool classes for common operation methods on File files in C#

scene Use of common read and write file methods for File classes in C# https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/99693983 Note: Blog Home Page:https://blog.csdn.net/badao_liumang_qizhiFocus on Public NumberDomineering program apeGet programming-related e-books, tutorial pushes, and free downloads. Realization Get the extension o ...

Posted on Thu, 07 Nov 2019 12:42:44 -0500 by jj33

Judgement subgroup SDUT discrete mathematics OJ4172

Judgement subgroup Time Limit: 1000 ms Memory Limit: 65536 KiB Submit Statistic Problem Description Given a finite group s and one of its subsets S1, the binary operation * on S is defined as the modular M addition operation to determine whether the subset is a subgroup of S. (definition of subgroup: let H be a non empty subset ...

Posted on Thu, 07 Nov 2019 11:29:06 -0500 by jphilapy

[java] dynamic planning: find the longest common sub column

**Example: * * given two sequences, for example X = ABCBDAB, Y = BDCABA, find the length of their longest common subsequence. Subsequence: in the given two parent sequences, for example, sequence BCAB has appeared in the parent string ABCBDAB and BDCABA, and the order of occurrence is consistent with the parent string, ...

Posted on Thu, 07 Nov 2019 10:35:28 -0500 by phatpappy