Programmer Think

HTML5 web storage, a better local storage than cookie s. What is HTML5 Web Storage? HTML5 enables users to store browsing data locally. Earlier, cookie s were used for local storage. But Web storage needs to be more secure and fast. These data will not be saved on the server, but they are only used for users to request website data. It can also ...

The Web SQL database API is not part of the HTML5 specification, but it is an independent specification that introduces a set of APIs that operate client database using SQL. Core approach The following are the three core approaches defined in the specification: openDatabase: This method creates a database object using an existing database or a ...

Raw data Data volume mysql> select count(*) as total from ad_visit_history; +---------+ | total | +---------+ | 1187096 | //There are more than 1.18 million pieces of data in total +---------+ 1 row in set (0.04 sec) Table file size stored on hard disk [root@BlackGhost test1]# ls |grep visit |xa ...

Opening chapter If you pay attention to the catalogue, you will know that composition is a new beginning.In the process of system code design, we organize code through inheritance, parent class and subclass, which correspond to the overall specification and specific requirements of the business. Therefore, we need to combine classes according t ...

Summary   HashMap is one of the most commonly used container classes in Java development and a frequent visitor to interviews.It's actually the preceding " Notes on Data Structure and Algorithms (2) The implementation of Hash List in JDK 1.8 uses the Chain List method to handle hash conflicts, and it is optimized to turn a chain list int ...

The environment of this blog is arbitrary.       Subject Linux Package Management       A software management tool     1 Compile and Install 2 rpm Package Management 3yum Management      2. Software Running and Compiling   Binary interface for 1ABI applications   Binary interface for ABI:Applicati ...

Catalog @ 1. The server supports only one client connection Server-side program (server.py): import socket # Create a server-side socket object server = socket.socket() # Bind IP (ipocnfig command looks at IP address) and port (custom network port can be used without conflicting with an existing system port) server.bin ...

Date Processing Class Date class Current date and time java.util.Date import java.util.Date; public class TestDemo { public static void main(String [] args) { Date date = new Date(); System.out.println(date); } } Operation results: Sat Jun 29 21:56:04 CST 2019 The above results represent the current date and time, ...

php-Personnel Rights Management (RBAC) Permission management can think of VIP as a function of vip. Ordinary users and VIP users have different functions. Five tables are generally used: user table, role table, function table, and related tables: user and role table, role and function table. The five tables I use are as follows:               ...

What is design pattern? Typical solutions to classical scenarios that often occur in software development are called design patterns. How to Learn Design Patterns Typical scenarios - > Typical problems - > Typical solutions polymorphic Used to eliminate logical statements. Polymorphism (ploymorphism) is a biological concept, referring to ...