Design pattern abstract factory pattern

Last article: Factory mode 1. What is abstract factory mode? In the last article, we also said that the abstract factory pattern can be said to be a super factory, through which other factories can be created. In the abstract factory pattern, the interface is the factory responsible for creating ...

Posted on Thu, 16 Jan 2020 00:35:04 -0800 by wiegs

Android Foundation: how to determine the unique identification code of Android device

This is a reprint of the article, the original link is as follows. In case of infringement, delete after contact.link The unique identification must satisfy two characteristics to solve the problem of locating the unique equipment perfectly, but the solution to this problem is doomed to be close to perf ...

Posted on Tue, 14 Jan 2020 23:08:12 -0800 by thepreacher

3D wind farm based on HTML5 + WebGL

Preface Wind energy is a kind of clean energy in development, which is inexhaustible. Of course, meteorological conditions and social and natural conditions should be taken into account first. In recent years, China's offshore and onshore wind power has developed rapidly. Sea water and land provide a good geological guarantee for our wind power ...

Posted on Sun, 12 Jan 2020 17:53:12 -0800 by soloslinger

Chuanglebo Robot Learning

Article Directory Explain Shortcut keys Start a new terminal Jump to Project Directory Code Location Chassis code Initial use Configure the IP address of the connection Open chassis to run program Sign in Function Open Keyboard Control Program Open debugging window Open Software Open Coordina ...

Posted on Sun, 12 Jan 2020 17:23:39 -0800 by samip1983

Product classification page

After the data is displayed, it is found that the time column is a time stamp, so a global filter should be written to convert the time stamp into time /* Define a global filter to change the timestamp passed from the background into a custom event style */ Vue.filter('dateFormat', function (originVal) ...

Posted on Fri, 10 Jan 2020 23:25:45 -0800 by west4me

Introduction to Warship+NPOI Import and Export Components [Objectification]

1. Overview 1) Standard import and export refers to the function of import and export based on standard components, which does not require extended development.At the same time, both import and export are entity-based and can be operated on by Excel through entity operations. 2) Feature introduction _ ...

Posted on Fri, 10 Jan 2020 18:55:29 -0800 by matt_4013

nginx + Tomcat load balancing -- Part 2

1, In general, a Tomcat site can not cope with the complex and diverse requests of too many customers due to possible single point of failure. It cannot be used in production environment alone. So we need a more reliable solution to improve the web site architecture. At present, many large enterprises use nginx server as direct ...

Posted on Wed, 08 Jan 2020 07:30:34 -0800 by irving

How to encapsulate many parameters into objects in the foreground and send them to the background for analysis

When there are too many incoming background parameters and these parameters belong to a certain class, these parameters can be encapsulated into an object to form an object array. In this way, the parameters of the object itself can be mapped one by one, and the encapsulated object array can be assigned to a parameter. Through ...

Posted on Tue, 07 Jan 2020 00:19:22 -0800 by blintas

Qt dynamic adsorption line

Implementation ideas: 1. To dynamically find the rectangle where the mouse is located, you must obtain the size and position attributes of each window and its child controls on the desktop. In order to obtain these attributes Qt, it seems that there is no relevant API provided. You can only use the windows API EnumWindows and ...

Posted on Mon, 06 Jan 2020 18:56:21 -0800 by neuro4848

Angry Product Manager: Has it been difficult to maintain elegance in the background?It doesn't exist!

Survival Status We know that there will be background killing on Android systems, and with the update of system versions, there will be an increasing trend in killing processes.The system's starting point is good because it saves memory, reduces power consumption, and avoids some rogue behavior. But for some applications, the scenario for the ...

Posted on Mon, 06 Jan 2020 18:45:29 -0800 by headrush