Arbitrary Length Integer Addition and Subtraction Operations

Topic Requirements: Design an algorithm to realize an arbitrary length of integers for addition and subtraction operations of the demonstration program. For example, the addition results of 1234, 5123, 4512, 3451, 2345 and - 1111, 1111, 1111, 1111, 1111 and 1111 are 0123, 4012, 3401, 2340, 1234. The bas ...

Posted by countrygyrl on Mon, 23 Sep 2019 07:22:48 +0200

Instructions for the use of commons.lang3

ArchUtils (System Information Tool Class for Java Running Environment) getArch(); // Get 32 bit, 64 bit, unknown computer processor architecture getType(); // Returns processor types x86, ia64, ppc, unknown is32Bit(); // Check if the processor is 32 bits is64Bit(); // / Check whether the process ...

Posted by kennethl on Mon, 23 Sep 2019 07:19:45 +0200

SpringBoot 2.1.7 Startup Process Source Analysis - Overview

brief introduction SpringBoot is widely used in today's development process. It simplifies the configuration of our development and makes it easy for us to complete a large number of complex development tasks. But most people just know it, but don't know why, so this article through the start-up proce ...

Posted by jeremyphphaven on Mon, 23 Sep 2019 06:23:04 +0200

Spring source Spring AOP

AOP aspect-oriented programming, relative to OOP object-oriented programming. Spring AOP exists to decouple. AOP allows a group of classes to share the same behavior. In OOP, code coupling can only be enhanced by inheriting classes and implementing interfaces, and class inheritance can only be a single inheritance, which prevents more behaviors ...

Posted by trillion on Mon, 23 Sep 2019 05:32:52 +0200

Logging system EFK follow-up: monitoring online logs

In the previous article EFK follow-up of log system: monitor alarm monitoring In this paper, we have basically completed the construction and testing of efk monitoring and alarm system. Then, when we switch the log source to online log, there are big problems. The CPU usage rate of fluentd is still high, and the alarm message in kafka is growin ...

Posted by karldesign on Mon, 23 Sep 2019 05:26:46 +0200

Record the process of configuring ubuntu18-server once

Article directory Summary Step 1: Modifying Software Sources Step 2: Solving the Problem of Boot Card Step 3: Set up root account Step 4: configuring network systems (wifi and static ip) Installation driver Configuring Wireless Network Card with netplan Make the configured system an iso image ...

Posted by Niko on Mon, 23 Sep 2019 05:26:32 +0200

Using Python crawler to automatically crawl daily stock ownership data of Shanghai and Hong Kong Stock Exchange

https://www.hkexnews.hk/sdw/search/searchsdw_c.aspx The website supports inquiring about the daily holding data of Shanghai and Hong Kong Stock Exchange Stock Holdings Institutions/Securities Firms, which is valid for less than one year. Popularly speaking, it is said in the news that the number of stoc ...

Posted by Vermillion on Sun, 22 Sep 2019 10:15:26 +0200

Programming and Variables of Shell Scripts (Plus Practical Projects)

The purpose of this chapter is to learn programming specifications, scripting operations and knowledge of variables. I. Overview of Shell scripts II. The Role of Shell Write the first Shell script 1. Write a script (go to the BOOT directory, view the current location, and display all files starting with VML in a long format friendly) [root@ ...

Posted by mescal on Sun, 22 Sep 2019 10:09:16 +0200

Talk about what I think mixin s are used in projects

Talk about what I think mixin s are used in projects All three questions are what is a mixin?What does mixin do?How does mixin work? What is mixin? In a nutshell, mixins are mixtures. Using mixins reduces duplicate code and improves code reuse What does mixin do? For example, I'm writing an erp system, which has a lot of tables and has page bre ...

Posted by jini01 on Sun, 22 Sep 2019 05:02:53 +0200

Qt Writing Custom Control 57-Histogram Waveform

1. Preface Histogram control is not an original control. There are about 20-30 controls in the control range which are not original by themselves, but refer to the open source code on the Internet and tidy up and perfect themselves. The code of the plug-in has been added so that it can be integrated directly into QtDesigner or QtCreator.The mai ...

Posted by sri2002 on Sun, 22 Sep 2019 03:52:40 +0200