Qt--Implementation of Calculator

I. Computer Programming Interface AnalysisFrom the effect map we can see that1.QLineEdit is used to accept user input2.QLineEdit can get strings input by users3.QLineEdit is a functional component, requiring parent components as containers4.QLineEdit can locate in parent componentsThe coordinates and positions of the calculator are shown in th ...

Posted on Thu, 08 Aug 2019 22:28:35 -0400 by Wales

Set 10: Implement a set of ui component libraries (counter components) for pc-side vue from scratch

Episode 10: Implementation from scratch (counter component) This episode locates: Many people will not be impressed if they hear the name counter in a flash. After all, this component is used less, just like the one on the left'-'the one on the right'+', which is used to control a certain number of times. For example, the mall applet I did b ...

Posted on Thu, 08 Aug 2019 00:09:50 -0400 by akdrmeb

springboot+rabbitmq introduction (pure annotation implementation): how to deal with producer sending failure and consumer consumption failure

Message queues often fail to send and consume messages. These two problems can not be ignored in daily work. Failure of message sending: 1. Network jitter leads to the disconnection between producer and mq, resulting in no messages. Answer: rabbitmq has an automatic reconnection mechanism called r ...

Posted on Wed, 07 Aug 2019 05:33:33 -0400 by gregchet

creact-react-app scaffolding from scratch

Learn how to build a scaffold officially provided by react from scratch and add less configuration items and how to deal with bug s in the build process In this process, the yarn tool is used by default. Use the official command: (This process may be created at different times due to different personal network speeds) >yarn create react ...

Posted on Wed, 07 Aug 2019 03:58:51 -0400 by sn202

day78 Display and Hide

Review """ Items: 1. Analysis: the overall structure of the page - the page is divided into several blocks, each block of the general framework (first-level and second-level structure) 2. Projects can be done in blocks, and then integrated | in a page block completion-decoupling 3. reset Operations - Clear all default styles you can ...

Posted on Tue, 06 Aug 2019 21:00:26 -0400 by laura_richer

Less Learning - Extend

Extend Selector: extend (selector parameter) {} Extensions are pseudo-classes in less that combine selectors with selectors that match their references Simply put, when the selector parameters appear in the extension, the same rules will be given to the selector before the extension, which is equivale ...

Posted on Tue, 06 Aug 2019 07:36:32 -0400 by Percadan

epoll usage (service-side code explanation)

The following code is a reflex server that returns the information sent to it by the client to the client. #include <unistd.h> #include <sys/types.h> #include <fcntl.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <signal.h&gt ...

Posted on Mon, 05 Aug 2019 23:16:32 -0400 by BMurtagh

NOIP in-school Simulated Graceful Sequence &&P4747 [CERC2017]Intrinsic Interval

Title Description Lxy has N cows. He numbered N cows 1..N and i I cows i.In order to produce more milk, he would have the cows do morning exercises in a row every morning.The cows are randomly arranged.If the number in a range [L,R] is continuous from the smallest to the largest, he thinks the range is graceful.For example, the cows ar ...

Posted on Mon, 05 Aug 2019 18:43:09 -0400 by lordvader

nginx log analysis based on awk

nginx log analysis based on awk nginx log analysis based on awk Definition nginx log awk analysis example nginx log analysis based on awk In the process of system tuning, it is often necessary to analyze the request log of nginx, to count and analyze the amount of requests in each time period. ...

Posted on Mon, 05 Aug 2019 03:03:38 -0400 by adx

SSE Optimization Series 8: Using SSE to Optimize Multi-scale Detail Lifting Algorithms

Preface The original source of this article is from this blog I wrote before: https://blog.csdn.net/just_sort/article/details/85007555 There are algorithmic principles and common opencv implementations. Then this article is in SSE Optimizing Series 7: SSE Optimizing for Box Filtering( https://blog.cs ...

Posted on Mon, 05 Aug 2019 02:57:37 -0400 by mniessen