(c + + growth record) - C + + cast operators (static_cast, reinterpret_cast, const_cast and dynamic_cast)

C + + cast operator appendix Encyclopedia of professional vocabulary C languageC++PointerCast type reference Statement: some of the contents of this article are directly from references and are subject to infringement and deletion. C + + cast operators (static_cast, reinterpret_cast, const_cast and dynamic_cast) summary In my daily ...

Posted by batfastad on Sat, 19 Feb 2022 01:50:39 +0100

Processing of Python Programming constraints of simulated annealing algorithm

1. Optimization and linear programming The three elements of optimization problem are decision variables, objective function and constraints. Linear programming is an optimization method to study the extreme value problem of linear objective function under linear constraints. It is often used to solve the problem of using existing resources t ...

Posted by Bman900 on Fri, 18 Feb 2022 14:20:59 +0100

Linux based shell variables

1, shell variables and other related introduction 1. Compiled language and interpreted language Compiled language: compiled language is written before program execution. It needs a special compilation process to compile the program into machine language. For example, the exe format package of Windows. Interpretive language: interpretive la ...

Posted by gurroa on Fri, 18 Feb 2022 06:06:47 +0100

Multithreading has to talk about the Future class

Link: link. In high-performance programming, concurrent programming has become a very important part. When the performance of single core CPU has reached the limit, we can only further improve the performance of the system through multi-core, so concurrent programming is born. Because concurrent programming is more difficult and error pron ...

Posted by Chinese on Fri, 18 Feb 2022 04:29:02 +0100

Tiny RTC DS1307 clock module complete code (Arduino) and some points needing attention

In fact, this thing is OK, but there is no technical support. There will be holes in many details. It took me more than ten days (during which I also spent a week learning welding) to fully succeed. During this period, I was very angry. I thought I bought a piece of garbage and even wanted to throw away this 2 yuan thing. So I bought another on ...

Posted by FillePille on Thu, 17 Feb 2022 11:01:54 +0100

Platform management background and merchant menu resource management: access control design of platform management background

Access control design of platform management background The access control design here is implemented by spring security, which is not much different from the implementation method of the access control part in Chapter 10 SSO design. The difference is that OAuth 2 is not required here, and a simpler method is used for the design of permission ...

Posted by arsitek on Tue, 15 Feb 2022 08:10:50 +0100

Using PID and LQR controller to control multi rotor aircraft

Task content By adjusting PID and LQR controller to realize stable hovering of multi rotor aircraft, it is applied in both simulation and actual system. Reference content Basic reference content of LQR control part: LQR controller Reference link: Linear Quadratic Regulator (LQR) With Python Code Example design scheme A: Altitude and yaw ...

Posted by christine75 on Tue, 15 Feb 2022 01:15:10 +0100

Pandas tutorial - Financial Analysis Tutorial

Note: the tutorial content is from https://nbviewer.jupyter.org/github/twiecki/financial-analysis-python-tutorial/tree/master/ This is not a complete system pandas tutorial. The test demo of this foreign tutorial is old, and the new version of pandas may not be compatible with the source program. This tutorial is a correction based on the origi ...

Posted by masalastican on Mon, 14 Feb 2022 13:24:57 +0100

Java with Notes Chapter 1: Basic Operations

Preface Basic Operators These are common in most programming languages, but take them out and write one. Here, only some of the most commonly used operators are introduced, others are not commonly used to pick them up when they are used. Basic Operators 1. Common binary operators +, -, *, /,% 1. Addition Operator (Sum Operator)+ The ...

Posted by Doug G on Fri, 11 Feb 2022 19:42:36 +0100

An article on understanding Lua's object orientation

Copyright notice: This article is the original article of the blogger and follows CC 4.0 BY-SA Copyright agreement, please attach the original source link and this statement for reprint. Link to this article: https://blog.csdn.net/takashi77/article/details/116655240 Lua is a process oriented and functional programming language, because Lu ...

Posted by sxiix on Fri, 11 Feb 2022 15:20:12 +0100