Programmer Think

Insight into the latest and most valuable projects: This issue introduces the Zig programming language brief introduction Zig is a modern programming general purpose programming language and a strong competitor for C. Zig is a general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software. Hom ...

This topic is not difficult, but there is still something to learn to write simple and elegant code. Topic 1 Force buckle   class Solution: def cellsInRange(self, s: str) -> List[str]: ans = [] a,b,c,d = s[0],s[1],s[3],s[4] for i in range(ord(a), ord(c)+1): for j in range(int(b),int(d)+1): ...

Ideas of this paper How to implement dynamic proxy in jdk, cglib and spring. spring implements ProxyFactory details of dynamic agents. Understand the general idea of AOP implementation from the use of ProxyFactory. What is an agent Provide a proxy for other objects to control access to this object, enhance a method in a class, and extend the ...

Sample code: public class App { static Thread thread1 = new Thread(() -> System.out.println("thread1")); static Thread thread2 = new Thread(() -> System.out.println("thread2")); static Thread thread3 = new Thread(() -> System.out.println("thread3")); public static void main(String[] args) { thread1.start() ...

1, Introduction to Qt custom title bar The title bar of QWidget and its subclass form components is controlled by the operating system, that is, the interface style of the title bar is the same as the theme style of the operating system. In engineering practice, developers need to define it by themselves to beautify the application interface. ...

(3) Probability and information theory) 2, Linear algebra Purpose: it is mainly to reduce the dimension of data and restore or build the target with the least data 2.1 eigenvalue decomposition Only symmetric positive definite matrix can be decomposed into eigenvalues. Eigenvalue decomposition: A = P * B * PT, where B is the diagonal mat ...

1, Reflection mechanism 1. Overview of reflection mechanism 1.1 reflection mechanism 1.2 package of reflection mechanism related classes Reflection mechanism in Java lang.Class.* Bao Xia 1.3 important classes related to reflection mechanism 1.4 three ways to obtain Class package reflex; import java.util.Date; /** * To ...

1, User defined interface introduction UI design refers to the overall design of human-computer interaction, operation logic and beautiful interface of software. Excellent UI design not only makes the software personalized and tasteful, but also makes the operation of the software comfortable, simple and free, which fully reflects the position ...

1, Understand the basic introduction and main ideas of Spring IoC/DI 1. Understand the basic introduction of Spring (1) What is spring? Spring is an open source framework for lightweight DI/IoC and AOP containers. It is committed to building lightweight Java EE applications and simplifying application development. It covers traditional applica ...

1, Introduction to QtDBus QtDBus is a Unix only library that uses D-Bus protocol for inter process communication. It is the encapsulation and implementation of the underlying API of D-Bus. QtDBus module provides an interface extended by Qt signal slot mechanism. To use the QtDBus module, you need to add the following code to the code: #inclu ...