Programmer Think

introduce The full name of APScheduler is Advanced Python Scheduler. It is a lightweight Python timing task scheduling framework. APScheduler supports three scheduling tasks: fixed time interval, fixed time point (date), and cronab command under Linux. At the same time, it also supports asynchronous execution and background execution of schedu ...

1, Lambda expression 1. Examples of Lambda expressions @Test public void test1(){ Runnable r1 = new Runnable() { @Override public void run() { System.out.println("I Love Beijing Tiananmen "); } }; r1.run(); System.out.println("********************** ...

1, Introduction Particle swarm optimization (PSO) is a numerical optimization algorithm based on swarm intelligence. It was proposed by social psychologist James Kennedy and electrical engineer Russell Eberhart in 1995. Since the birth of PSO, it has been improved in many aspects. This part will introduce the basic principle and process of par ...

Title Description input (11,LL) (7,LLL) (8,R) (5,) (4,L) (13,RL) (2,LLR) (1,RRR) (4,RR) () (3,L) (4,R) () output 5 4 8 11 13 4 7 2 1 not complete Idea 1: implement binary tree in pointer mode (chain storage) First define a structure, and then define a structure pointer root as the root node of the whole tree. If the left and right nodes ...

Smart pointer When using heap memory, when a piece of heap memory is no longer needed, this memory must be released in order to reallocate this memory. If a programmer accidentally makes an error when writing code for object reallocation, it will lead to serious problems, such as memory leakage, which will lead to program crash. In C ++ 11 ...

Recently, I have learned some JNDI vulnerability utilization chains that master is looking for, and I have benefited a lot. I also try to do some mining on JNDI vulnerability utilization. At present, I think of two questions in the process of JNDI utilization. It is inconvenient to test that every JNDI Bypass chain needs to change the URL manu ...

applicationContext basic configuration IOC configuration 1. Basic configuration <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/ ...

If you are Xiaobai, this set of information can help you become a big bull. If you have rich development experience, this set of information can help you break through the bottleneck 2022web full set of video tutorial front-end architecture H5 vue node applet Video + data + code + interview questions. On January 12, it was originally the tim ...

Judge how many primes there are between 101-200 and output all primes. x = 0 for m in range(101, 201): for n in range(2, int(m ** 0.5) + 1): if m % n == 0: break elif n == int(m ** 0.5): print('Prime number:',m) x+=1 print(x) Find the cumulative value of integers 1 ~ 100, but it is requ ...

This paper introduces how to use alicloud File Storage NAS to replace K8S native NFS system, so as to realize the flexible expansion, high availability and high-performance deployment of the storage system out of the cluster Built structure A master node and multiple slave nodes that asynchronously copy data from the master are composed, that ...