Programmer Think

Chapter 18 This paper introduces the while loop statement in Python. This article discusses the else branch option of the while statement. while else statement The while statement in Python supports an optional else branch. The syntax is as follows: while condition: # code block to run else: # else clause code block In the above sy ...

Frame review 1, Maven 1. Concept Project architecture management toolAgreed approximate configuration 2. Environment configuration Configure environment variables download apache-maven-3.6.3-bin.tar.gzConfigure environment variable M2_HOME,MAVEN_HOME, add the path variableCheck whether the configuration is successful Alibaba cloud im ...

1. Preface Cyclic dependence : is N class circular (nested) references. Generally speaking, N beans refer to each other and finally form A closed loop. It can be represented by A classic diagram as follows (A, B and C all represent objects, and the dotted line represents reference relations): ​ In fact, it can be N=1, that is, the cyclic ...

Hematemesis sorting programmer must read list: https://github.com/silently9527/ProgrammerBooks WeChat official account: beta Java In the first part, we learned depth first search and knew how to find the path in the graph through depth first search; In this article, we continue to learn other application scenarios of depth first search alg ...

Download scripts for creating tables and inserting data Here, for your convenience, the data script has been prepared for you. Click the link below to download directly Create data table script: http://tianchi-media.oss-cn-beijing.aliyuncs.com/dragonball/SQL/create_table.sql Insert data script: http://tianchi-media.oss-cn-beijing.aliyuncs.com/ ...

1, Introduction to spring MVC 1. What is MVC MVC is an idea of software architecture, which divides software according to model, view and controller M: Model, the model layer, refers to the JavaBean in the project, which is used to process data JavaBean s fall into two categories: One is called entity Bean: it is used to store business dat ...

Haproxy cooperates with Nginx to build a web Cluster 1, Common Web Cluster scheduler At present, the common Web Cluster scheduler is divided into software and hardware The software usually uses open source LVS, Haproxy and Nginx ·LVS has the best performance, but the construction is relatively complex; ·The upstream module of Ng ...

docker manages data in containers in two main ways: -Data Volumes -Mount Host Directory (Bind mounts) Data Volume in order to well realize data saving and data sharing, Docker puts forward the concept of Volume, which simply bypasses the default federated file system and exists on the host in the form of normal files or directories. Also kno ...

JS implementation of various sorting There are many kinds of sorting in data structure algorithms, common and uncommon, including at least ten kinds. According to their characteristics, they can be roughly divided into two types: comparison sort and non comparison sort. Comparison sort: the relative order between elements is determined by com ...

String brush notes 541.Reverse string II code implementation class Solution { public String reverseStr(String s, int k) { char[] a = s.toCharArray(); int i = 0; int j = 0; char tmp; for (int start = 0; start < a.length; start += 2 * k) { i = start; // Ensure the requirements of ...