Programmer Think

First published in WeChat's Public Number Front End Growth, written on December 15, 2019 background This paper records the whole process of thinking during the brushing process for reference.The main content covers: Assumptions for Topic Analysis Write code validation Look up other people's solutions Thinking Summary Catalog 110. Balanced Bi ...

I. overview The red black tree is a balanced binary tree. This kind of tree can carry out efficient middle order traversal. By constraining the color of each node on any simple path from root to leaf, it is ensured that no path is twice as long as other paths, so it is nearly balanced. We use red black tree when it has less rotation to keep bal ...

1. Introduction of Snack3 and JSONPath Snack3 is a JSON framework that supports JSONPath.JSONPath is a powerful feature that can also be used as an Object Query Language (OQL) in the Java framework. <dependency> <groupId>org.noear</groupId> <artifactId>snack3</artifactId> <version>3.1.5.10</version&g ...

data structure1. Save data 2. Process dataArray + operationCensored deletion Stack and queueIt is a linear table with limited operation Stack is the operation of inserting and deleting at one end -- > the other end of the stack is called the stack bottom (stack and stack area are two concepts) (it is a data structure)The queue is first in, ...

  PrefaceThe text and pictures of this article are from the Internet, only for learning and communication, not for any commercial purpose. The copyright belongs to the original author. If you have any questions, please contact us in time for handling.By Yan Yu less textNote to novice: if you can't find a solution to the problem in your st ...

The JOIN can be roughly divided into the following three categories according to its functions: A INNER JOIN B on condition (inner join, or equivalent join): gets the record of the matching relationship between the fields in two tables. A LEFT JOIN B on condition (left join): gets all records in the left table, even if the right table does n ...

python random number Python defines a set of functions for generating or manipulating random numbers. This particular type of function is used in many games, lotteries, or any application that needs to generate random numbers. Operation of random number 1. choice(): this function is used to generate a random number in the container ...

Last article Describes how to extend a new type of support in flag.This article describes how to use flag to implement subcommands. Overall, this is the core of this series. The first two articles are just padding. The first two articles are linked as follows: A quick way to parse flag packages from the Go command line New Extended Type for Go ...

1. Paging the list set 　　　　　//startIndex It means that the start of the small label starts from 0, pageSize Is the number of records per page int toIndex = new Integer(startIndex)+new Integer(pageSize) ; List<ProjectWorkItemAssignmentVO> listPage = voList.subList(new Integer(startIndex),toIndex>voList.size() ? voL ...

Go language has a strong momentum of development, but there are also many disadvantages. Fortunately, there are many fans who provide numerous libraries, which show their advantages too well. They can use whatever they do, basically ignore the pointer, and the performance is good. Recently, there is a problem in using Chinese under windows. Th ...