Programmer Think

In the process of implementing the interpreter, I found a fun thing, that is, how to better use the object-oriented idea to write code, and think about how to define a set of templates. Before starting again, I sorted out two kinds of object-oriented templates.One is a java style template(class classname (superclass) (. field) ( func t()( ...

Blue Bridge Cup: running exercise algorithm (java) This article is only for reference, because the blogger is very delicious, so the method is very stupid. I hope the bosses can put forward valuable opinions!!! thank you!!! Original title This question is a blank filling question. You only need to calculate the result and use the output stat ...

Initial review Process control if -else package Initial_practice; import java.util.Scanner; /* Suppose you want to develop a lottery game. The program randomly generates a two digit lottery, prompts the user to enter a two digit lottery, and then determines whether the user can win according to the following rules. 1)If the number ent ...

[Title 81] Title: a company uses a public telephone to transmit data. The data is a four digit integer and is encrypted in the transmission process. The encryption rules are as follows: add 5 to each number, then replace the number with the remainder of sum divided by 10, and then exchange the first and fourth bits, and the second and third bi ...

summary Producer consumer model: a typical design pattern, which is a solution designed by people according to typical scenes Application scenario: it is applied to the scenario where a large amount of data is generated and processed Specific implementation: there are multiple producer and consumer threads to produce and process a huge amoun ...

What is a reptile Crawler is to grab the information in the web page according to certain rules. The crawler process is roughly divided into the following steps: Send request to target pageGet the response content of the requestParse the returned response content according to certain rules to obtain the desired informationSave the obtained in ...

Problem surface There is a game in which a lattice of m rows and n columns is given on the plane. There are obstacles on some grids, and there may be English letters on grids without obstacles. Now it is required to establish a path on the empty grid, so that there is a letter at both ends of each path, and the letters at both ends are differe ...

1. Basic introduction Huffman tree, alias "Huffman tree", "Huffman tree", "optimal tree" and "optimal binary tree" Given n weights as n leaf nodes, a binary tree is constructed. If the weighted path length (wpl) of the tree reaches the minimum, such a binary tree is called the optimal binary tree, also ...

introduction This article introduces three special permissions of Linux file system: suid, sgid and sticky. Article catalogue 0 × 1. How to view the default permissions of files created by the current user0 × 2. How to add suid permission to a file0 × 3. How to add sgid permission to a folder0 × 4. How to add sticky p ...

an introduction to Generally speaking, there are two modes of Docker data persistence: 1, volume based on local file system Docker automatic creationBind the mounted volume and create it yourself 2, plugin based volume 1 based on local file system 1.1 Docker automatic creation 1.1.1 create a MySQL image, and then run the container s ...