Programmer Help

Lesson 33 of happy senior 4 introduced how to use CChart to draw curves in the console program. In fact, the method is very simple, that is, create a pop-up window and draw on this pop-up window. In fact, the technical content is relatively low. In this lesson, Benben wants to introduce you how to draw directly on the console window. What, is ...

brief introduction When watching the live broadcast of mobile games, what we see in the audience is the content on the player's screen. How is this realized? This blog will write a live video Demo to achieve the effect similar to the live video of mobile games It's easy to obtain screen data. Android system provides corresponding services. Th ...

In my last blog, I shared the related contents of the sequence table. In this blog, I want to introduce the related contents of the single chain table. Code link of this blog: https://gitee.com/byte-binxin/data-structure/tree/master/SList_ two Concept of linked list Concept: linked list is a non continuous and non sequential storage s ...

1. Solve DOS attack production cases: Monitor the number of concurrent connections of an IP or PV reaches 100 in a short time according to the number of web logs or network connections, that is, call the firewall command to block the corresponding IP, and monitor the frequency every 5 minutes. 1. Scripting [root@Centos8 ~]# cat deny.dos.sh # ...

1, Cache principle The first layer optimization scheme to be considered in the high concurrency scenario is to increase the cache. In particular, Redis can copy a copy of the original data in the database into memory, which can reduce the reading operation of the database, reduce the pressure on the database, and speed up the response speed of ...

In machine learning, random forest is a classifier containing multiple decision trees. It is a set algorithm, and its output category is determined by the mode of the category output by individual trees. Random forest = Bagging + decision tree Bagging integration principle bagging integration process 1. Sampling: take a part of all samples 2 ...

Create table structure according to ER diagram /* Navicat Oracle Data Transfer Oracle Client Version : 10.2.0.5.0 Source Server : MyOracle Source Server Version : 110200 Source Host : localhost:1521 Source Schema : KAIFAMIAO Target Server Type : ORACLE Target Server Version : 110200 File Encoding : 65001 ...

Array Stitching When stitching vertically: each column represents the same meaning, otherwise the head is not in the mouth. If each column has a different meaning, then the columns of the number of one group should be swapped so that they are the same as the other. Array row-column exchange Exercise: What should I do now if I want to st ...

36. What optimizations have you made for the Vue project? 1)v-if and v-show Distinguish usage scenarios 2)computed and watch Distinguish usage scenarios 3)Lazy loading(fifth) 4)Browser cache(Question 28 above) 37. What are the ways to optimize the front-end performance of web pages? 1)compress css, js, picture 2)reduce dom Number of element ...

1. Classification of flow: 1) Classification by direction: input stream, output stream 2) Classification by operation unit: byte stream   Character stream 3) Combination: byte input stream byte output stream character input stream   Character input stream 2. Byte input stream: 1. Abstract parent: InputStream ------ cannot be ...