Programmer Think

preface What is binlog There are various types of logs in mysql, which record mysql, including startup, operation, connection, change and other operations, and binlog is the most important log. It records the changes of all MySQL data and stores it on disk in binary form binlg records all table structure changes (CREATE, ALTER TABLE... ...

Official Chinese documents Zabbix user manual catalogue Solve the problem of no network after centos7 installationInstall MySQLInstalling zabbixp3 common monitoring commandsCustom monitorCustom triggerMail alarmModify email contentVx alarmSecondary development Customize menu Modify footer Replace logoMonitor network trafficMonitoring diskMo ...

preface I believe that this article is not the first time for my classmates to see articles about HashMap. Most of the online HashMap articles are not suitable for me, so I decided to understand the source code from scratch. I will use the relatively simple logic to convince myself to understand the source code. If you are interested, please l ...

Coding format: Common character encoding formats The memory interpreter is Python . py files are stored on disk using UTF-8 (external storage) Reading and writing principle of documents: 1. File reading and writing is commonly known as "IO operation". I refers to input and O refers to output. Therefore, IO operation is input and ...

Title Description: Source: LeetCode Link: https://leetcode-cn.com/problems/er-cha-sou-suo-shu-de-di-kda-jie-dian-lcof Given a binary search tree, please find the value of the k-largest node. Example: Example 1: input: root = [3,1,4,null,2], k = 1 3 / \ 1 4 \ 2 output: 4 Example 2: input: root = [5,3,6,2,4,null, ...

At present, it is found that the online CFS three-tier intranet shooting range is basically built by using VM virtual machine. I want to try whether I can use docker to combine the existing vulnerability environments and build them directly through docker compose. The docker environments used are from vulnhub First, try to build containers tha ...

MacOS java development 2 variables and constants constant Constants: data that cannot be changed Data, keywords and identifiers are all components of JAVA programs Constant category: Integer 100, 23, 1 Decimals 3.14, 21.231 Character - enclosed in single quotation marks, can only write one character and must have a value String - enclos ...

C language learning has come to an end. This paper is a summary of the recent learning of C language. Most of the questions come from niuke.com. Topic 1: integer conversion Title Description: write A function to determine how many bits need to be changed to convert integer A to integer B. Idea: in fact, this problem is actually to find how m ...

Integer type (byte, short, int, long) Floating point type (float, double) Character char boolean 1. Integer type Integer type is used to store integer (no decimal part) values, which can be positive or negative. Integer data can be divided into byte, short, int and long according to its memory size. Different data types have diff ...

1. API introduction Use the device command API provided by onenet platform to directly issue instructions to the device. When the device receives the instructions and responds, the API returns the response content of the device Request API: POST http://api.heclouds.com/v1/synccmds?device_id=866760442&timeout=30 The request body carries ...