Programmer Think

preface Today, in the process of interviewing others, I asked about the design mode. He said command mode, what!! I haven't heard of it. I can only pretend to be calm, ask him, and quickly turn over the book when I come back. Command mode Daily endorsement: Command Pattern is a data-driven design pattern, which belongs to behavioral ...

1. Environmental preparation1 Alibaba cloud servercentos7.9docker latest version2. Installation steps of dockerSet up warehouseInstall the required packages. Yum utils provides Yum config manager, and the device mapper storage driver requires device mapper persistent data and lvm2.sudo yum install -y yum-utils device-mapper-persistent-data lvm2 ...

1.if statement In go language, there is a special if statement usage. if statement，condition{ } example: package main import "fmt" func main() { //Here num is a local variable if num := 4; num > 0 { fmt.Printf("number=%d\n", num) } //Global variable here num1 := 2 fmt.Println(num1) } result: number=4 2 2. R ...

1, Implementation of front-end page and bottom data of household head management Link: https://pan.baidu.com/s/1euQPqoZ21h80WjK0TPTogA   Extraction code: 0wb2 This is the static page of the modified part, which can be downloaded and used directly The json file modifies this paragraph to make the link take effect Start backend c ...

When I think my code is safe, wait... catalogue Basic concepts of multithreading Basic concepts: program, process and thread Understanding of single core CPU and multi-core CPU ​  Parallelism and concurrency Advantages of using multithreading ​  When do I need multithreading ​  Creation and use of threads ​ Method 1 of cr ...

Sometimes we have such a demand: We define a Python method. The method receives some parameters, but we want to expose these parameters on the command line when calling. For example, here is a crawling method: import requests def scrape(url, timeout=10): response = requests.get(url, timeout=timeout) print(response.text) Here, a s ...

Previous review Custom precon h,kernel_list.h. sysbrowse has three header files, which complete the pre configuration of the core header file, the operation of the core header file and the functions of the information browsing system. 1, This goal Build the relevant operations of file data stream reading and writing, so as to save the ...

preface ws.schild is a java toolkit based on ffmpeg. It is the mainstream java toolkit for transcoding, clipping and extracting video and audio. 1, Introduction to main tools 1. VideoAttributes VideoAttributes is WS The important tool class for setting video attributes in Schild toolkit is WS Schild is the most important class for v ...

Python wechat ordering applet course video https://edu.csdn.net/course/detail/36074 Python actual combat quantitative transaction financial management system https://edu.csdn.net/course/detail/35475 Catalogue* 1. Demand 2. Steps3. Code implementation (1) Receive user input target file name(2) Planning backup file name(3) Backup file writ ...

In C language, there are several special custom types: structure, enumeration and union In this blog, let's take a look at these custom types! 😶 1. Structure A structure is a collection of values. Each member of a structure can be a variable of different types 1.1 declaration of structure Taking personal information as an example, there a ...