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Brotherly Block Chain Introduction Course eth Source Code Analysis p2p-udp.go Source Code Analysis (I) The network discovery protocol of p2p uses Kademlia protocol to deal with network node discovery. Node lookup and update. Kademlia protocol uses UDP protocol for network communication. Reading the code in this section suggests looking at the ...

Written in front For a crawler enthusiast, there is more or less a little bit of collecting addiction - finding good pictures, finding good books, finding all kinds of things that can be stored on the computer, all like to crawl it down in batches. And then, yeah, that's it. Then slowly forget it. Crawler analysis Open th ...

Common Git commands Git configuration git config --global user.name "storm" git config --global user.email "stormzhang.dev@gmail.com" git config --global color.ui true git config --global alias.co checkout # alias git config --global alias.ci commit git config --global alias.st status git config --global alias.br branch git config --global cor ...

In this period of requirement, it is required to obtain a unique code from the system device as the unique identification of the current logged-in user, and finally decided to adopt the mac address. The first is: The official method of obtaining mac address is: /** * Getting mac address through WiFiManager * @param ...

Today we practice crawling a website and summarize the crawling template of similar websites. Let's take a website like http://www.simm.cas.cn/xwzx/kydt/ as an example. The goal is to crawl the title, release time, article links, picture links, and source of the news. We mainly use requests, re, Beautiful Soup, JSON modules. Go ...

The frost wind is getting tighter and colder. Listen to the voice of lone geese and send out a sound of sadness. This poem in "Royal Street Journey" is just the right one to describe Beijing in this season. It's time to test perseverance when the frost blows and running becomes more and more reluctant to take off your ...

The last blog talked about sending data to android development board with a serial assistant. Now let's build a platform by ourselves. Let's start with the pit I stepped on before, because I used SerialPort.c to successfully open the serial port on android, so I think it's similar on mac. Then I used java to call. so directly on eclipse in th ...

Tools needed: NERDTree Cscope ctags vundle homebrew(for mac) Catalog: Introduction to Software NERDTree Cscope ctags vundle homebrew mac installation ubuntu installation Introduction to Software NERDTree NERDTree is a vim plug-in that displays tree directories: Enter the tree interface of ...

Get other sister chapters of a Document object from a URL:Simulated Browser: Getting Web Page Data Simply (1)Simulated Browser: post Simulated Log-in to Get Web Page Data (2)Simulated Browser: Use of Jsoup Tool Class and retry Strategy for Failed Retries (3) Tool class: As the name implies, it is a tool for others to use as a tool. It only pro ...

Construction of LVS DR Model Dead work Three machines Distributor, also known as dispatcher (abbreviated as dir) The gateway of the previous rs machine needs to be changed back 85.132 rs1 85.129 rs2 85.128 vip 85.200 DR Model Building Write the script vim/usr/local/sbin/lvs_dr.sh on dir The contents ...