Liuyue | 刘悦

Original link: https://v3u.cn/a_id_262 Blockchain decentralization ideas are ubiquitous. For example, the recent use of individual antigen self-testing to replace large-scale centralized nucleic acid testing is the implementation of the idea of ​​decentralization, which avoids cross-infection caused by large-scale gatherings and improves detection efficiency. , this time we use the latest ethers V5.0 or above version …

The new version of the Ethereum library ethersV5.0 cooperates with the backend Golang1.18 to link the blockchain wallet (Metamask/Okc) and verify the signature in real time Read More »

Original link: https://v3u.cn/a_id_257 Ruby is a strongly typed static language, that is, once an object is defined in Ruby, it will always be the data type if it does not pass a coercion operation, and the object data type will only be detected when the Ruby interpreter is running. Everything is an object (including nil-valued …

Ruby 3 basic data types (data types) EP02 Read More »

Original link: https://v3u.cn/a_id_256 Continuing from the last book, in the previous article, we have built a development environment for Ruby3 on all platforms. Now, we can get in touch with Ruby3 for the first time. Ruby is an interpreted programming language that is versatile at the object-oriented level. We can think of writing Ruby code …

Red sleeves add fragrance, peerless enchanting, Ruby 3 basic grammar of Ruby language basic introductory tutorial, first intimate contact with EP01 Read More »

Original link: https://v3u.cn/a_id_255 If video games are the ninth art, then programming is worthy of the tenth art. The general law of art development is to give people a higher level of feeling for works of art, and Matz’s Ruby language is such a work of art. Whether it’s syntax or ideas, Ruby developers feel …

Time is old, Ruby is not dead, Ruby language basic introductory tutorial – Ruby3 full platform development environment construction Read More »

Original link: https://v3u.cn/a_id_254 There is a saying in the handed down classic “Cai Gen Tan”: “Wandering among the mountains, forests, springs and stones, the dusty heart gradually fades; the barbarians are like poetry, books and pictures, and the vulgarity disappears. Therefore, although the gentleman does not play with things and lose his mind, he often …

Gentlemen do not play with things, but often use things to adjust their hearts. The website integrates a two-dimensional webpage widget (widget) lycoris simulator to chat and enjoy. Read More »

Original link: https://v3u.cn/a_id_253 Gorgeous and cool animation special effects can always make people feel relaxed and happy, and can’t help themselves. In addition to envy, if you can also explore the realization logic under its gorgeous appearance, it will be a success and a step forward. This time we use images, SCSS styles, and SVG …

One red heart, three-handed preparation, based on image (img)/SCSS (style)/SVG animation to achieve dynamic like button special effects Read More »

Original link: https://v3u.cn/a_id_252 R&D is less free, and people are busy in September. It’s the annual “Golden Nine Silver Ten” autumn recruitment season, and it’s time to write resumes. If you are still looking for templates in traditional Word documents, and then work silently, you are obviously a bit behind the times. This time we …

Skillful as Fan Jin, precise than Zhuoyu, create a beautiful and detailed Go language technical resume efficiently in one minute (Golang1.18) Read More »

Original link: https://v3u.cn/a_id_251 Continuing the previous article, last time we completed the user’s login logic, verifying the account and password of the user account added in the previous user management module, and using the graphic verification code to force human-computer interaction in the process to prevent the account password from being used. Brute-force cracking. This …

Rainbow Goddess Leaps in the Sky, Go Language Advanced Go Language High-performance Web Framework Iris Project Combat – JWT and Middleware (Middleware) Use EP07 Read More »

Original link: https://v3u.cn/a_id_250 The book is connected to the previous chapter. In the last chapter, we optimized the overall structure of the project according to the organizational structure of “low coupling and high cohesion”. In this chapter, we will continue to write the business, that is, the user’s login logic, and the previous user management …

Rainbow goddess leaps into the sky, Go language advanced Go language high-performance web framework Iris project combat – login and graphic verification code (captcha) EP06 Read More »

Original link: https://v3u.cn/a_id_248 Blockchain technology is not an advanced concept. It is not more difficult to understand than quantum mechanics, Pauli exclusion principle, and Goldbach’s conjecture. . The blockchain is actually a set of methodology for coordinating organizational records, or more accurately, a “decentralized” organizational structure system. Decentralization As we all know, any company, organization, …

Blockchain, go to the center, why have you ever set your sights on the king? Implement blockchain technology in Go language, and understand blockchain in seconds through Golang Read More »

Original link: https://v3u.cn/a_id_248 Blockchain technology is not an advanced concept. It is not more difficult to understand than quantum mechanics, Pauli exclusion principle, and Goldbach’s conjecture. . The blockchain is actually a set of methodology for coordinating organizational records, or more accurately, a “decentralized” organizational structure system. Decentralization As we all know, any company, organization, …

Blockchain, go to the center, why have you ever set your sights on the king? Implement blockchain technology in Go language, and understand blockchain in seconds through Golang Read More »

Original link: https://v3u.cn/a_id_248 Blockchain technology is not an advanced concept. It is not more difficult to understand than quantum mechanics, Pauli exclusion principle, and Goldbach’s conjecture. . The blockchain is actually a set of methodology for coordinating organizational records, or more accurately, a “decentralized” organizational structure system. Decentralization As we all know, any company, organization, …

Blockchain, go to the center, why have you ever set your sights on the king? Implement blockchain technology in Go language, and understand blockchain in seconds through Golang Read More »

Original link: https://v3u.cn/a_id_247 Define first, execute later. I have to admire the genius design of Golang designers. In fact, the defer keyword is equivalent to the finally syntax block in the try{…}except{…}finally{…} structural design in Python, the code logic that is enforced at the end of the function , but defer is more elegant in …

Delayed execution, infinite magic, Go lang1.18 introductory refining tutorial, from Bai Ding to Hongru, the defer keyword delay invocation mechanism in Golang uses EP17 Read More »