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- How can I have more than two command line flags control the same behavior?
- In Go, I know how to use the github.com/pborman/getopt package to perform getopt-like command line parsing. However, this package seems to only support one string version and one rune version of each command line option. Sometimes I want more than just two ways to specify options. For example, for a hypothetical program called prog, I would like the following code to all perform the exact same function: prog-r[otherargs]prog-r[otherargs]prog--recurse[otherargs]prog--recursive[otherargs]
- Golang . ruby 1271 2024-02-06 10:06:03
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- Error aesGCMOpen got password: Message authentication failed: golang decryption gcm
- I'm trying to rewrite railsactivesupport decryption to golang but getting this error erraesGCOpen got password: Message validation failed This is the rails code for active support decryption classCryptonSECRET_KEY_BASE=ENV["SECRET_KEY_BASE"]class
- Golang . ruby 1042 2024-02-06 08:05:03
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- Detailed explanation of Linux program compilation process
- Computer programming languages are usually divided into three categories: machine language, assembly language and high-level language. High-level languages need to be translated into machine language before they can be executed. There are two ways of translation, one is compiled and the other is interpreted. Therefore, we basically divide high-level languages into two categories, one is compiled language, such as C, C++, Java, and the other is interpreted language, such as Python, Ruby, MATLAB, and JavaScript. This article will introduce the process of converting high-level programs written in C/C++ language into binary codes that can be executed by the processor, including four steps: Preprocessing (Preprocessing) Compilation (Compilation) Assembly (Assem)
- LINUX . ruby 637 2024-02-05 13:09:15
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- (Fixed) apt-get command not found on Mac – full tutorial
- If you have ever used a Linux system, you may be familiar with the Apt-get command. It is a command used to install applications or software packages on Linux systems. Although macOS and Linux have some similarities, only a very small number of Linux packages can be installed on macOS. Especially older versions of macOS are more likely to be unable to run Linux applications. Can't find apt-get command? When users try to install Linux applications on macOS, they may receive an "Apt-get command not found" message. Actually, there is nothing wrong with the Apt-get command itself, but it doesn't work on macOS. This is because macOS doesn't have a built-in
- iPhone . ruby 1657 2024-02-05 11:51:21
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- Linux Penetration Testing Tutorial: Teach you step-by-step on stack overflow from getting started to giving up
- For the content of the notes, refer to the KaliLinux penetration testing tutorial by Mr. Fanghong from the Security Niu Classroom. The crux of all vulnerabilities comes from data input. The principle of buffer overflow is that the boundary between data and code is blurred. When the buffer boundary limit is not strict, because the variable transfer Entering malformed data or running the program incorrectly causes the buffer to be "exploded", thereby overwriting the data in the adjacent video memory area. Successfully changing the video memory data can lead to process kidnapping, execution of malicious code, and acquisition of server control. To better understand the principle of buffer overflow, refer to the article reprinted by the author: Teach you step by step about stack overflow from getting started to abandoning it (Part 1) Teach you step by step about stack overflow from getting started to abandoning it (Part 2) Article Table of Contents 1. Ways to discover vulnerabilities (1) Source code audit software developers, or with the help of
- LINUX . ruby 527 2024-02-02 09:36:02
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- Configure PHP environment and change PHP version on Mac OS (using PHPStorm)
- This article will introduce you to how to change the PHP version on Mac. If you encounter related problems, I hope this article can help you. Please read on. Detailed tutorial on installing, using and uninstalling brew on Apple Mac computers 1. First, click on the [Launchpad] icon on the left as pointed by the arrow in the picture below. 2. Then, find the [Other] folder in the pop-up menu bar and click it, as shown by the arrow in the figure below. 3. Finally, after opening the folder, click the [Terminal] icon at the location shown in the picture below. Open Finder and select the application. Find Utilities in Applications and click Terminal. 3. Copy the content to the clipboard ruby-e$ (curl-fsSL https://raw.git
- MAC . ruby 939 2024-01-27 08:21:09
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- Characteristics and advantages of Linux systems
- 1. The Linux operating system is an open source operating system based on UNIX and is highly customizable and flexible. Compared with other operating systems such as Windows, Linux has the following differences: - Open source code: Linux is a free open source project linux server system, and users can freely view, modify and publish its source code. -Multi-user multi-tasking support: Linux can run multiple users and processes at the same time, and provides effective resource management and scheduling mechanisms. -Network support: Powerful external network functions have been built in from the beginning and are widely used in the server field. -Command line interface: Linux provides a wealth of command line tools, allowing users to operate through the command line.
- LINUX . ruby 1241 2024-01-26 20:24:15
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- You will know the difference between Linux and Windows servers after reading this
- Cloud server: The difference and choice between Linux and Windows Author: JC2023.10.0916:00 Views: 185 Introduction: The difference between linux server and Windows server The difference between linux server and Windows server With the continuous development of technology, servers are used as a part of the network environment The choice of operating system is crucial for enterprises or individuals. Among many operating systems, Linux and Windows are the two most common types, and they have obvious differences in many aspects. This article will compare Linux servers and Windows servers from multiple perspectives to provide readers with a comprehensive understanding. PrefaceLinux and Wi
- LINUX . ruby 1747 2024-01-26 15:36:28
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- Explore why the Go language is so popular in China
- Explore why the Go language is so popular in China. With the rapid development of the Internet and mobile Internet, the choice of programming language has become increasingly important. In China, the Go language has received widespread attention and popularity in recent years. So, what exactly makes the Go language so popular in China? This article will explore the following aspects. First of all, the simplicity and ease of use of the Go language are one of the main reasons for its popularity. Compared with other programming languages, the syntax of Go language is very concise and clear, and the learning curve is relatively low. At the same time, Go language
- Golang . ruby 451 2024-01-20 09:36:06
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- The Ultimate Guide to Uncovering the Programming Languages Supported by Canvas
- Canvas is a new element in HTML5, which provides developers with a powerful platform for drawing graphics, creating animations, and achieving other visual effects. As an important part of Web front-end technology, Canvas is widely used in many fields such as game development, data visualization and other interactive projects. In the world of Canvas, programming languages are indispensable tools, and in this article, we will reveal the programming languages supported by Canvas. JavaScript is currently the most common
- HTML Tutorial . ruby 781 2024-01-17 10:04:07
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- Detailed explanation of the steps to install Python library through Tsinghua mirror
- Tsinghua Mirror Tutorial: How to install Python libraries through Tsinghua Mirror, specific code examples are required. Introduction: In Python development, it is often necessary to use third-party libraries to extend its functions. However, due to limitations of the network environment, sometimes we cannot install the required libraries directly from official sources. At this time, Tsinghua Mirror becomes a good choice. This article will introduce how to use the Tsinghua mirror to install the Python library and demonstrate it through specific code examples. 1. What is Tsinghua Mirror? Tsinghua Mirror is a set developed by Tsinghua University
- Python Tutorial . ruby 2038 2024-01-16 08:48:15
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- What in-memory databases similar to Redis are available under Windows?
- Which in-memory databases are used under Windows? In-memory databases similar to redis can be divided into relational in-memory databases and key-value in-memory databases. In actual applications, in-memory databases are mainly used with large relational databases such as Oracle or MySQL, focusing on performance. It functions like a cache and does not pay attention to data integrity and data consistency. Key-value-based in-memory databases are easier to use than relational ones, with better performance and scalability, so they are used more in applications than relational in-memory databases. Compare the functional features of mainstream in-memory databases FastDB, Memcached and Redis. The characteristics of FastDB include the following aspects: 1. FastDB does not support client-se
- Windows Series . ruby 1181 2024-01-16 08:45:25
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- Comparing server I/O performance of Node, PHP, Java, and Go
- Introduction Understanding an application's input/output (I/O) model means the difference between its planned processing load and brutal real-world usage scenarios. If the application is relatively small and does not serve a high load, it may have little impact. But as the load on your application gradually increases, adopting the wrong I/O model may leave you with many pitfalls and scars. As with most scenarios where there are multiple paths to a solution, the focus is not on which path is better, but on understanding how to make the trade-offs. Let's take a tour of the I/O landscape and see what we can steal from it. In this article, we will compare Node, Java, Go, and PHP respectively with Apache, and discuss how these different languages perform their I/O.
- LINUX . ruby 811 2024-01-14 14:36:06
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- Mastering the Essence of Closures: Key Understandings to Make Your Code More Elegant
- The secret of closures revealed: Master these key knowledge to make your code more elegant Introduction: Closure (Closure) is a powerful programming concept that is widely used in many programming languages. Not only JavaScript, but also programming languages such as Python and Ruby support closures. The concept of closure is also often used in some programming tools and frameworks. This article will introduce the concept and usage of closures in detail, and use specific code examples to help readers better understand the mysteries of closures. What is a closure? Before understanding closures,
- JS Tutorial . ruby 399 2024-01-13 14:54:18
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- What are the common web standard languages in web development?
- Explore the world of web standards languages: What are the languages commonly used in web development? In modern society, the Internet has become more and more popular, and web pages have become an important way for people to obtain information, entertainment, and communication. The development of web pages is inseparable from the application and support of various programming languages. In the network of this virtual world, there are many standardized languages that are widely used to provide users with a high-quality web experience. This article will explore the languages commonly used in web development, including HTML, CSS, and JavaScript. First, HTML
- CSS Tutorial . ruby 1153 2024-01-13 10:59:19
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