/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" Homebrew 是用 Ruby 开发的,因此它会修改你计算机的 Ruby 路径。curl命令从指定的 URL 中提取脚本。该脚本解释了它将要做什么,然后会暂停下来提示你确认。这给了你大量反馈,关于该脚本对你的系统将要做...
For measuring elapsed time, a simple solution is to measure the start time and the end time of a particular code block, and report the difference. If we need a higher granularity, we do this for every single method. To do this, we use the TracePoint API in Ruby to hook into every s...
Another reason many people run into issues with Ruby on Apple Silicon Macs is because they’re trying to use the version of Ruby that came preinstalled on macOS, known as the system Ruby. If you runwhich rubyin your terminal, and if it says/usr/bin/ruby, that’s the system Rub...
Sometimes you’ll want to write code that spans multiple lines. IRB supports this intuitively. IRB only executes code that is syntactically complete. The following Ruby code uses anarrayof sharks and uses theselectmethod to return only the sharks containing the letter “a” in their name. Type ...
then pass to programmer to perform more lower-level system or application modeling and eventually generate source code from implementation model. This chain makes building software faster and cheaper. In this chapter, we will go through the instant generation of Ruby. To generate code by instant ge...
Ruby in the JVM also means that Ruby can run anywhere Java can run (like Android phones, using Ruboto for example). Additionally, thanks to the interoperability of the JVM, JRuby code can make use of the Java platform, including both standard and 3rd party libraries. JRuby is also useful ...
The Ruby version dependency lives in one place—your app—so upgrades and rollbacks are atomic, even when you switch versions.One thing well. rbenv is concerned solely with switching Ruby versions. It's simple and predictable. A rich plugin ecosystem lets you tailor it to suit your needs. ...
Let’s break down the different components of the code. putsis a Rubymethodthat tells the computer to print some text to the screen. Theputsmethod is then followed by a sequence of characters —Hello, World!, enclosed in quotation marks. Any characters that are inside of quotation marks are...
I wanted to start an Internet company, or join one, so building meant coding. I’ve always liked computers and on several occasions I had learned how to code a little bit and enjoyed it, but for different circumstances I never went deeper than a superficial introduction. Now, it was ...
Developing a Ruby gem is different from developing Rails applications, with the biggest difference: there is no Rails. This means:no defined structure (neither for code nor directories) no autoloading of classes, i.e. you need to require all files yourself no active_support niceties...