Open up IRB (which stands for Interactive Ruby). If you’re using macOS open up Terminal and type irb, then hit enter. If you’re using Linux, open up a shell and type irb and hit enter. If you’re using Windows, open Interactive Ruby from the Ruby section of your Start Menu. irb (main):001:0> Ok, so it’s open. Now what? … See more This is a small Ruby tutorial that should take no more than 20 minutesto complete. It makes the assumption that you already have Ruby installed.(If you do not have Ruby on your … See more Already, we have enough to use IRB as a basic calculator: Three plus two. Easy enough. What about three times two? You couldtype it in, it’s short enough, but you may also be able to … See more Ruby comes with a program that will show the results of any Rubystatements you feed it. Playing with Ruby code in interactive … See more What just happened? Did we just write the world’s shortest “Hello World”program? Not exactly. The second line is just IRB’s way of telling usthe result of the last expression it evaluated. If we want to print out“Hello World” we … See more WebRuby version is 'ruby 3.1.0p0 (2024-12-25 revision fb4df44d16) [x86_64-linux]'. Rather than just showing the average response-time for a request it is more interesting to see how the response-time develops over time. The graphs below show the …
How to read lines of a file in Ruby - Stack Overflow
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