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I've set everything up that I need on my Mac (Ruby, Rails, Homebrew, Git, etc), and I've even written a small program. Now, how do I execute it in Terminal? I wrote the program in Redcar and saved it as a .rb, but I don't know how to execute it through Terminal. I want to run the program and see if it actually works. How do I do this?
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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.
You can make the script executable with the following command: chmod +x hello. rb . chmod is a shell command that allows us to change the permissions for a file. The +x specifies that the script should be executable.
Just call: ruby your_program.rb
or
#!/usr/bin/env ruby,chmod +x your_program.rb ./your_program.rb some_param
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