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Ruby Programming
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Ruby Programs

Finally, you can run a Ruby program from a file as you would any other shell script, Perl program, or Python program. You can simply run Ruby giving the script name as an argument:

% ruby myprog.rb

Or you can use the Unix ``shebang'' notation as the first line of the program file.[If your system supports it, you can avoid hard-coding the path to Ruby in the shebang line by using #!/usr/bin/env ruby, which will search your path for ruby and then execute it.]

#!/usr/local/bin/ruby -w

puts "Hello, World!"

If you make this source file executable (using, for instance, chmod +x myprog.rb), Unix lets you run the file as a program:

% ./myprog.rb
Hello, World!

You can do something similar under Microsoft Windows using file associations.
Ruby Programming
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