How can I directly call a ruby function from the command-line?
Imagine, I would have this script test.rb:
class TestClass def self.test_function(some_var) puts "I got the following variable: #{some_var}" end end
If this script is run from the command-line (ruby test.rb
), nothing happens (as intended).
Is there something like ruby test.rb TestClass.test_function('someTextString')
? I want to get the following output: I got the following variable: someTextString
.
With this, you can just type $ ruby test. rb and it will do what you want. Or you can chmod +x test. rb; ./test.
It's easy -- just create a file with the extension . rb , navigate to that file's directory from the command line, and run it using $ ruby filename. rb (the dollar sign is just the command prompt). You'll be able to gets from and puts to the command line now!
Open a script in the editor and press ⌃⇧R / Ctrl+Shift+F10. Right-click a script in the editor or Project view and select Run 'script' from the context menu. Press Ctrl twice to invoke the Run Anything popup and execute the ruby script. rb command.
First the name of the class needs to start with a capital letter, and since you really want to use a static method, the function name definition needs to start with self.
.
class TestClass def self.test_function(someVar) puts "I got the following variable: " + someVar end end
Then to invoke that from the command line you can do:
ruby -r "./test.rb" -e "TestClass.test_function 'hi'"
If you instead had test_function
as an instance method, you'd have:
class TestClass def test_function(someVar) puts "I got the following variable: " + someVar end end
then you'd invoke it with:
ruby -r "./test.rb" -e "TestClass.new.test_function 'hi'"
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