Question

I would like to execute an OS command from my ruby script but I want to add an argument from a ruby variable.

I know that’s possible by using keyword system like that :

#!/usr/bin/env ruby directory = '/home/paulgreg/' system 'ls ' + directory 

but is that possible by using the ‘backquotes or backticks syntax’ ? (I mean by using that syntax : ls)

Answer 1

No, that will just concatenate the output from ls and the contents of directory.

But you can do this:

#!/usr/bin/env ruby directory = '/home/paulgreg/' `ls #{directory}`