Run a Ruby library from the command-line

Question

I\'ve just learned the basics of Ruby after being very happy with Python for several years (I\'m still using Python for some things), but I\'d like to know if there\'s an id

Answer 1

While

if __FILE__ == $0
  Foo.run
end

is the common approach, I'm currently using

if File.identical?(__FILE__, $0)
  Foo.run
end

because programs like ruby-prof can make $0 not equal __FILE__ even when you use --replace-progname.

Answer 2

You can find a similar functionality in ruby.

__FILE__ the current source file name.

$0 Contains the name of the script being executed. May be assignable.

source: Ruby Quick Ref

Answer 3

You want to use:

if __FILE__ == $0
  # do stuff
end

__FILE__ is the source file name and $0 is the name of the script currently being executed.