Question

I’m writing a method to wrap another method as part of a class. It needs to both take and pass on an arbitrary number of arguments.

Something like…

def do(*things)
  old_method(things)
end

except this won’t work because old_method needs to be passed the contents of the things array as separate arguments rather than as an array.

I just can’t think of a way to do this within ruby syntax…

Answer 1

You can use:

def do(*things)
  old_method(*things)
end

That’s a splat operator, see e.g. What does the (unary) * operator do in this Ruby code? or What's the splat doing here?