Question

Suppose I have the global method hello(name) and an instance method hello like this:

def hello(name)
  puts("Hello " + name)
end

class String
  def hello
    hello(self)         # does not work, see below
  end
end

I want to be able to say

"world".hello()

but ruby won’t let me. It complains

in `hello': wrong number of arguments (1 for 0) (ArgumentError)

What am I missing?

Answer 1

This should work

class String
  def hello
    Kernel.send(:hello,self)
  end
end