Getting an indication of the number of arguments accepted by a method
Posted by root Mon, 16 Jun 2008 08:57:00 GMT
class Object
def arguments?(*methods)
methods.each do |method|
begin
rval = self.method(method).arity
if rval > 0
puts "'#{method}' takes fixed (#{rval}) number of argument"
elsif rval < 0
puts "'#{method}' takes variable number of arguments"
elsif rval == 0
puts "'#{method}' takes no arguments"
end
rescue
puts $!
end
end
end
end
String.new.arguments?(:size, :to_i, :scan, :flatten)