Hi,

could someone please explain me what the hack is happening here?

*$* *irb*
*irb(main):001:0>* *2.718281828459045*
=> *2.718281828459045*
*irb(main):002:0>* *Math.tan(2.718281828459045)*
=> *-0.4505495340698077*
*irb(main):003:0>* *-0.4505495340698077 ** 2.718281828459045*
=> *-0.11449187080996949*
*irb(main):004:0>* *Math.tan(2.718281828459045) ** 2.718281828459045*
=> *(-0.07250262422001937+0.08861014593587692i)*
*irb(main):005:0> *


How comes that Complex value here?  (Well, require "complex" isn't mentioned
anywhere and it's not an accident. This is a virgin irb session, the Complex
lib isn't loaded.)

When I type _.class as the next line, I get Complex.  But Complex isn't
loaded
at all.  If I type in require 'complex', I get the answer: true.  That
means, the
Complex class was just loaded, right after the things happening above.

u.