From: Hans Fugal <hans@...>
Date: 2002-11-08T06:09:17+09:00
Subject: v.polar = rho, theta

Hi, I'm using the Vector class and needed a way to set the vector with 
polar coordinates. My solution:

class Vector
     def set_polar(rho,theta)
	@elements[0] = rho * Math.cos(theta)
	@elements[1] = rho * Math.sin(theta)
     end
end

But it struck me that defining polar=(rho,theta) would be more 
ruby-like, and I expected to call it like so: v.polar = 1, 3.14
That doesn't work, though. This does, but it's ugly:

irb(main):020:0> v = Vector[0,0]
Vector[0, 0]
irb(main):021:0> v.send(:polar=,1,3.14)
0.001592652916
irb(main):022:0> v.inspect
"Vector[-0.9999987317, 0.001592652916]"

Is there another way, or what should I do?