resize_and_crop.rb

def resize_and_crop(image, size)         
  if image.width < image.height   
    remove = ((image.height - image.width)/2).round 
    image.shave("0x#{remove}") 
  elsif image.width > image.height 
    remove = ((image.width - image.height)/2).round
    image.shave("#{remove}x0")
  end
  image.resize("#{size}x#{size}")
  return image
end