Module: Hanoi::Jane::StackFinder

Included in:
Towers
Defined in:
lib/hanoi/jane/towers/stack_finders.rb

Instance Method Summary collapse

Instance Method Details

#find_stack(stacks:, from:, disc:, total: nil) ⇒ Object 



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# File 'lib/hanoi/jane/towers/stack_finders.rb', line 4

def find_stack stacks:, from:, disc:, total: nil
  # if the next stack is empty, move there
  if stacks[(from + 1) % 3] == []
    return (from + 1) % 3
  end

  # if the next stack has a smaller top disc than our disc, go one more over
  if stacks[(from + 1) % 3][-1] < disc
    return (from + 2) % 3
  end

  # default to the next one
  return (from + 1) % 3
end