Class: Tree

Inherits:

Object

• Object
• Tree

Defined in:

lib/binary_trees.rb

Instance Method Summary

• #initialize(root = nil) ⇒ Tree constructor

  A new instance of Tree.

• #sum(root = @root) ⇒ Object
• #to_a(root = @root, arr = [], idx = 0) ⇒ Object

Constructor Details

#initialize(root = nil) ⇒ Tree

Returns a new instance of Tree.

# File 'lib/binary_trees.rb', line 24

def initialize(root = nil)
  @root = root
end

Instance Method Details

#sum(root = @root) ⇒ Object

# File 'lib/binary_trees.rb', line 28

def sum(root = @root)
  return 0 if root.nil?

  root.val + sum(root.left) + sum(root.right)
end

#to_a(root = @root, arr = [], idx = 0) ⇒ Object

# File 'lib/binary_trees.rb', line 34

def to_a(root = @root, arr = [], idx = 0)
  return [] if root.nil?

  arr[idx] = root.val
  to_a(root.left, arr, idx * 2 + 1) if root.left
  to_a(root.right, arr, idx * 2 + 2) if root.right
  arr
end