Module: SimpleTree::InstanceMethods

Defined in:
lib/simple_tree.rb

Instance Method Summary collapse

Instance Method Details

#ancestors ⇒ Object

Returns list of ancestors, starting from parent until root.

subchild1.ancestors # => [child1, root]



24
25
26
27
28
 
# File 'lib/simple_tree.rb', line 24

def ancestors
  node, nodes = self,[]
  nodes << node = node.parent while node.parent
  nodes
end

#child? ⇒ Boolean

Returns:

  • (Boolean) 


46
47
48
 
# File 'lib/simple_tree.rb', line 46

def child?
  self.parent != nil
end

#descendants ⇒ Object 



63
64
65
66
67
68
 
# File 'lib/simple_tree.rb', line 63

def descendants
  return [] if children.empty?
  nodes = children
  children.each {|c| nodes = nodes + c.descendants}
  nodes
end

#move_to_child_of(parent) ⇒ Object 



75
76
77
 
# File 'lib/simple_tree.rb', line 75

def move_to_child_of(parent)
  self.parent = parent
end

#root ⇒ Object

Returns the root node of the tree.



36
37
38
39
40
 
# File 'lib/simple_tree.rb', line 36

def root
  node = self
  node = node.parent while node.parent
  node
end

#root? ⇒ Boolean

Returns:

  • (Boolean) 


42
43
44
 
# File 'lib/simple_tree.rb', line 42

def root?
  self.root == self
end

#self_and_ancestors ⇒ Object 



30
31
32
33
 
# File 'lib/simple_tree.rb', line 30

def self_and_ancestors
  nodes = [] << self
  nodes += self.ancestors
end

#self_and_descendants ⇒ Object 



70
71
72
73
 
# File 'lib/simple_tree.rb', line 70

def self_and_descendants
  node = [] << self
  node += self.descendants 
end

#self_and_siblings ⇒ Object

Returns all siblings and a reference to the current node.

subchild1.self_and_siblings # => [subchild1, subchild2]



59
60
61
 
# File 'lib/simple_tree.rb', line 59

def self_and_siblings
  parent ? parent.children : []
end

#siblings ⇒ Object

Returns all siblings of the current node.

subchild1.siblings # => [subchild2]



52
53
54
 
# File 'lib/simple_tree.rb', line 52

def siblings
  self_and_siblings - [self]
end