Class: SknUtils::Lists::LinkNode

Inherits:
Object
  • Object
show all
Defined in:
lib/skn_utils/lists/link_node.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(val, anchor_node = nil, strategy = :after) ⇒ LinkNode

Returns a new instance of LinkNode.



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# File 'lib/skn_utils/lists/link_node.rb', line 11

def initialize(val, anchor_node=nil, strategy=:after)
  @value = val
  @prev = nil
  @next = nil

  case strategy
    when :single # after logic
      anchor_node.next = self if anchor_node
    when :before
      @prev = anchor_node.prev if anchor_node
      @next = anchor_node
      anchor_node.prev = self if anchor_node
    when :after
      @prev = anchor_node
      @next = anchor_node.next if anchor_node
      anchor_node.next = self if anchor_node
      @next.prev = self if @next
    when :circle_before
      @prev = anchor_node ? anchor_node.prev : self
      @next = anchor_node ? anchor_node : self
      anchor_node.prev = self if anchor_node
      @prev.next = self if anchor_node
    when :circle_after
      @prev = anchor_node ? anchor_node : self
      @next = anchor_node ? anchor_node.next : self
      anchor_node.next = self if anchor_node
      @next.prev = self if anchor_node
  end
end

Instance Attribute Details

#next ⇒ Object

Returns the value of attribute next.



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# File 'lib/skn_utils/lists/link_node.rb', line 9

def next
  @next
end

#prev ⇒ Object

Returns the value of attribute prev.



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# File 'lib/skn_utils/lists/link_node.rb', line 9

def prev
  @prev
end

#value ⇒ Object

Returns the value of attribute value.



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# File 'lib/skn_utils/lists/link_node.rb', line 9

def value
  @value
end

Instance Method Details

#match_by_value(other_value) ⇒ Object 



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# File 'lib/skn_utils/lists/link_node.rb', line 41

def match_by_value(other_value)
  self.value === other_value
end

#remove! ⇒ Object

returns next node



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# File 'lib/skn_utils/lists/link_node.rb', line 46

def remove!
  next_node = @next
  @value = nil
  @prev = nil
  @next = nil
  next_node
end

#to_s ⇒ Object 



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# File 'lib/skn_utils/lists/link_node.rb', line 54

def to_s
  "Node with value: #{@value}"
end