Class: Stupidedi::Zipper::Hole

Inherits:
AbstractPath show all
Defined in:
lib/stupidedi/zipper/path.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(left, parent, right) ⇒ Hole

Returns a new instance of Hole.



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# File 'lib/stupidedi/zipper/path.rb', line 91

def initialize(left, parent, right)
  @left, @parent, @right =
    left, parent, right
end

Instance Attribute Details

#left ⇒ Array<#leaf?, #children, #copy> (readonly)

Contains the node’s rightward siblings, sorted nearest to furthest

Returns:

  • (Array<#leaf?, #children, #copy>) 


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# File 'lib/stupidedi/zipper/path.rb', line 83

def left
  @left
end

#parent ⇒ AbstractPath (readonly)

Returns:



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# File 'lib/stupidedi/zipper/path.rb', line 86

def parent
  @parent
end

#right ⇒ Array<#leaf?, #children, #copy> (readonly)

Contains the node’s leftward siblings, sorted nearest to furthest

Returns:

  • (Array<#leaf?, #children, #copy>) 


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# File 'lib/stupidedi/zipper/path.rb', line 89

def right
  @right
end

Instance Method Details

#==(other) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/stupidedi/zipper/path.rb', line 121

def ==(other)
  depth    == other.depth and
  position == other.position
end

#depth ⇒ Integer

Distance from the root node

Returns:



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# File 'lib/stupidedi/zipper/path.rb', line 107

def depth
  1 + @parent.depth
end

#first? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/stupidedi/zipper/path.rb', line 102

def first?
  @left.empty?
end

#inspect ⇒ String

Returns:



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# File 'lib/stupidedi/zipper/path.rb', line 116

def inspect
  "#{@parent.inspect}/#{@left.length}"
end

#last? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/stupidedi/zipper/path.rb', line 97

def last?
  @right.empty?
end

#position ⇒ Object 



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# File 'lib/stupidedi/zipper/path.rb', line 111

def position
  @left.length
end