Class: Iter::Elem

Inherits:
BasicObject
Includes:
Comparable
Defined in:
lib/epitools/iter.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(iter, val) ⇒ Elem

Returns a new instance of Elem.



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# File 'lib/epitools/iter.rb', line 74

def initialize(iter, val)
  @iter = iter
  @val  = val.is_a?(Elem) ? val.value : val
  @visited = false
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args) ⇒ Object 



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# File 'lib/epitools/iter.rb', line 153

def method_missing(name, *args)
  @val.send(name, *args)
end

Instance Attribute Details

#val ⇒ Object

Returns the value of attribute val.



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# File 'lib/epitools/iter.rb', line 72

def val
  @val
end

#visited ⇒ Object

Returns the value of attribute visited.



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# File 'lib/epitools/iter.rb', line 72

def visited
  @visited
end

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'lib/epitools/iter.rb', line 164

def <=>(other)
  case other
  when Elem
    @val <=> other.value
  else
    @val <=> other
  end
end

#container ⇒ Object 



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# File 'lib/epitools/iter.rb', line 84

def container
  @iter.container
end

#current ⇒ Object 



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# File 'lib/epitools/iter.rb', line 88

def current
  self
end

#elem? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/epitools/iter.rb', line 80

def elem?
  true
end

#inspect ⇒ Object 



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# File 'lib/epitools/iter.rb', line 157

def inspect
  "<Elem: #{@val.inspect}>"
end

#move_after(other) ⇒ Object 



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# File 'lib/epitools/iter.rb', line 132

def move_after(other)
  remove
  container.insert(other.pos+1, self) # insert after pos
end

#move_before(other) ⇒ Object 



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# File 'lib/epitools/iter.rb', line 127

def move_before(other)
  remove
  container.insert(other.pos, self) # insert at pos and shift everything over
end

#move_first ⇒ Object Also known as: move_start 



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# File 'lib/epitools/iter.rb', line 137

def move_first
  remove
  container.insert(0, self) # insert at beginning
end

#move_last ⇒ Object Also known as: move_end 



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# File 'lib/epitools/iter.rb', line 143

def move_last
  remove
  container.insert(-1, self) # insert at end
end

#next ⇒ Object 



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# File 'lib/epitools/iter.rb', line 96

def next
  p = pos+1
  if p >= container.size
    nil
  else
    container[p]
  end
end

#pos ⇒ Object 



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# File 'lib/epitools/iter.rb', line 123

def pos
  container.index(self)
end

#prev ⇒ Object 



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# File 'lib/epitools/iter.rb', line 105

def prev
  p = pos-1
  if p < 0
    nil
  else
    container[p]
  end
end

#remove ⇒ Object Also known as: delete 



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# File 'lib/epitools/iter.rb', line 114

def remove
  container.delete_at(pos)
end

#replace_with(replacement) ⇒ Object 



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# File 'lib/epitools/iter.rb', line 119

def replace_with(replacement)
  container[pos] = Elem.new(@iter, replacement)
end

#value ⇒ Object 



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# File 'lib/epitools/iter.rb', line 149

def value
  @val
end

#visited? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/epitools/iter.rb', line 92

def visited?
  @visited
end