Class: Range

Inherits

Object

• Object
• Range

show all

Defined in

lib/kyanite/range.rb,
lib/kyanite/enumerable/structure.rb

Instance Method Summary (collapse)

• - (Range) invert_index

  Given a range for selecting a section of a String or an Array, invert_index inverts this range, so that the result selects the inverse part of the String or Array.

• - (false) is_collection?

  false -- Defined for all objects: Do I contain multiple objects? String and Range are not considered as collection.

# return back 
(0..5).invert_index
=> (6..-1)

# return front 
(3..-1).invert_index
=> (0..2)

# return outer
(2..4).invert_index
=> [0..1,   5..-1]

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# File 'lib/kyanite/range.rb', line 47

def invert_index

  # back
  if first == 0
    return (1..0)           if last == -1     # leer
    return (last+1..-1)                       # hinterer Teil

  # front
  else 
    return (0..first-1)     if last == -1     # vorderer Teil
    
  end
  
  # outer
  return [(first..-1).invert_index, (0..last).invert_index]
end

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# File 'lib/kyanite/enumerable/structure.rb', line 36

def is_collection?;                 false;          end