Module: TreeMap::Relation

Defined in:
lib/tree_map/tree_map.rb

Constant Summary collapse

LOWER = 
1
FLOOR = 
2
EQUAL = 
3
CREATE = 
4
CEILING = 
5
HIGHER = 
6

Class Method Summary collapse

Class Method Details

.for_order(relation, ascending) ⇒ Object 



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# File 'lib/tree_map/tree_map.rb', line 19

def self.for_order(relation, ascending)
  if ascending
    relation
  else
    case relation
    when LOWER
      HIGHER
    when FLOOR
      CEILING
    when EQUAL
      EQUAL
    when CEILING
      FLOOR
    when HIGHER
      LOWER
    else
      raise "Unknown relation: #{relation.inspect}"
    end
  end
end