Class: Arrow::Slicer::NotEqualCondition

Inherits:
Condition
  • Object
show all
Defined in:
lib/arrow/slicer.rb

Instance Method Summary collapse

Methods inherited from Condition

#&, #^, #|

Constructor Details

#initialize(column, value) ⇒ NotEqualCondition

Returns a new instance of NotEqualCondition.



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# File 'lib/arrow/slicer.rb', line 243

def initialize(column, value)
  @column = column
  @value = value
end

Instance Method Details

#!@ ⇒ Object 



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# File 'lib/arrow/slicer.rb', line 248

def !@
  EqualCondition.new(@column, @value)
end

#evaluate ⇒ Object 



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# File 'lib/arrow/slicer.rb', line 252

def evaluate
  case @value
  when nil
    if @column.n_nulls.zero?
      raw_array = [true] * @column.n_rows
    else
      raw_array = @column.n_rows.times.collect do |i|
        @column.valid?(i)
      end
    end
    BooleanArray.new(raw_array)
  else
    raw_array = @column.collect do |value|
      if value.nil?
        nil
      else
        @value != value
      end
    end
    BooleanArray.new(raw_array)
  end
end