Class: Bmg::Ordering

Inherits:
Object
  • Object
show all
Defined in:
lib/bmg/support/ordering.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attrs) ⇒ Ordering

Returns a new instance of Ordering.



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# File 'lib/bmg/support/ordering.rb', line 4

def initialize(attrs)
  @attrs = attrs
end

Instance Attribute Details

#attrs ⇒ Object (readonly)

Returns the value of attribute attrs.



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# File 'lib/bmg/support/ordering.rb', line 7

def attrs
  @attrs
end

Instance Method Details

#comparator ⇒ Object 



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# File 'lib/bmg/support/ordering.rb', line 9

def comparator
  ->(t1, t2) {
    attrs.each do |(attr,direction)|
      c = t1[attr] <=> t2[attr]
      return (direction == :desc ? -c : c) unless c==0
    end
    0
  }
end