Class: Array

Inherits:
Object
  • Object
show all
Defined in:
lib/chisel/ruby/array.rb

Instance Method Summary collapse

Instance Method Details

#sort_by_method(method_name, ascending = true) ⇒ Object 



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# File 'lib/chisel/ruby/array.rb', line 2

def sort_by_method(method_name, ascending=true)
  method_name = method_name.to_sym
  self.sort do |left, right|
    if left.respond_to?(method_name) and right.respond_to?(method_name)
      if ascending
        left.public_send(method_name) <=> right.public_send(method_name)
      else
        right.public_send(method_name) <=> left.public_send(method_name)
      end
    else
      raise "Could not sort items #{left} and #{right}. They do not both respond to method '#{method_name.to_s}'"
    end
  end
end

#unique(method_name) ⇒ Object 



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# File 'lib/chisel/ruby/array.rb', line 17

def unique(method_name)
  method_name = method_name.to_sym
  values = []
  
  self.each do |item|
    if item.respond_to?(method_name)
      value = item.send(method_name)
      values << value unless values.index(value)
    else
      raise "Could not pick out unique items: #{item} does not respond to method '#{method_name}'"
    end
  end
  
  values
end