Class: Enumerator

Inherits:
Object show all
Defined in:
lib/lazy_enumerator.rb

Instance Method Summary collapse

Instance Method Details

#lazy_map(&block) ⇒ Object 



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# File 'lib/lazy_enumerator.rb', line 23

def lazy_map(&block)
  Enumerator.new do |yielder| 
    self.each do |value| 
      yielder.yield(block.call(value))
    end
  end
end

#lazy_select(&block) ⇒ Object 



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# File 'lib/lazy_enumerator.rb', line 15

def lazy_select(&block)
  Enumerator.new do |yielder| 
    self.each do |val| 
      yielder.yield(val) if block.call(val) 
    end
  end
end

#lazy_sort_by(&block) ⇒ Object 



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# File 'lib/lazy_enumerator.rb', line 3

def lazy_sort_by(&block)
  Enumerator.new do |yielder|
    index = 0
    sorted = sort_by(&block)
    loop do
      yielder.yield sorted[index]
      index += 1
      break if sorted.size == index
    end
  end
end