Module: Enumerable

Included in:
Enumerating::Concatenator, Enumerating::Filter, Enumerating::Merger, Enumerating::Prefetcher, Enumerating::ThreadJoiner, Enumerating::ThreadStarter, Enumerating::Zipper
Defined in:
lib/enumerating/filtering.rb,
lib/enumerating/threading.rb,
lib/enumerating/prefetching.rb

Instance Method Summary collapse

Instance Method Details

#[](n) ⇒ Object 



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# File 'lib/enumerating/filtering.rb', line 110

def [](n)
  dropping(n).first
end

#collecting ⇒ Object Also known as: mapping 



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# File 'lib/enumerating/filtering.rb', line 25

def collecting
  Enumerating::Filter.new do |output|
    each do |element|
      output.call yield(element)
    end
  end
end

#dropping(n) ⇒ Object 



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# File 'lib/enumerating/filtering.rb', line 91

def dropping(n)
  Enumerating::Filter.new do |output|
    each_with_index do |element, index|
      next if index < n
      output.call(element)
    end
  end
end

#dropping_while ⇒ Object 



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# File 'lib/enumerating/filtering.rb', line 100

def dropping_while
  Enumerating::Filter.new do |output|
    taking = false
    each do |element|
      taking ||= !yield(element)
      output.call(element) if taking
    end
  end
end

#prefetching(size) ⇒ Object 



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# File 'lib/enumerating/prefetching.rb', line 37

def prefetching(size)
  Enumerating::Prefetcher.new(self, size)
end

#rejecting ⇒ Object 



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# File 'lib/enumerating/filtering.rb', line 45

def rejecting
  Enumerating::Filter.new do |output|
    each do |element|
      output.call(element) unless yield(element)
    end
  end
end

#selecting ⇒ Object Also known as: finding_all 



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# File 'lib/enumerating/filtering.rb', line 35

def selecting
  Enumerating::Filter.new do |output|
    each do |element|
      output.call(element) if yield(element)
    end
  end
end

#taking(n) ⇒ Object 



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# File 'lib/enumerating/filtering.rb', line 71

def taking(n)
  Enumerating::Filter.new do |output|
    if n > 0
      each_with_index do |element, index|
        output.call(element)
        break if index + 1 == n
      end
    end
  end
end

#taking_while ⇒ Object 



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# File 'lib/enumerating/filtering.rb', line 82

def taking_while
  Enumerating::Filter.new do |output|
    each do |element|
      break unless yield(element)
      output.call(element)
    end
  end
end

#threading(max_threads, &block) ⇒ Object 



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# File 'lib/enumerating/threading.rb', line 46

def threading(max_threads, &block)
  threads = Enumerating::ThreadStarter.new(self, block)
  Enumerating::ThreadJoiner.new(threads.prefetching(max_threads - 1))
end

#uniqing ⇒ Object 



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# File 'lib/enumerating/filtering.rb', line 53

def uniqing
  Enumerating::Filter.new do |output|
    seen = Set.new
    each do |element|
      output.call(element) if seen.add?(element)
    end
  end
end

#uniqing_by ⇒ Object 



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# File 'lib/enumerating/filtering.rb', line 62

def uniqing_by
  Enumerating::Filter.new do |output|
    seen = Set.new
    each do |element|
      output.call(element) if seen.add?(yield element)
    end
  end
end