Module: Enumerable

Defined in:
lib/lazing/filters.rb,
lib/lazing/transformers.rb

Instance Method Summary collapse

Instance Method Details

#mapping(&blk) ⇒ Object Also known as: collecting

Lazy version of Enumerable#map

Returns the lazy collection formed by applying the given block to each member of the collection.



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# File 'lib/lazing/transformers.rb', line 6

def mapping(&blk)
  Enumerator.new do |yielder|
    each do |item|
      yielder.yield blk.call(item)
    end
  end
end

#rejecting(&blk) ⇒ Object

Lazy version of Enumerable#reject.

Returns a lazy collection containing all elements of the collection for which the provided block returns false.



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# File 'lib/lazing/filters.rb', line 6

def rejecting(&blk)
  Enumerator.new do |yielder|
    each do |item|
      yielder.yield item unless blk.call(item)
    end
  end
end

#selecting(&blk) ⇒ Object Also known as: finding_all

Lazy version of Enumerable#select

Returns a lazy collection containing all elements of the collection for which the provided block returns true.



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# File 'lib/lazing/filters.rb', line 18

def selecting(&blk)
  Enumerator.new do |yielder|
    each do |item|
      yielder.yield item if blk.call(item)
    end
  end
end