Method: LazyList::Enumerable#select

Defined in:
lib/lazylist/enumerable.rb

#select(&block) ⇒ Object Also known as: find_all

Returns a lazy list of all elements of this lazy list for which block is true.



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# File 'lib/lazylist/enumerable.rb', line 80

def select(&block)
  block = All unless block
  s = self
  ended = catch(:end_list) do
    until s.empty? or block[s.head]
      s = s.tail
    end
  end
  if s.empty? or ended == :end_list
    empty
  else
    self.class.new(delay { s.head }) { s.tail.select(&block) }
  end
end