gistfile1.rb

def conjunctionSelect obj,arg,*args
  res = []
  for i in obj
    res << i if ([arg]+args).inject do |acc,n|
      n.call(i) && acc.call(i)
    end
    #res << i if ([arg]+args).all? {|n| n.call(i)}
  end
  res
end

class Array
  def all?
    if block_given? then
      self.inject do |acc,i|
        yield(acc) && yield(i)
      end
    else
      self.inject do |acc,i|
        acc && i
      end
    end
  end

  def any? &b
    unless b then
      self.inject do |acc,i|
        acc || i
      end
    else
      self.inject do |acc,i|
        b.call(acc) || b.call(i)
      end
    end
  end
end
p [-1,9,1].any?{|i| i>0}
p [1,2,3,-6].all?{|i|i<0}