multisymbol_procs.rb

class Symbol
  def & s
    :"#{self} #{s}"
  end

  def to_proc
    proc do |v|
      to_s.split.inject(v){ |val, m| val.send(m) }
    end
  end
end

[1, nil, 3.0, 'a'].map(&:to_i&:to_s&:to_f) 
# => [1.0, 0.0, 3.0, 0.0]

multisymbol_procs_2.rb

class Symbol
  def method_missing s
    :"#{self} #{s}"
  end

  def to_proc
    proc do |v|
      to_s.split.inject(v){ |val, m| val.send(m) }
    end
  end
end

[1, nil, 3.0, 'a'].map(&:to_i.to_f.zero?)
# => [false, true, false, true]