Rubyで配列言語(Array Language)を実現する ref: http://qiita.com/atmarksharp/items/bd881b91d1074cc36f0c

file0.txt

-->sqrt(2)
 ans = 1.4142136 

-->sqrt([1,2,3,4,5])
 ans = 1.  1.4142136  1.7320508  2.  2.236068  

file1.rb

class Shape
  def initialize(x,y)
    @x = x
    @y = y
  end

  def to_s
    "Shape(#{@x},#{@y})"
  end
end

puts "\n=== [1] Single Shape ==="
shape = Shape.new(7,7)
p shape

puts "\n=== [2] Multiple Shapes ==="
points = [[1,1],[1,2],[3,4]]
shapes = points.map do |p|
  Shape.new(p[0],p[1])
end
p points
p shapes

puts "\n=== [3] Calculate Single Value ==="
num = 3
p num
p Math.sqrt(num)

puts "\n=== [4] Calculate Multiple Values ==="
nums = [1,2,3,4,5]
p nums
result = nums.map do |i|
  Math.sqrt(i)
end
p result

file2.txt

=== [1] Single Shape ===
#<Shape:0x007fd38901de98 @x=7, @y=7>

=== [2] Multiple Shapes ===
[[1, 1], [1, 2], [3, 4]]
[#<Shape:0x007fd38901dc18 @x=1, @y=1>, #<Shape:0x007fd38901dbf0 @x=1, @y=2>, #<Shape:0x007fd38901dbc8 @x=3, @y=4>]

=== [3] Calculate Single Value ===
3
1.7320508075688772

=== [4] Calculate Multiple Values ===
[1, 2, 3, 4, 5]
[1.0, 1.4142135623730951, 1.7320508075688772, 2.0, 2.23606797749979]

file3.rb

class Arg
    def initialize(args)
        if args.is_a? Array
            @args = args
        else
            @args = [args]
        end
    end

    def get()
        @args
    end
end

class Iterator
    def self.instance(clazz,args)
        if args.is_a? Arg
            result = args.get.map do |arg|
                clazz.new(arg)
            end

            Arg.new(result)
        else
            raise "Args should be instance of Arg"
        end
    end
end

class Shape
    def self.instance(args)
        Iterator::instance(Shape,args)
    end

    def initialize(args)
        @x = args[0]
        @y = args[1]
    end

    def to_s
        "Shape(#{@x},#{@y})"
    end
end

def sqrt(arg)
    result = arg.get.map do |i|
        Math.sqrt(i)
    end

    Arg.new(result)
end

puts "\n=== [1] Single Shape ==="
shape = Shape::instance(Arg.new([7,7]))
p shape

puts "\n=== [2] Multiple Shapes ==="
args = Arg.new([[1,1],[1,2],[3,4]])
shapes = Shape::instance(args)
p args
p shapes

puts "\n=== [3] Calculate Single Value ==="
num = Arg.new(3)
p num
p sqrt(num)

puts "\n=== [4] Calculate Multiple Values ==="
nums = Arg.new([1,2,3,4,5])
p nums
p sqrt(nums)

file4.rb

sqrt(Arg.new(3))
sqrt(Arg.new(1,2,3,4,5))

file5.txt

=== [1] Single Shape ===
#<Arg:0x007f8131202c90 @args=[#<Shape:0x007f8131202d58 @x=1, @y=1>, #<Shape:0x007f8131202cb8 @x=1, @y=1>]>

=== [2] Multiple Shapes ===
#<Arg:0x007f8131202858 @args=[[1, 1], [1, 2], [3, 4]]>
#<Arg:0x007f8131202768 @args=[#<Shape:0x007f8131202808 @x=1, @y=1>, #<Shape:0x007f81312027b8 @x=1, @y=2>, #<Shape:0x007f8131202790 @x=3, @y=4>]>

=== [3] Calculate Single Value ===
#<Arg:0x007f8131201f98 @args=[3]>
#<Arg:0x007f8131201e30 @args=[1.7320508075688772]>

=== [4] Calculate Multiple Values ===
#<Arg:0x007f8131201c78 @args=[1, 2, 3, 4, 5]>
#<Arg:0x007f8131201a70 @args=[1.0, 1.4142135623730951, 1.7320508075688772, 2.0, 2.23606797749979]>