gistfile1.txt

if (a OR b OR c)
	if a
	end if
	if b
	end if
	if c
	end if
        [code]
        [code]
        [code]
end if

NB that's in coffeescript, using underscore.js.

My take in Ruby:

class Switch
  def initialize item, &block
    @item = item
    @match = false
    instance_eval &block
    if @match && !@match_block.nil?
      instance_eval &@match_block
    end
  end

  def eq comparator, &block
    if @item == comparator
      instance_eval &block
      @match = true
    end
  end

  def match &block
    @match_block = block
  end
end

def switch item, &block
  Switch.new item, &block
end

test = "a"

switch test do
  eq "a" do
    puts "A"
  end

  eq "b" do
    puts "B"
  end

  match do
    puts "run if either matches"
  end
end