fun with procs

01stack.rb

require 'ostruct'

Stack = (->() {
  struct = OpenStruct.new

  _data = []

  struct.push = ->(thing) {
    _data << thing
  }

  struct.pop = ->() {
    _data.pop
  }

  struct.data = ->() {
    _data
  }

  struct
}).call

Stack.push.call 1
Stack.push.call 2
Stack.push.call 3

puts Stack.data.call.inspect

Stack.pop.call

puts Stack.data.call.inspect

02stack.js

var Stack = (function() {
  var stack = {}
  , _data = [];
  
  var stack.push = function(thing) {
    _data.push(thing);
  };
  
  var stack.pop = function() {
    return _data.pop();
  };
  
  var stack.data = function() {
    return _data;
  };
  
  return stack;
}());
 
Stack.push(1);
Stack.push(2);
Stack.push(3);
 
console.log(Stack.data());
 
Stack.pop();
 
console.log(Stack.data());