Consulta

coater.js

var one = function(arg){return 'Hola ' + arg;};
var two = function(arg){return 'Adios ' + arg;};

alert(one('Otoño'));
alert(two('Verano'));

//Siglos después descubrimos que hay que preprocesar el argumento :)

Function.prototype.makeCoat = function() {
  var service = this;
  return function(client) {
     return function(arg){
	    return client.call(this,service(arg));
	 }
  }
}

var coat = function(arg){alert('Preprocesando '+arg);return arg.toUpperCase()}.makeCoat();

one = coat(one);
two = coat(two);

alert(one('Otoño'));
alert(two('Verano'));