//Compilation and execution happen together.

var propMap = {
  val: "value", html: "innerHTML"
};

for(var fnName in propMap){
	
  $.prototype[fnName] = (function(prop){
  	return function(){
  	  return this[prop];
  	}
  })(propMap[fnName]);
}

//Type associated with value, not variable.

var a = 1;
a = "one";
a = [1];
a = {one: 1};

//Treat like any object

var square = function(x){ return x*x },  //create

  	 mult = function(f1, f2){            // Return
    		return function(n){
      		return f1(n)*f2(n);
    		}
  	 },

  	 bigF = mult(square, square),        // ARG

value = bigF(2); // 16