Tutoring notes — 5/27/2013

gistfile1.js

var increment = (function () {
  
  var foo = 1;
  
  return function () {
    return foo++;
  };

} ());

increment();
increment();
increment();

///////

var makeIncrementer = function () {
  
  var foo = 1;
  
  return function () {
    return foo++;
  };

};

var incrementer1 = makeIncrementer();
var incrementer2 = makeIncrementer();

incrementer1(); // 2
incrementer1(); // 3
incrementer2(); // 2
incrementer2(); // 3