JS Master Class Ex 2

02_add_closure.js

// Exercise 2 - Closures
// Wrap the following code in a closure and export only the "countdown" function.

(function(scope, functionName) {
  var index;
  
  function log(){
    console.log(index);
  }

  function iterate(){
    log();
    if(index>1) setTimeout(iterate, 1000);
    index--;
  }

  function countdown(){
    index = 10;
    iterate();
  }

  scope[functionName] = countdown;  
})(this, 'countDown');

countDown();

02_add_closure_v2.js

var countdown = (function() {
  var index;
  
  function log(){
    console.log(index);
  }

  function iterate(){
    log();
    if(index>1) setTimeout(iterate, 1000);
    index--;
  }

  function countdown(){
    index = 10;
    iterate();
  }

  return countdown;  
})();