Zero nested callbacks

function init(){;
  //init code
  some.event(function callback1(){;
    // callback 1 code
    other.event(function callback2(){;
      // callback 2 code
      another.event(function callback3(){;
        // callback 3 code
      }) 
    })  
  })  
}

Instead of a lots of nested callbacks or creating a lot of named functions in your javascript (for node.js or browsers) you can use something like this:

function fullProcess(){
 this._step = ++this._step || 0;
 switch(this._step){
  case 0:
   // init code 
   some.event(fullProcess) 
  break;
  case 1:
   // callback 1 code
   other.event(fullProcess)
  break;
  case 2:
   // callback 2 code
   another.event(fullProcess)
  break;
  case 3:
   // callback 3 code
  break;
 } 
}

Be aware that the "this" keyword is referring to the global object and not the function.