there-is-no-hell.js

// bad

// something async...
function doSomething(){
  setTimeout(function(){
    console.log('something 1')
    // something async...
    setTimeout(function(){
      console.log('something 2')
      // something async...
      setTimeout(function(){
        console.log("We're done!")
      }, 1000)
    }, 1000)
  }, 1000)
}


// good

function doSomething(){
  // something async...
  setTimeout(something1, 1000)
}

function something1(){
  // something async...
  console.log('something 1')
  setTimeout(something2, 1000)
}

function something2(){
  // something async
  console.log('something 2')
  setTimeout(wereDone, 1000)
}

function wereDone(){
  console.log("We're done!")
}

// even more good!

async.series([
  function(done){
    setTimeout(done, 1000)
  }
  , function(done){
    console.log('something 1')
   setTimeout(done, 1000)
  }
  , function(done){
    console.log('something 2')
    setTimeout(done, 1000)
  }
  , function(){
    console.log("We're done!")
  }
])