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const promise = checkWeather('Delhi');

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checkWeather('Delhi', (weather) => {  	   	
   if (weather === 'well') {  		
   return checkFlights('Mumbai', (flights) => {  			 			

    buyTicket(flights[0], (ticket) => {  				 				
     console.log('ticket no. %d', ticket.number);  			
    });  		
  });  
 }    	
console.log('the weather is bad');  

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const makeBurger = nextStep => {
  getPotato(function (potato) {
    cookPotato(potato, function (cookedPotato) {
      getBuns(function (buns) {
        putPattyBetweenBuns(buns, potato, function(burger) {
          nextStep(burger)
        })
      })
    })
  })

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const makeBurger = () => {
  getPotato(function(potato) {
    cookPotato(potato, function(cookedPotato) {
      getBuns(function(buns) {
        putPattyBetweenBuns(buns, potato, function(burger) {
            // Serve the burger
        });
      });
    });
  });

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const makeBurger = () => {
  getPotato(function(potato) {
    cookPotato(potato, function(cookedPotato) {
      getBuns(function(buns) {
        // Put patty in bun
      });
    });
  });
};

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const makeBurger = () => {
  getPotato(function(potato) {
    // We can only cook potato after we get it.
  });
};

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const makeBurger = () => {
  const potato = getPotato();
  const patty = cookPotato(potato);
  const buns = getBuns();
  const burger = putPattyBetweenBuns(buns, patty);
  return burger;
};

const burger = makeBurger();
serve(burger);

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console.log('Learning')

setTimeout(function() {
  console.log('Asynchronous')
}, 5000)

console.log('JavaScript')

/* Output:
  

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console.log('Learning')

console.log('Asynchronous')

console.log('JavaScript')

/* Output:
  
  Learning
  Asynchronous

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 "start": "webpack-dev-server --mode development --hot --open",