1_th_promises.js

var getData = new Promise(function(resolve, reject){

	// Do something asynchronous and pass it a callback
	getDataFromAMillionMilesAway(function(data){
		
		if(data){
			resolve(data);
		}
		else {
			reject(new Error("Thats too far away"));
		}

	});	
	
});

getData().then(function(data){
	console.log('Got Some Data! ', data);
});

2.js

getData().then(
	function(data){
		console.log('Got Some Data! ', data);
	},
	function(error){
		console.log('Something really bad happened :( ', data);
	}
);

3.js

var getData = function(config){

	return new Promise(function(resolve, reject){

		// Do something asynchronous and pass it a callback
		getDataFromAMillionMilesAway(config, function(data){
			
			if(data){
				resolve(data);
			}
			else {
				reject(new Error("Thats too far away"));
			}

		});	
		
	});

}

4.js

getData(config1)
	.then(getData(config2))
		.then(getData(config3))
			.then(function(){
	console.log('All the data was fetched sequentially.')
});

5.js

getData(config).then(function(data){
	 data = _.extend({}, data, {'key','valye'});
	 return data;
}).then(function(modifiedData){
	console.log(modifiedData);
});

6.js

getData(config)
	.then(function(data){
		return JSON.parse(data);
	})
	.then(function(parsedData){
		console.log(parsedData);
	});

is equivalent too

getData(config)
	.then(JSON.parse)
		.then(function(parsedData){
			console.log(parsedData);
	});