msd-2022-spring-cs477-homework1

Lab 1

Exercise 1

Write the necessary Node script to make this code work for all arrays: [1,2,3,4,5,6,7,8].even(); // [2,4,6,8] [1,2,3,4,5,6,7,8].odd(); // [1,3,5,7] Test your code in Node.JS CLI

Exercise 2

1. Explain why do we want sometimes to use setImmediate instead of using setTimeout?

2. Explain the difference between process.nextTick and setImmediate?

3. Name 10 global modules/methods available in Node environment.

Exercise 3 (Optional)

// Fix the slow function to be asynchronous/non-blocking
function slow(callback){ 
	for(let i=0; i<= 5e8; i++){}
	if (Math.random() > 0.5) { 	
		return callback("Error",null) 
	} 
	callback(null, {id:12345}) 
} 

function exec(fn){ 
	// Complete the code here to implement chaining with callback
}

exec(slow).done(function(data){ console.log(data); })
	.fail(function(err){ console.log("Error: " + err); });