Solution/Concepción Orellana

1-callbacks/solution.js

@@ -32,16 +32,52 @@ node solution.js name1 name2 name3
 ** give a look to node.js util.promisify, avoid to alter the validate-user.file **
 */
 
-function solution() {
-    // YOUR SOLUTION GOES HERE
-
-    // you get your 5 names here
+const validateUser = require('./validate-user');
+
+let success = [];
+let failure = [];
+// you get your 5 names here
+const names = [
+	'John',
+	'Barlowe',
+	'Caddel',
+	'Hart',
+	'Katz',
+	'Laurier',
+	'Mary',
+];
+
+function solution(addUser) {
+	// YOUR SOLUTION GOES HERE
+	// iterate the names array and validate them with the method
+	for (let index = 0; index < names.length; index++) {
+		const element = names[index];
+
+		validateUser(element, (error, person) => {
+			// log the final result
+			if (typeof person === 'undefined') {
+				failure.push(error.message)
+			} else {
+				addUser(person, index)
+			}
+		});
+	}
+}
 
-    // iterate the names array and validate them with the method
+function add(person, index) {
+	success.push(person)
 
-    // log the final result
+	if (index == (names.length - 1)) {
+		printResult();
+	}
 }
 
-solution()
+function printResult() {
+	console.log("Success");
+	success.forEach(element => console.log(`ID: ${element.id}, Name: ${element.name}`));
 
+	console.log("Failure");
+	failure.forEach(element => console.log(element));
+}
 
+solution(add);

2-promises/solution.js

@@ -24,16 +24,38 @@ const id = yourRandomMethod() //third run
 7. log the resultant fullname, or the error, at the end
 */
 
-function solution() {
-    // YOUR SOLUTION GOES HERE
-
-    // You generate your id value here
-
-    // You call the lastnames method with your id
+const getFirstName = require('./firstnames');
+const getLastName = require('./lastnames');
 
-    // You call the firstname method
-
-    // You log the fullname, or error, here
+function solution() {
+	// YOUR SOLUTION GOES HERE
+	let fullName = { firstName: null, lastName: null };
+	// You generate your id value here
+	function getRandomId() {
+		if (Math.random() < 0.5) {
+			return null;
+		} else {
+			return Math.floor(Math.random() * 201) - 100;
+		}
+	}
+
+	// You call the lastnames method with your id
+	getLastName(getRandomId())
+		.then((lastName) => {
+			fullName.lastName = lastName;
+			return getFirstName(lastName);
+		})
+
+		// You call the firstname method
+		.then((firstName) => {
+			fullName.firstName = firstName;
+
+			// You log the fullname, or error, here
+			console.log(`fullName: ${fullName.lastName}, ${fullName.firstName}`);
+		})
+		.catch((error) => {
+			console.log(error.message);
+		});
 }
 
-solution()
+solution();

3-async-await/solution.js

@@ -20,16 +20,95 @@ Example:
 9. as extra challenge: add Promise.race() and Promise.any(), and try to get the idea of what happens
 */
 
-function solution() {
-    // YOUR SOLUTION GOES HERE
+const getProduct = require('./products');
+const getPrice = require('./prices');
 
-    // You generate your id value here
+async function solution() {
+	// YOUR SOLUTION GOES HERE
+	let text = { id, product: null, price: null };
 
-    // You use Promise.all() here
+	// You generate your id value here
+	let id = Date.now().toString().slice(-2);
 
-    // You use Promise.allSettled() here
+	// You use Promise.all() here
+	console.log('----segment of Promise.all():');
+	try {
+		await Promise.all([
+			(async () => {
+				const product = await getProduct(+id);
+				text.product = product;
+			})(),
+			(async () => {
+				const price = await getPrice(+id);
+				text.price = price;
+			})(),
+		]);
 
-    // Log the results, or errors, here
+		console.log(text);
+	} catch (error) {
+		console.log(`without data for the id: ${id}`);
+	}
+
+	// You use Promise.allSettled() here
+	console.log('\n----segment of Promise.allSettled():');
+	const promiseSettled = await Promise.allSettled([
+		getPrice(+id),
+		getProduct(+id),
+	]);
+
+	let result = promiseSettled.map((v) => {
+		if (v.status === 'fulfilled') {
+			return v.value;
+		}
+
+		return 'not found';
+	});
+
+	text.price = result[0];
+	text.product = result[1];
+
+	// Log the results, or errors, here
+	console.log(text);
+
+	// You use Promise.any() here
+	console.log('\n----segment of Promise.any():');
+
+	try {
+		const promiseRaced = await Promise.any([getPrice(+id), getProduct(+id)]);
+
+		if (!isNaN(Number(promiseRaced))) {
+			text.price = promiseRaced;
+			delete text.product;
+		} else {
+			text.product = promiseRaced;
+			delete text.price;
+		}
+
+		// Log the results, or errors, here
+		console.log(text);
+	} catch (error) {
+		console.log(`without data for the id: ${id}`);
+	}
+
+	// You use Promise.race() here
+	console.log('\n----segment of Promise.race():');
+
+	try {
+		const promiseRaced = await Promise.race([getPrice(+id), getProduct(+id)]);
+
+		if (!isNaN(Number(promiseRaced))) {
+			text.price = promiseRaced;
+			delete text.product;
+		} else {
+			text.product = promiseRaced;
+			delete text.price;
+		}
+
+		// Log the results, or errors, here
+		console.log(text);
+	} catch (error) {
+		console.log(`without data for the id: ${id}`);
+	}
 }
 
-solution()
+solution();