Solution/MayraMacedo

1-callbacks/solution.js

@@ -1,3 +1,4 @@
+// import * as validateUser from './validate-user.js'
 /*
 INSTRUCTIONS
 
@@ -31,16 +32,20 @@ node solution.js name1 name2 name3
 5. another challenge is: after you solve the challenge using callback style, in another file promisify the callback and solve it again
 */
 
-function solution() {
-    // YOUR SOLUTION GOES HERE
+const validate = require('./validate-user')
 
-    // you get your 5 names here
+const names = ['John', 'Mary', 'Richard', 'Stacy','Mayra']
 
-    // iterate the names array and validate them with the method
+function solution(error, cb = null) {
 
-    // log the final result
+    if (!error) {
+        console.log(`Success: ${JSON.stringify(cb)}`)      
+    } else {
+        console.log(`Failure: ${error.message}`)
+    }
 }
 
-solution()
-
+for (const name of names) {
+    validate(name,solution)
+}
 

2-promises/solution.js

@@ -22,18 +22,32 @@ const id = yourRandomMethod() //third run
 6. use promise chaining accordingly to manage sequential process and error handling
 7. log the resultant full name, or the error at the final
 */
+const firstnames = require('./firstnames')
+const lastnames = require('./lastnames')
 
-function solution() {
-    // YOUR SOLUTION GOES HERE
-
-    // You generate your id value here
+const MIN = 0;
+const MAX = 100;
 
-    // You call the lastnames method with your id
+const random = (min, max) =>{
+    return Math.floor((Math.random() * (max - min + 1)) + min);
+}
 
-    // Now, with your recently obtained lastname you call the firstname method
+function solution() {
 
-    // You log the full name here
-    // If there's an error, log it
+    const index = random(MIN,MAX)
+    lastnames(index)
+	.then( (firstNameResponse)=>{
+        firstnames(firstNameResponse)
+            .then((lastNameResponse)=>{
+                console.log(lastNameResponse);
+            }) 
+            .catch((error)=>{       
+                console.log(error.message);
+           }) 
+    })
+    .catch((error)=>{       
+        console.log(error.message);
+   })  
 }
 
 solution()

3-async-await/solution.js

@@ -20,17 +20,63 @@ the format is up to you
 
 8. as an extra challenge add Promise.race() and Promise.any(), and try to get the idea of what happens
 */
+const prices = require('./prices')
+const products = require('./products')
 
-function solution() {
-    // YOUR SOLUTION GOES HERE
 
-    // You generate your id value here
+const idGenerator = () => {
+    const id = Date.now().toString();
+    return parseInt(id.slice(id.length - 2));
+}
+
+const promiseAll = async (id)=> {
+    try{
+    const allPromise = Promise.all([
+        products(id),
+        prices(id),       
+    ])
+
+        const [product,price] = await allPromise;
+        console.log({id,product,price});
+    }
+    catch(error){
+        console.log(error.message);
+    }
+
+}
+
+const promiseAllSettled = async (id) => {
+
+    const [ product, price ]= await Promise.allSettled([
+
+        products(id),
+        prices(id),
+    ])
+
+
+    if (product.reason) {
+        console.log(`PRODUCT: ${product.reason.message}`);
+
+    }
+    if (price.reason) {
+        console.log(`PRICE: ${price.reason.message}`);
+
+    }
 
-    // You use Promise.all here
+    if ((product.value && price.value)) {
 
-    // You use Promise.allSettled here
+        console.log({
+            id,
+            product:product.value,
+            price:price.value,
+        })
+    } 
+}
+function solution() {
 
-    // Log the results or errors here
+    const id = idGenerator();
+    promiseAll(id);
+    promiseAllSettled(id);
 }
 
-solution()
+solution()