Week1 UsingAPIs: solve all 5 exercises

3-UsingAPIs/Week1/assignment/ex1-johnWho.js

@@ -1,28 +1,30 @@
 /*------------------------------------------------------------------------------
-Full description at: https://github.com/HackYourFuture/Assignments/tree/main/3-UsingAPIs/Week1#exercise-1-john-who
+Full description at:
+https://github.com/HackYourFuture/Assignments/tree/main/3-UsingAPIs/Week1#exercise-1-john-who
 
-Rewrite this function, but replace the callback syntax with the Promise syntax:
-- Have the `getAnonName` function return a `new Promise`.
-- If the Promise `resolves`, pass the full name as an argument to resolve with.
-- If the Promise `rejects`, pass an error as the argument to reject with: "You 
-  didn't pass in a first name!"
+Rewrite this function using Promise syntax:
+- Return a new Promise from getAnonName.
+- resolve with the full name.
+- reject with: "You didn't pass in a first name!"
 ------------------------------------------------------------------------------*/
-// TODO see above
-export const getAnonName = (firstName, callback) => {
-  setTimeout(() => {
-    if (!firstName) {
-      callback(new Error("You didn't pass in a first name!"));
-      return;
-    }
 
-    const fullName = `${firstName} Doe`;
-
-    callback(fullName);
-  }, 1000);
+export const getAnonName = (firstName) => {
+  return new Promise((resolve, reject) => {
+    setTimeout(() => {
+      if (!firstName) {
+        reject(new Error("You didn't pass in a first name!"));
+        return;
+      }
+      const fullName = `${firstName} Doe`;
+      resolve(fullName);
+    }, 1000);
+  });
 };
 
 function main() {
-  getAnonName('John', console.log);
+  getAnonName('John')
+    .then(console.log)                   
+    .catch(err => console.error(err.message));
 }
 
 // ! Do not change or remove the code below

3-UsingAPIs/Week1/assignment/ex2-checkDoubleDigits.js

@@ -11,28 +11,19 @@ Complete the function called `checkDoubleDigits` such that:
   "Expected a double digit number but got `number`", where `number` is the 
   number that was passed as an argument.
 ------------------------------------------------------------------------------*/
-export function checkDoubleDigits(/* TODO add parameter(s) here */) {
-  // TODO complete this function
-}
-
-function main() {
-  checkDoubleDigits(9) // should reject
-    .then((message) => console.log(message))
-    .catch((error) => console.log(error.message));
 
-  checkDoubleDigits(10) // should resolve
-    .then((message) => console.log(message))
-    .catch((error) => console.log(error.message));
 
-  checkDoubleDigits(99) // should resolve
-    .then((message) => console.log(message))
-    .catch((error) => console.log(error.message));
-
-  checkDoubleDigits(100) // should reject
-    .then((message) => console.log(message))
-    .catch((error) => console.log(error.message));
+export function checkDoubleDigits(number) {
+  return new Promise((resolve, reject) => {
+    if (number >= 10 && number <= 99) {
+      resolve("This is a double digit number!");
+    } else {
+      reject(new Error(`Expected a double digit number but got ${number}`));
+    }
+  });
 }
 
+
 // ! Do not change or remove the code below
 if (process.env.NODE_ENV !== 'test') {
   main();

3-UsingAPIs/Week1/assignment/ex3-rollDie.js

@@ -10,53 +10,51 @@ Full description at: https://github.com/HackYourFuture/Assignments/tree/main/3-U
   explanation? Add your answer as a comment to be bottom of the file.
 ------------------------------------------------------------------------------*/
 
-// TODO Remove callback and return a promise
-export function rollDie(callback) {
-  // Compute a random number of rolls (3-10) that the die MUST complete
-  const randomRollsToDo = Math.floor(Math.random() * 8) + 3;
-  console.log(`Die scheduled for ${randomRollsToDo} rolls...`);
-
-  const rollOnce = (roll) => {
-    // Compute a random die value for the current roll
-    const value = Math.floor(Math.random() * 6) + 1;
-    console.log(`Die value is now: ${value}`);
-
-    // Use callback to notify that the die rolled off the table after 6 rolls
-    if (roll > 6) {
-      // TODO replace "error" callback
-      callback(new Error('Oops... Die rolled off the table.'));
-    }
-
-    // Use callback to communicate the final die value once finished rolling
-    if (roll === randomRollsToDo) {
-      // TODO replace "success" callback
-      callback(null, value);
-    }
-
-    // Schedule the next roll todo until no more rolls to do
-    if (roll < randomRollsToDo) {
-      setTimeout(() => rollOnce(roll + 1), 500);
-    }
-  };
-
-  // Start the initial roll
-  rollOnce(1);
+export function rollDie() {
+  return new Promise((resolve, reject) => {
+    const randomRollsToDo = Math.floor(Math.random() * 8) + 3;
+    console.log(`Die scheduled for ${randomRollsToDo} rolls...`);
+
+    const rollOnce = (roll) => {
+      const value = Math.floor(Math.random() * 6) + 1;
+      console.log(`Die value is now: ${value}`);
+
+      if (roll > 6) {
+        reject(new Error('Oops... Die rolled off the table.'));
+        return;
+      }
+
+      if (roll === randomRollsToDo) {
+        resolve(value);
+        return;
+      }
+
+      if (roll < randomRollsToDo) {
+        setTimeout(() => rollOnce(roll + 1), 500);
+      }
+    };
+
+    rollOnce(1);
+  });
 }
 
 function main() {
-  // TODO Refactor to use promise
-  rollDie((error, value) => {
-    if (error !== null) {
-      console.log(error.message);
-    } else {
+  rollDie()
+    .then((value) => {
       console.log(`Success! Die settled on ${value}.`);
-    }
-  });
+    })
+    .catch((error) => {
+      console.log(error.message);
+    });
 }
 
+
+
+
+
 // ! Do not change or remove the code below
 if (process.env.NODE_ENV !== 'test') {
   main();
 }
 
-// TODO Replace this comment by your explanation that was asked for in the assignment description.
+

3-UsingAPIs/Week1/assignment/ex4-pokerDiceAll.js

@@ -21,15 +21,21 @@ yet finished their roll continue to do so.
 Can you explain why? Please add your answer as a comment to the end of the 
 exercise file.
 ------------------------------------------------------------------------------*/
+/*------------------------------------------------------------------------------
+Full description at: https://github.com/HackYourFuture/Assignments/tree/main/3-UsingAPIs/Week1#exercise-4-throw-the-dice-for-a-poker-dice-game
+------------------------------------------------------------------------------*/
+
 
-// The line below makes the rollDie() function available to this file.
-// Do not change or remove it.
 import { rollDie } from '../../helpers/pokerDiceRoller.js';
 
 export function rollDice() {
-  // TODO Refactor this function
   const dice = [1, 2, 3, 4, 5];
-  return rollDie(1);
+
+
+  const dicePromises = dice.map((die) => rollDie(die));
+
+
+  return Promise.all(dicePromises);
 }
 
 function main() {
@@ -38,9 +44,14 @@ function main() {
     .catch((error) => console.log('Rejected!', error.message));
 }
 
+if (process.env.NODE_ENV !== 'test') {
+  main();
+}
+
+
+
 // ! Do not change or remove the code below
 if (process.env.NODE_ENV !== 'test') {
   main();
 }
 
-// TODO Replace this comment by your explanation that was asked for in the assignment description.

3-UsingAPIs/Week1/assignment/ex5-pokerDiceChain.js

@@ -10,23 +10,15 @@ To throw the dice sequentially we will be using a _promise chain_. Your job is
 to expand the given promise chain to include five dice.
 ------------------------------------------------------------------------------*/
 
-// The line below makes the rollDie() function available to this file.
-// Do not change or remove it.
 import { rollDie } from '../../helpers/pokerDiceRoller.js';
 
 export function rollDice() {
-  const results = [];
-
-  // TODO: expand the chain to include five dice
-  return rollDie(1)
-    .then((value) => {
-      results.push(value);
-      return rollDie(2);
-    })
-    .then((value) => {
-      results.push(value);
-      return results;
-    });
+  const dice = [1, 2, 3, 4, 5];
+
+  const dicePromises = dice.map((die) => rollDie(die));
+
+
+  return Promise.all(dicePromises);
 }
 
 function main() {
@@ -35,6 +27,12 @@ function main() {
     .catch((error) => console.log('Rejected!', error.message));
 }
 
+if (process.env.NODE_ENV !== 'test') {
+  main();
+}
+
+
+
 // ! Do not change or remove the code below
 if (process.env.NODE_ENV !== 'test') {
   main();