Samira w3 exercises

Week1/prep-exercises/1-traffic-light/traffic-light-1.js

@@ -11,21 +11,12 @@ let rotations = 0;
 while (rotations < 2) {
   const currentState = trafficLight.state;
   console.log("The traffic light is on", currentState);
-
-  // TODO
-  // if the color is green, turn it orange
-  // if the color is orange, turn it red
-  // if the color is red, add 1 to rotations and turn it green
 }
 
-/**
- * The output should be:
+if (currentState === "green") { trafficLight.state = "orange"; 
 
-The traffic light is on green
-The traffic light is on orange
-The traffic light is on red
-The traffic light is on green
-The traffic light is on orange
-The traffic light is on red
+} else if (currentState === "orange") { trafficLight.state = "red";
 
-*/
+ } else if (currentState === "red") { trafficLight.state = "green";
+   rotations++; 
+  }

Week1/prep-exercises/1-traffic-light/traffic-light-2.js

@@ -1,9 +1,5 @@
 "use strict";
-/**
- * The `possibleStates` property define the states (in this case: colours)
- * in which the traffic light can be.
- * The `stateIndex` property indicates which of the possible states is current.
- */
+
 const trafficLight = {
   possibleStates: ["green", "orange", "red"],
   stateIndex: 0,
@@ -14,20 +10,14 @@ while (cycle < 2) {
   const currentState = trafficLight.possibleStates[trafficLight.stateIndex];
   console.log("The traffic light is on", currentState);
 
-  // TODO
-  // if the color is green, turn it orange
-  // if the color is orange, turn it red
-  // if the color is red, add 1 to cycles and turn it green
-}
-
-/**
- * The output should be:
-
-The traffic light is on green
-The traffic light is on orange
-The traffic light is on red
-The traffic light is on green
-The traffic light is on orange
-The traffic light is on red
+  if (currentState === "green")
+     {  trafficLight.stateIndex = 1; 
+      } else if (currentState === "orange") 
+        {  trafficLight.stateIndex = 2 ;
 
-*/
+        } else if (currentState === "red") { 
+         trafficLight.stateIndex = 0; 
+
+         cycle++;
+         } 
+        }

Week3/challenges/1-sum-entries.js

@@ -10,7 +10,14 @@ Once you have found those numbers, multiply the numbers and store the result of
 const list = [1721, 979, 366, 299, 675, 1456];
 let result;
 
-// Write your code here
+for (let i =0; i , list.length; i++) {
+    for ( let j = i + 1; j < list.length; j++ ) {
+        if (list[i] + list[j] === 2020 ){
+            result = list[i] * list[j];
+            break;
+        }
+    }
+}
 
 
 // TEST CODE, do not change

Week3/challenges/2-sum-three-entries.js

@@ -10,7 +10,16 @@ Once you have found those numbers, multiply the numbers and store the result of
 const list = [1721, 979, 366, 299, 675, 1456];
 let result;
 
-// Write your code here
+for (let i =0; i < list.length; i++) {
+    for ( let j = i + 1; j < list.length; j++ ) {
+        for ( let k = j + 1; k < list.length; k++ ) {
+            if (list[i] + list[j] + list[k] === 2020 ){
+                result = list[i] * list[j] * list[k];
+                break;
+            }
+        }
+    }
+}
 
 
 // TEST CODE, do not change

Week3/challenges/3-password-validation.js

@@ -20,4 +20,11 @@ const passwordList = [
     { times: '1-3', letter: 'a', password: 'abcde'},
     { times: '1-3', letter: 'b', password: 'cdefg'},
     { times: '2-9', letter: 'c', password: 'ccccccccc'}
-];
+];
+passwordList.forEach(item => {
+    const [ min, max] = item.times.split("-").map(Number);
+    const leetterCount = item.password.split("").filter(char => char === item.letter).length;
+    const isValid = leetterCount >= min && leetterCount <= max;
+
+    console.log(`Password '${item.password}' is ${isValid? "VALID" : "INVALID"}`);
+})

Week3/challenges/4-bank-account.js

@@ -28,10 +28,32 @@ const bankAccount = {
 };
 
 const donateMoney = (amount, onSuccess, onFail) => {
-  // TODO complete this function
+  if (bankAccount.currentBalance >= amount) {
+    bankAccount.currentBalance -= amount;
+
+    bankAccount.transactions.push({
+      prevAmount: bankAccount.currentBalance + amount,
+      newAmount: bankAccount.currentBalance,
+      reason: "Donation",
+    });
+    onSuccess();
+  }else {
+    onFail();
+  }
 };
 const payRent = (amount, onSuccess, onFail) => {
-  // TODO complete this function
+  if (bankAccount.currentBalance >= amount) {
+    bankAccount.currentBalance -= amount;
+
+    bankAccount.transactions.push({
+      prevAmount: bankAccount.currentBalance + amount,
+      newAmount: bankAccount.currentBalance,
+      reason: "Rent",
+    });
+    onSuccess();
+  } else {
+    onFail();
+  }
 };
 
 /**

Week3/prep-exercises/1-hyf-program/1-find-mentors.js

@@ -8,7 +8,9 @@ import { modules, students, mentors, classes } from "./hyf.js";
  *  ['John', 'Mary']
  */
 const possibleMentorsForModule = (moduleName) => {
-  // TODO complete this function
+  const mentorsTeachingModule = mentors.filter((mentor) => mentor.canTeach.includes(moduleName));
+
+   return mentorsTeachingModule.map((mentor) => mentor.name);
 };
 // You can uncomment out this line to try your function
 // console.log(possibleMentorsForModule('using-apis'));
@@ -20,7 +22,14 @@ const possibleMentorsForModule = (moduleName) => {
  * It should return a single name.
  */
 const findMentorForModule = (moduleName) => {
-  // TODO complete this function
+  const possibleMentors = possibleMentorsForModule(moduleName);
+
+  if (!possibleMentors.length) {
+    console.error(`No mentors found for module ${moduleName}`);
+    return;
+  }
+
+  return possibleMentors[Math.floor(Math.random() * possibleMentors.length)];
 };
 // You can uncomment out this line to try your function
 // console.log(findMentorForModule('javascript'));

Week3/prep-exercises/1-hyf-program/2-class-list.js

@@ -12,7 +12,18 @@ import { modules, students, mentors, classes } from "./hyf.js";
  *  [{ name: 'John', role: 'student' }, { name: 'Mary', role: 'mentor' }]
  */
 const getPeopleOfClass = (className) => {
-  // TODO complete this function
+  const classInfo = classes.find(cls => cls.name === className);
+  if (!classInfo) {
+    console.error(`Class ${className} not found.`);
+    return [];
+  }
+  const studentsOfClass = students.filter(students => students.class === className)
+  .map(students => ({ name: students.name, role:'student' }));
+
+  const mentorsOfClass = mentors.filter(mentors => mentors.nowTeaching === classInfo.currentModule)
+  .map(mentors => ({ name: mentors.name, role:'mentor' }));
+
+  return [...studentsOfClass,...mentorsOfClass];
 };
 // You can uncomment out this line to try your function
 // console.log(getPeopleOfClass('class34'));
@@ -30,7 +41,13 @@ const getPeopleOfClass = (className) => {
  *  }
  */
 const getActiveClasses = () => {
-  // TODO complete this function
+  const activeClasses = classes.filter(cls => cls.active);
+
+  const result = {};
+  activeClasses.forEach(activeClasses => {
+    result[activeClasses.name] = getPeopleOfClass(activeClasses.name);
+  });
+  return result;
 };
 // You can uncomment out this line to try your function
 // console.log(getActiveClasses());