Add solution to challenges of week 3

aniktoris · aniktoris · commit 3ba2581a96e2 · 2023-09-06T12:30:41.000+02:00
diff --git a/Week2/prep-exercises/2-experiments/index.js b/Week2/prep-exercises/2-experiments/index.js
@@ -20,17 +20,10 @@ function runExperiment(sampleSize) {
 
 function main() {
   const sampleSizes = [100, 1000, 1000000];
-  const allResults = [];
 
   for(const sampleSize of sampleSizes){
-    const experimentResults = runExperiment(sampleSize);
-    allResults.push([experimentResults, sampleSize]);
+    console.log(runExperiment(sampleSize), sampleSize);
   }
-  return allResults;
 }
 
-const results = main();
-
-for(const [experimentResults, sampleSize] of results){
-  console.log(experimentResults, sampleSize);
-}
+main();
diff --git a/Week3/challenges/1-sum-entries.js b/Week3/challenges/1-sum-entries.js
@@ -9,9 +9,13 @@ 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
 
+list.forEach((number, ind) => {
+  for(let i= ind+1; i<list.length; i++){
+    if(number + list[i] === 2020)
+    return result = number*list[i]
+  }
+})
 
 // TEST CODE, do not change
 console.assert(result === 514579, `The result is not correct, it is ${result}, but should be 514579`);
diff --git a/Week3/challenges/2-sum-three-entries.js b/Week3/challenges/2-sum-three-entries.js
@@ -10,8 +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
-
+list.forEach((number, ind) => {
+  for(let i= ind+1; i<list.length; i++){
+    for(let j = i+1; j<list.length; j++){
+    if(number + list[i] + list[j] === 2020)
+    return result = number*list[i]*list[j]
+  }
+}
+})
 
 // TEST CODE, do not change
 console.assert(result === 241861950, `The result is not correct, it is ${result}, but should be 241861950`);
diff --git a/Week3/challenges/3-password-validation.js b/Week3/challenges/3-password-validation.js
@@ -3,7 +3,8 @@
  * Credit to https://adventofcode.com/ for this exercise
  * 
  * Each object in the passwordList gives a password policy and then the password.
- * The times field says the minimal and maximal amount of times the letter should be in the password. So 1-3 means at least 1 time, at most 3 times.
+ * The times field says the minimal and maximal amount of times the letter should be in the password. 
+ * So 1-3 means at least 1 time, at most 3 times.
  * The letter field gives which letter should be counted
  * The password field gives the password
  * 
@@ -20,4 +21,18 @@ const passwordList = [
     { times: '1-3', letter: 'a', password: 'abcde'},
     { times: '1-3', letter: 'b', password: 'cdefg'},
     { times: '2-9', letter: 'c', password: 'ccccccccc'}
-];
+];
+
+passwordList.forEach(passwordPolicy =>{
+  let count = 0;
+  for(let i=0; i<passwordPolicy.password.length; i++){
+  if(passwordPolicy.password[i] === passwordPolicy.letter) {
+    count +=1;
+  }
+}
+  if(count >= parseInt(passwordPolicy.times[0]) && count <= parseInt(passwordPolicy.times[2])){
+    console.log(`${passwordPolicy.password} is VALID, ${passwordPolicy.letter} is present ${count} times and should have been present at least ${parseInt(passwordPolicy.times[0])} and at most ${parseInt(passwordPolicy.times[2])} times`);
+  } else{
+    console.log(`${passwordPolicy.password} is INVALID, ${passwordPolicy.letter} is present ${count} times and should have been present at least ${parseInt(passwordPolicy.times[0])} and at most ${parseInt(passwordPolicy.times[2])} times`);
+  }
+})
diff --git a/Week3/challenges/4-bank-account.js b/Week3/challenges/4-bank-account.js
@@ -27,11 +27,28 @@ const bankAccount = {
   ],
 };
 
+const updateBankAccount = (amount, reason) => {
+  bankAccount.currentBalance = bankAccount.currentBalance - amount;
+    bankAccount.transactions.push({prevAmount: bankAccount.currentBalance + amount, 
+      newAmount: bankAccount.currentBalance,
+      reason: reason});
+};
+
 const donateMoney = (amount, onSuccess, onFail) => {
-  // TODO complete this function
+  if(bankAccount.currentBalance>amount){
+    onSuccess();
+    updateBankAccount(amount, reason = 'Donation');
+  } else{
+    onFail();
+  }
 };
 const payRent = (amount, onSuccess, onFail) => {
-  // TODO complete this function
+  if(bankAccount.currentBalance>amount){
+    onSuccess();
+    updateBankAccount(amount, reason = 'Rent');
+  } else{
+    onFail();
+  }
 };
 
 /**
