feat: implements lesson 07 conditional functions and Part C homework

lesson_07/conditionals/.env.test

@@ -1 +1 @@
-HW_VERSION=your homework version here
+HW_VERSION=C

lesson_07/conditionals/src/lesson7.ts

@@ -13,8 +13,13 @@ export function compareStrings(a: string, b: string): number {
   const distance = computeLexicographicDistance(a, b);
 
   // TODO(you): Finish this method.
-
-  return 0;
+  if (distance < 0) {
+    return -1;
+  } else if (distance > 0) {
+    return 1;
+  } else {
+    return 0;
+  }
 }
 
 /**
@@ -24,7 +29,13 @@ export function compareStrings(a: string, b: string): number {
  * @return The factorial of n.
  */
 export function computeFactorial(n: number): number {
-  return 0;
+  if (n < 0) {
+    return 0; // Handle negative numbers
+  }
+  if (n <= 1) {
+    return 1;
+  }
+  return n * computeFactorial(n - 1);
 }
 
 /**
@@ -34,7 +45,21 @@ export function computeFactorial(n: number): number {
  * @return An array containing the first `n` Fibonacci values.
  */
 export function getFirstNFibonacciNumbers(n: number): number[] {
-  return [];
+  if (n <= 0) {
+    return [];
+  }
+  if (n === 1) {
+    return [1];
+  }
+  if (n === 2) {
+    return [1, 1];
+  }
+
+  const result = [1, 1];
+  for (let i = 2; i < n; i++) {
+    result.push(result[i - 1] + result[i - 2]);
+  }
+  return result;
 }
 
 /**
@@ -62,8 +87,16 @@ export function binarySearch(
   // TODO(you): Finish implementing this algorithm
 
   // If values[pivotIndex] is equal to value then return `pivotIndex`.
+  if (values[pivotIndex] === value) {
+    return pivotIndex;
+  }
   // Else if values[pivotIndex] is greater than the value, then
   // call `binarySearch(values, start, pivotIndex - 1, value)` and return its value;
+  else if (values[pivotIndex] > value) {
+    return binarySearch(values, start, pivotIndex - 1, value);
+  }
   // Else call `binarySearch(values, pivotIndex + 1, end, value)` and return its value.
-  return -1;
+  else {
+    return binarySearch(values, pivotIndex + 1, end, value);
+  }
 }

lesson_07/conditionals/src/part_c.ts

@@ -6,7 +6,26 @@
  * @returns
  */
 export function isStrongPassword(password: string): boolean {
-  return false;
+  // Check if password has at least 8 characters
+  if (password.length < 8) {
+    return false;
+  }
+
+  // Check if password has at least one uppercase letter
+  let hasUppercase = false;
+  // Check if password has at least one digit
+  let hasDigit = false;
+
+  for (const char of password) {
+    if (char >= 'A' && char <= 'Z') {
+      hasUppercase = true;
+    }
+    if (char >= '0' && char <= '9') {
+      hasDigit = true;
+    }
+  }
+
+  return hasUppercase && hasDigit;
 }
 
 /**
@@ -16,7 +35,24 @@ export function isStrongPassword(password: string): boolean {
  * @returns
  */
 export function getDayOfWeek(day: number): string {
-  return "";
+  switch (day) {
+    case 0:
+      return "Sunday";
+    case 1:
+      return "Monday";
+    case 2:
+      return "Tuesday";
+    case 3:
+      return "Wednesday";
+    case 4:
+      return "Thursday";
+    case 5:
+      return "Friday";
+    case 6:
+      return "Saturday";
+    default:
+      return "";
+  }
 }
 
 /**
@@ -31,5 +67,14 @@ export function getDayOfWeek(day: number): string {
  * @returns
  */
 export function getTicketPrice(age: number): number {
-  return 0;
+  if (age < 5) {
+    return 0; // Free for children under 5
+  } else if (age >= 5 && age <= 17) {
+    return 10; // Children between 5 and 17
+  } else if (age >= 18 && age <= 59) {
+    return 20; // Adults between 18 and 59
+  } else if (age >= 60) {
+    return 15; // Seniors 60 and older
+  }
+  return 0; // Default case (shouldn't reach here)
 }