feat: created new branch and completed lesson

lesson_07/conditionals/.env.test

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

lesson_07/conditionals/src/lesson7.ts

@@ -11,11 +11,12 @@ export function compareStrings(a: string, b: string): number {
   // The distance will be a number less than 0 if string `a` is lexicographically less than `b`, 1
   // if it is greater, and 0 if the strings are equal.
   const distance = computeLexicographicDistance(a, b);
+  return distance;
+}
 
-  // TODO(you): Finish this method.
+// TODO(you): Finish this method.
 
-  return 0;
-}
+// Removed misplaced return statement
 
 /**
  * Computes the factorial of the given value of `n`.
@@ -24,7 +25,20 @@ 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;
+  }
+  if (n === 1) {
+    return 1;
+  }
+  if (n === 2) {
+    return 2;
+  }
+  let result = 1;
+  for (let i = 2; i <= n; ++i) {
+    result *= i;
+  }
+  return result;
 }
 
 /**
@@ -34,7 +48,20 @@ export function computeFactorial(n: number): number {
  * @return An array containing the first `n` Fibonacci values.
  */
 export function getFirstNFibonacciNumbers(n: number): number[] {
-  return [];
+  if (n < 1) {
+    return [];
+  }
+  if (n === 1) {
+    return [1];
+  }
+  if (n === 2) {
+    return [1, 1];
+  }
+  const sequence = [1, 1];
+  for (let i = 2; i < n; ++i) {
+    sequence[i] = sequence[i - 1] + sequence[i - 2];
+  }
+  return sequence;
 }
 
 /**
@@ -56,14 +83,19 @@ export function binarySearch(
     // The range is not valid so just return -1.
     return -1;
   }
-
-  const pivotIndex = Math.floor((start + end) / 2); // The index in the middle of the array.
-
   // TODO(you): Finish implementing this algorithm
 
   // If values[pivotIndex] is equal to value then return `pivotIndex`.
   // Else if values[pivotIndex] is greater than the value, then
   // call `binarySearch(values, start, pivotIndex - 1, value)` and return its value;
   // Else call `binarySearch(values, pivotIndex + 1, end, value)` and return its value.
-  return -1;
+
+  const pivotIndex = Math.floor((start + end) / 2); // The index in the middle of the array.
+  if (values[pivotIndex] === value) {
+    return pivotIndex;
+  } else if (values[pivotIndex] > value) {
+    return binarySearch(values, start, pivotIndex - 1, value);
+  } else {
+    return binarySearch(values, pivotIndex + 1, end, value);
+  }
 }

lesson_07/conditionals/src/part_b.ts

@@ -5,7 +5,15 @@
  * @returns
  */
 export function isLeapYear(year: number): boolean {
-  return false;
+  if (year % 400 === 0) {
+    return true;
+  } else if (year % 100 === 0) {
+    return false;
+  } else if (year % 4 === 0) {
+    return true;
+  } else {
+    return false;
+  }
 }
 
 /**
@@ -15,7 +23,11 @@ export function isLeapYear(year: number): boolean {
  * @returns
  */
 export function isEvenOrOdd(num: number): string {
-  return "";
+  if (num % 2 === 0) {
+    return "even";
+  } else {
+    return "odd";
+  }
 }
 
 /**
@@ -25,5 +37,22 @@ export function isEvenOrOdd(num: number): string {
  * @returns
  */
 export function hasVowel(word: string): boolean {
-  return false;
+  const lowerCaseword = word.toLowerCase();
+  if (lowerCaseword.includes("a")) {
+    return true;
+  }
+  if (lowerCaseword.includes("e")) {
+    return true;
+  }
+  if (lowerCaseword.includes("i")) {
+    return true;
+  }
+  if (lowerCaseword.includes("o")) {
+    return true;
+  }
+  if (lowerCaseword.includes("u")) {
+    return true;
+  } else {
+    return false;
+  }
 }