fix: added lesson7 answers for Hummad

Author: htanweer244

lesson_07/conditionals/src/lesson7.ts

@@ -7,7 +7,8 @@ import { computeLexicographicDistance } from "./util.js";
  * @return True if the age corresponds to a voting age and false otherwise.
  */
 export function canVote(age: number): boolean {
-  return false;
+  if (age < 18) return false;
+  else return true;
 }
 
 /**
@@ -17,14 +18,14 @@ export function canVote(age: number): boolean {
  * @param b The second `string` to compare.
  * @return -1 if a is less than b, 1 if a is greater than b, and 0 otherwise.
  */
-export function compareStrings(a: string, b: string): number {
+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);
-
+  if (distance < 0) return -1;
+  else if (distance > 0) return 1;
+  else return 0;
   // TODO(you): Finish this method.
-
-  return 0;
 }
 
 /**
@@ -37,7 +38,27 @@ export function compareStrings(a: string, b: string): number {
  * @return The letter grade ("A+", "A", "A-", "B+", etc.).
  */
 export function convertGpaToLetterGrade(gpa: number): string {
-  return "F";
+  if (gpa >= 4.0) {
+    return "A";
+  } else if (gpa >= 3.7) {
+    return "A-";
+  } else if (gpa >= 3.3) {
+    return "B+";
+  } else if (gpa >= 3.0) {
+    return "B";
+  } else if (gpa >= 2.7) {
+    return "B-";
+  } else if (gpa >= 2.3) {
+    return "C+";
+  } else if (gpa >= 2.0) {
+    return "C";
+  } else if (gpa >= 1.7) {
+    return "C-";
+  } else if (gpa >= 1.3) {
+    return "D+";
+  } else if (gpa >= 1.0) {
+    return "D";
+  } else return "F";
 }
 
 /**
@@ -47,7 +68,12 @@ export function convertGpaToLetterGrade(gpa: number): string {
  * @return The factorial of n.
  */
 export function computeFactorial(n: number): number {
-  return 0;
+  let result = 1;
+  for (let i = 1; i <= n; i++) {
+    result *= i;
+  }
+
+  return result;
 }
 
 /**
@@ -56,8 +82,13 @@ export function computeFactorial(n: number): number {
  * @param values The values to sum.
  * @return The sum of all the values.
  */
+
 export function addNumbers(values: number[]): number {
-  return 0;
+  let sum = 0;
+  for (const value of values) {
+    sum = sum + value;
+  }
+  return sum;
 }
 
 /**
@@ -66,8 +97,20 @@ export function addNumbers(values: number[]): number {
  * @param n The first `n` of Fibonacci values to compute.
  * @return An array containing the first `n` Fibonacci values.
  */
+
 export function getFirstNFibonacciNumbers(n: number): number[] {
-  return [];
+  //return [];
+  if (n <= 0) return [];
+  if (n === 1) return [1];
+
+  const fibonacci: number[] = [1, 1];
+
+  for (let i = 2; i < n; i++) {
+    const numberFibonacci = fibonacci[i - 1] + fibonacci[i - 2];
+    fibonacci.push(numberFibonacci);
+  }
+
+  return fibonacci;
 }
 
 /**
@@ -92,11 +135,18 @@ export function binarySearch(
 
   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);
+  }
+
   // 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;
 }