Feat/lesson07/condition and loops Wayleom Vargas

lesson_07/conditionals/.env.test

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

lesson_07/conditionals/src/lesson7.ts

@@ -11,10 +11,8 @@ 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);
-
   // TODO(you): Finish this method.
-
-  return 0;
+  return distance < 0 ? -1 : distance > 0 ? 1 : 0;
 }
 
 /**
@@ -24,7 +22,16 @@ export function compareStrings(a: string, b: string): number {
  * @return The factorial of n.
  */
 export function computeFactorial(n: number): number {
-  return 0;
+  // TODO(you): Finish this method.
+  if (n < 0) {
+    return 0; 
+  }
+
+  let answer = 1;
+  for (let i = 1; i <= n; i++) {
+    answer *= i;
+  }
+  return answer;
 }
 
 /**
@@ -34,7 +41,17 @@ 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 fibonacci: number[] = [1, 1];
+
+  for (let i = 2; i < n; i++) {
+    fibonacci[i] = fibonacci[i - 1] + fibonacci[i - 2];
+  }
+
+  return fibonacci;
 }
 
 /**
@@ -65,5 +82,11 @@ export function binarySearch(
   // 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;
+  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_e.ts

@@ -6,7 +6,10 @@
  * @returns
  */
 export function isUppercase(char: string): boolean {
-  return false;
+  if (char.length !== 1) {
+    return false; 
+  }
+  return char === char.toUpperCase() && char !== char.toLowerCase();
 }
 
 /**
@@ -17,7 +20,12 @@ export function isUppercase(char: string): boolean {
  * @returns
  */
 export function canGetDriverLicense(age: number, passedTest: boolean): boolean {
-  return false;
+  if (age >= 18 && passedTest) {
+    return true;
+  }
+  else{
+    return false;
+  }
 }
 
 /**
@@ -29,5 +37,9 @@ export function canGetDriverLicense(age: number, passedTest: boolean): boolean {
  * @returns
  */
 export function isStoreOpen(day: string, hour: number): boolean {
-  return false;
+  if (day === "Sunday") {
+    return false;
+  }
+  return hour > 9 && hour < 21;
 }
+