done

src/movies.ts

@@ -55,7 +55,7 @@ const movies: Movie[] = [
 function hasKey(obj: object, key: string): boolean {
   // write your code here...
 
-  return true; // replace true with what you see is fit
+  return key in obj; // replace true with what you see is fit
 }
 
 /**
@@ -65,8 +65,10 @@ function hasKey(obj: object, key: string): boolean {
  */
 function printMovieTitles(movies: Movie[]): void {
   // write your code here...
+  movies.forEach((movie) => {
+    console.log(movie.title);
+  });
 }
-
 /**
  * `countMoviesByYear` function that:
  * - Accepts two parameters:
@@ -81,7 +83,13 @@ function printMovieTitles(movies: Movie[]): void {
 function countMoviesByYear(movies: Movie[], year: number): number {
   // write your code here...
 
-  return -1; // replace -1 with what you see is fit
+  let count = 0;
+  for (const movie of movies) {
+    if (movie.year === year) {
+      count++;
+    }
+  }
+  return count;
 }
 
 /**
@@ -110,7 +118,11 @@ function updateMovieGenre(
 ): Movie[] {
   // write your code here...
 
-  return []; // replace empty array with what you see is fit
-}
+  const movie = movies.find((movie) => movie.title === title);
+  if (movie) {
+    movie.genre = newGenre;
+  }
+  return movies;
+} //q replace empty array with what you see is fit
 
 export { Movie, hasKey, printMovieTitles, countMoviesByYear, updateMovieGenre };