Solutions

src/films.js

@@ -1,46 +1,102 @@
 // Exercise 1: Get the array of all directors.
-function getAllDirectors(array) {
-  let result =  ???;
-  console.log("EXERCICE 1 ->", result);
-  return result;
+function getAllDirectors(movies) { 
+
+  let result = movies.map (movie => movie.director);
+  //console.log("EXERCICE 1 ->", result);
+  return result; 
 }
 
 // Exercise 2: Get the films of a certain director
-function getMoviesFromDirector(array, director) {
-
+function getMoviesFromDirector(movies, director) {
+
+  let result = movies.filter (movie => movie.director == director);
+  //console.log("EXERCICE 2 ->", result);
+  return result; 
 }
 
 // Exercise 3: Calculate the average of the films of a given director.
-function moviesAverageOfDirector(array, director) {
-
+
+function average(movies){
+  let scores = movies.map(movie => movie.score);
+  let averageScores = (scores.reduce((a, b) => a + b) / scores.length).toFixed(2);
+  //console.log("EXERCICE 3 ->", averageScores);
+  return parseFloat(averageScores);
+}
+
+function moviesAverageOfDirector(movies, director) {
+
+  let moviesDirector = movies.filter(movie => movie.director == director);
+  let result = average(moviesDirector);
+  return result;
 }
 
 // Exercise 4:  Alphabetic order by title 
-function orderAlphabetically(array) {
-
+function orderAlphabetically(movies) {
+
+  let allMovies = movies.map(movie => movie.title);
+  let moviesSort = allMovies.sort().slice(0, 20);
+  //console.log("EXERCICE 4 ->", moviesSort);
+  return moviesSort;
 }
 
 // Exercise 5: Order by year, ascending
-function orderByYear() {
+function orderByYear(movies) {
 
+  let moviesByYear =  [...movies].sort((a,b) => {
+    if (a.year > b.year) {return 1;}
+    if (a.year < b.year) {return -1;}
+    if (a.title.toLowerCase() > b.title.toLowerCase()) {return 1;}
+    if (a.title.toLowerCase() < b.title.toLowerCase()) {return -1;}
+    return 0;
+})
+  //console.log("EXERCICE 5 ->", moviesByYear);
+  return moviesByYear;
 }
 
 // Exercise 6: Calculate the average of the movies in a category
-function moviesAverageByCategory() {
 
-}
+function moviesAverageByCategory(movies, genre) {
+
+  let moviesGenre = movies.filter(movie => movie.genre == genre && movie.score !=="");
+  let result = average(moviesGenre);
+  return result;
+  }
 
 // Exercise 7: Modify the duration of movies to minutes
-function hoursToMinutes() {
 
-}
+function hoursToMinutes(movies) {
 
-// Exercise 8: Get the best film of a year
-function bestFilmOfYear() {
+  let movieDuration = movies.map((movie) => {
+  let duration = movie.duration;
+  let realMin;
+
+  let hours = parseInt(duration.slice(0, 1) * 60);
+  let minutes = parseInt(duration.slice(2, -3));
+  minutes >= 0 ? (realMin = minutes) : (realMin = 0);
 
-}
+  let durationInMin = {
+      duration: parseInt(hours + realMin)
+    };
+    return durationInMin;
+  });
+  //console.log('EXERCICE 7 ->', movieDuration);
+  return movieDuration;
+}   
 
 
+// Exercise 8: Get the best film of a year
+
+function bestFilmOfYear(movies, year) {
+  let filmByYears = movies.filter(movie => movie.year == year)
+  filmByYears.sort((a,b) => {
+    if (a.year > b.year) {return -1;}
+    if (a.year < b.year) {return 1;}
+    return 0;
+  })
+  let bestFilm = filmByYears.splice(0,1);
+  //console.log("EXERCICE 8 ->", bestFilm);
+  return bestFilm;
+}
 
 // The following is required to make unit tests work.
 /* Environment setup. Do not modify the below code. */