Code-Beispiel für einen content-basierten Empfehlungsalgorithmus in JavaScript

Author: Sascha-Block

Algorithmen Design/content-basedFilteringAlgorithm.js

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+// Sample data for content-based filtering
+const movies = [
+    {
+        title: "The Dark Knight",
+        genre: "Action",
+        rating: 9.0,
+        director: "Christopher Nolan"
+    },
+    {
+        title: "Inception",
+        genre: "Thriller",
+        rating: 8.8,
+        director: "Christopher Nolan"
+    },
+    {
+        title: "The Godfather",
+        genre: "Crime",
+        rating: 9.2,
+        director: "Francis Ford Coppola"
+    },
+    {
+        title: "The Shawshank Redemption",
+        genre: "Drama",
+        rating: 9.3,
+        director: "Frank Darabont"
+    }
+];
+
+// Define the user's preferences
+const userPreferences = {
+    genre: "Action",
+    director: "Christopher Nolan"
+};
+
+// Define a function to compute the similarity between movies
+function similarity(movie, userPreferences) {
+    let similarityScore = 0;
+    if (movie.genre === userPreferences.genre) {
+        similarityScore += 1;
+    }
+    if (movie.director === userPreferences.director) {
+        similarityScore += 1;
+    }
+    return similarityScore;
+}
+
+// Implement the content-based filtering algorithm
+function contentBasedFiltering(movies, userPreferences) {
+    // Compute the similarity between each movie and the user's preferences
+    const similarityScores = movies.map(movie => {
+        return {
+            movie: movie,
+            score: similarity(movie, userPreferences)
+        };
+    });
+
+    // Sort the movies by similarity score in descending order
+    const sortedMovies = similarityScores.sort((a, b) => {
+        return b.score - a.score;
+    });
+
+    // Return the top 3 movies with the highest similarity score
+    return sortedMovies.slice(0, 3).map(movie => movie.movie.title);
+}
+
+// Test the content-based filtering algorithm
+const recommendedMovies = contentBasedFiltering(movies, userPreferences);
+console.log(recommendedMovies); // Output: ["The Dark Knight", "Inception"]