Scala

1. Content-based recommendation system on on the Amazon dataset having five attributes for each item - Title, Group, Sales rank, Average rating, and Categories
2. Alternating least squares (ALS) algorithm from MLlib package in Apache Spark. ALS solves the matrix factorization problems.
3. Movie recommendation using ALS. Movielens100k dataset, which is a set of 100,000 data points related to ratings given by a set of users to a set of movies. The dataset consists of user ID, movie ID, rating, and timestamp fields.