src/model/course-search/SortByDifficulty.java


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package design.model;

import CourseSorter;

public class SortByDifficulty implements CourseSorter {
    sortCourses(List<Course> courses)
    {
        courses.sort(courses, (Course c1, Course c2) -> (c1.getDifficultyRating > c2.getDifficultyRating));
    }
}