Explore the fundamental principle of composition in functional programming through this conference talk from NDC Oslo 2020. Discover how composition differs from object-oriented approaches and learn practical applications. Begin with an introduction to basic functional programming concepts before delving into various methods of building complex structures from simpler components. Witness real-world applications of composition, starting with a straightforward FizzBuzz example and progressing to the development of a complete, object-free web application. Gain valuable insights into functional programming techniques and their practical implementation in software development.