Functional design patterns

In this section, we are going to learn about the following functional design patterns:

• MapReduce
• Loan pattern
• Tail call optimization
• Memoization
• The execute around method

MapReduce

MapReduce is a technique used for massive parallel programming, developed by Google, which emerged as a functional design pattern because of the ease of expression. In functional programming, it is a form of a monad.

Intent

The intent is to break existing tasks into multiple smaller ones, run them in parallel, and aggregate the result (reduce). It is expected to...