September 2017
Intermediate to advanced
432 pages
8h 20m
English
Content preview from Clean Architecture: A Craftsman's Guide to Software Structure and Design
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6FUNCTIONAL PROGRAMMING
In many ways, the concepts of functional programming predate programming itself. This paradigm is strongly based on the l-calculus invented by Alonzo Church in the 1930s.
SQUARES OF INTEGERS
To explain what functional programming is, it’s best to examine some examples. Let’s investigate a simple problem: printing the squares of the first 25 integers.
In a language like Java, we might write the following:
public class Squint { public static void main(String args[]) { for (int i=0; i<25; i++) System.out.println(i*i); } }
In a language like Clojure, which is a derivative of Lisp, ...
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