Book Image

Learn Red ? Fundamentals of Red

By : Ivo Balbaert
Book Image

Learn Red ? Fundamentals of Red

By: Ivo Balbaert

Overview of this book

A key problem of software development today is software bloat, where huge toolchains and development environments are needed in software coding and deployment. Red significantly reduces this bloat by offering a minimalist but complete toolchain. This is the first introductory book about it, and it will get you up and running with Red as quickly as possible. This book shows you how to write effective functions, reduce code redundancies, and improve code reuse. It will be helpful for new programmers who are starting out with Red to explore its wide and ever-growing package ecosystem and also for experienced developers who want to add Red to their skill set. The book presents the fundamentals of programming in Red and in-depth informative examples using a step-by-step approach. You will be taken through concepts and examples such as doing simple metaprogramming, functions, collections, GUI applications, and more. By the end of the book, you will be fully equipped to start your own projects in Red.
Table of Contents (13 chapters)

More about types

Sometimes, converting a data value from one type to another is needed in programming, so here we see how to do that in Red. We also get more insight into how all Red types are connected together.

Converting types

A type determines the operations you can perform on its values; for example, adding strings doesn't exist in Red:

;-- see Chapter03/
"12" + "34"
*** Script Error: + does not allow string! for its value1 argument
*** Where: +

If what we really meant was adding two integers, then we must first convert the strings to integers with to-integer:

(to-integer "12") + (to-integer "34")  ; == 46

What happens if you remove the first pair of parentheses...