Learn Red by Balbaert, Ivo -- Read -- Imperial Library of Trantor

Index

Title Page Copyright and Credits

Learn Red – Fundamentals of Red

Dedication Packt Upsell

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Foreword Contributors

About the author About the reviewer Packt is searching for authors like you

Preface

Who this book is for What this book covers To get the most out of this book

Download the example code files Conventions used

Get in touch

Reviews

Red's Mission

Technical requirements A short history of Red

What Red stands for Some history

What makes Red special?

A full-stack language – from the metal to the meta Code is data and data is code Data types built in Small toolchain and executables Dialects

Red's main features

Portability Like a Swiss Army knife

Summary Questions

Setting Up for Development

Technical requirements Installing Red

Installing Red on Windows Installing Red on Linux and macOS A look at the source code

Working interactively in the Red console Running and compiling your first script

Executing a script in the Red console Compiling a script to an executable

Development mode Release mode

Other compilation options Red's compilation model Development environments for writing Red

Simple text editors More sophisticated editors

Summary Questions

Using Words, Values, and Types

Technical requirements Understanding words and values Some common datatypes Using blocks and parens

Comments

Word bindings

Inferring types Assigning and copying Working with words

More about types

Converting types The type system

Evaluating expressions and blocks

Some basic operations

Working with Boolean values Working with numbers Making random objects

Order of evaluation Evaluation with do and reduce

The structure of a Red program Summary Questions Further reading

Code-Controlling Structures

Technical requirements Getting input from the user – input and ask Testing conditions

if unless either Stopping a program – halt or quit switch and case catch and throw

Structuring repetitions

Repeating a number of times – loop or repeat Repeating with a condition – while or until

A number-guessing game Handling errors

attempt and try Using error?

Creating and catching errors

Checking types

Summary Questions

Working with Series and Blocks

Technical requirements Series and blocks Navigating and looping through a series

A step at a time – head, tail, index?, and next Looping through a series – foreach and forall

Getting information from a series

Selecting an item – pick and / Searching for an item – select and find

Sorting

Changing a series

Changing items – poke, replace, and change Adding new items – append, repend, and insert

append repend insert

Deleting items – remove and take Moving items – move and swap Series as sets

Copying a series Strings as series

Splitting a string – split Turning a series into a string – form Rejoining a block – rejoin Clearing part of a string – clear and trim Adding to a string – append and insert Other useful tricks

Summary Questions

Using Functions and Objects

Technical requirements A fauna of functions

The do word The does word The has word The func word The function word Copying a local series

Function attributes

Passing arguments Typing arguments Return values – return and exit Refinements Code style and documentation strings

Working with functions

Error handling Recursive functions Importing functions with do

Code is data and data is code

Using reflection on functions

The source word The body-of function Changing the header and body of a function through code

Code is just data – load

Using objects

The make word Working with objects

Creating objects Working with fields and functions Copying objects and inheritance Looking inside an object

Summary Questions

Working with Files

Technical requirements Selecting a file or folder Working with file paths and directories Reading and writing data files

Working with binary files

The image! datatype

Downloading a file from the internet

Loading and saving files

Saving and loading the console history

Downloading currency exchange rates

Using query string parameters

Summary Questions

Parsing Data

Technical requirements The bitset! datatype Understanding how parse works

First parse examples Using some and any Matching positions Choosing with |

Searching, extracting, and changing

Working with variables – to, thru, and copy Executing code on a match Changing data – change, remove, and insert

More features and examples

Using end Building special languages Changing a rule on the fly Parsing blocks and code Debugging parse

Summary Questions

Composing Visual Interfaces

Technical requirements Structuring an interface

First example – a screen for downloading exchange rates

Running the example Examining the code Building a layout Faces and actions Two-way binding

Container settings – view

Changing an app's icon View's refinements Using do in view

Layout commands

A faces walkthrough

Base, box, and image Text faces – h1, text, field, and area Button, check, and radio List faces – text-list, drop-list, and drop-down Panel, group-box, and tab-panel Progress bar and slider Styles

Events and actors

Multiple events Timer event Actors are objects Detecting the keyboard Menus

Basic contacts app An introduction to the draw dialect Summary Questions Further reading

Advanced Red

Technical requirements Reactive programming Red/System

Comparing Red and Red/System Calling a Red/System script from within Red

Interacting with the operating system

Getting input from command-line arguments Calling an external program – call Using the OS clipboard – read-clipboard

Datatypes for performance

The vector! datatype The map! and hash! datatypes

Embedded Red and macros

Embedded Red Macros

Red for smart contract programming

Red/C3 Using Red for writing dapps

Red's roadmap Some useful references Summary Questions Further reading

Assessments Other Books You May Enjoy

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