Introduction to newLISP

A PDF version is available. (info)

Welcome to this introduction to newLISP! You'll find newLISP easy to learn and powerful, combining some of the power and elegance of classic LISP with the facilities of a modern scripting language, such as regular expressions, network functions, Unicode support, multitasking, and many others.

This book is a straightforward and simple description of the basics of the language. You should be familiar with using a text editor, and ideally you'll have done a bit of scripting before, but previous programming experience or knowledge of LISP isn't required. I hope it's enough to get you started, and ready to start exploring the real power of newLISP.

I'm writing this on a MacOS X system, but it shouldn't make any difference if you're using Linux, Windows, or one of the many other platforms that newLISP supports. The examples are designed to be run in newLISP version 10.

This is an unofficial document—for the official and definitive description of newLISP refer to the excellent reference manual that is installed with the software.

Outline

A printable version of Introduction to newLISP is available. (edit it)

The basics: Getting started with newLISP; lists, symbols, evaluation, quoting

Controlling the flow: Tests, loops, blocks, local symbols, functions

Lists: Everything you need to know about lists

Strings: Strings

Apply and map: Applying and mapping functions

Contexts: Introducing newLISP's contexts

Macros: Controlling evaluation with macros

Working with numbers: Numeric and arithmetic tips and examples

Working with dates and times: About newLISP's date and time related functions

Working with files: Interfacing with the file system

Multitasking: Threads, processes, multitasking

Working with XML: Some tips on working with XML data

The debugger: newLISP's built-in debugger

The Internet: Reaching out with newLISP's built-in network functions

More examples: Some more example code

Graphical interface: A quick look at the graphical toolkit

Resources

the main newLISP web site, newlisp.org, which provides a helpful forum, code examples and documentation, and the latest newLISP software
John Small's excellent 21 minute introduction, newLISP in 21 minutes, at newLISP in 21 minutes
the fine newLISP dragonfly logo, fashioned from 11 pairs of parentheses, is designed by Brian Grayless (fudnik.com)

Thanks to everyone who has contributed to earlier versions of this document, by suggesting additions or finding errors. Keep them coming.