REBOL™ TECHNOLOGIES REBOL/CORE USER GUIDE VERSION 2.3 SEPTEMBER 2000 REBOL™ Technologies, 301 South State Street, Ukiah, CA 95482 http://www.REBOL.com Copyright © 2000 REBOL Technologies All rights reserved. Printed in the United States of America No part of this publication may be stored in a retrieval system, transmitted, or reproduced in any way, including but not limited to photocopy, photographic, magnetic or other record, without the prior agreement and written permission of REBOL Technologies. Windows® is a registered trademark of Microsoft Corporation. REBOL and the REBOL logo are trademarks of REBOL Technologies. All other product names, marks, logos, and symbols may be trademarks or registered trademarks of their respective owners. We would like to thank the following individuals for their contributions in the production of this manual: Carl Sassenrath Barbara Ramsey Erin Thomas Scott Allen Jennifer Nelson Dan Ramsey Cynthia Sassenrath Dan Stevens Dave Turner Jessica Johnson Mitch Rodgers Andrew Morton 09292000 Contents Introduction About REBOL/Core . xxii About this Guide . xxii Additional Documentation . xxiii Document Conventions . xxiii Contacting REBOL Technical Support . xxiii REBOL Welcomes Your Comments . xxiv Chapter 1. Operation Installing REBOL . 1-2 Distribution Files . 1-2 Network Setup . 1-2 Proxy and Firewall Settings . 1-3 License Agreement . 1-4 Starting REBOL . 1-4 From an Icon . 1-4 From a Shell . 1-5 From Another Application . 1-5 Security Issues . 1-5 Program Arguments . 1-9 Script File . .1-10 Specifying Options . .1-10 File Redirection . .1-12 Script Arguments . .1-12 iii Startup Files . 1-13 Quitting REBOL . 1-14 Using the Console . 1-14 Mulitple Line Input . 1-15 Interrupting a Script . 1-16 History Recall . 1-16 Word Completion . 1-16 Busy Indicator . 1-17 Network Connections . 1-17 Virtual Terminal . 1-17 Getting Help . 1-18 Online Help . 1-18 Viewing Source Code . 1-22 Download Documents . 1-23 Script Library . 1-23 User Mailing List . 1-23 Contacting Us . 1-23 Errors . 1-25 Error Messages . 1-25 Redirecting Errors . 1-26 Upgrading . 1-26 Chapter 2. Quick Tour Overview . 2-2 Values . 2-2 Numbers . 2-2 Times . 2-2 Dates . 2-3 Money . 2-3 Tuples . 2-3 iv Strings . 2-4 Tags . 2-4 Email Addresses . 2-4 URLs . 2-5 Filenames . 2-5 Pairs . 2-5 Issues . 2-6 Binary . 2-6 Words . 2-6 Blocks . 2-7 Variables . 2-9 Evaluation . 2-10 Functions . 2-12 Paths . 2-13 Objects . 2-15 Scripts . 2-16 Files . 2-17 Networking . 2-19 HTTP . .2-19 FTP . .2-20 SMTP . .2-20 POP . .2-20 NNTP . .2-21 Daytime . .2-21 Whois . .2-21 Finger.