The Hacker's Diet How to lose weight and hair through stress and poor nutrition By John Walker

The Hacker's Diet , notwithstanding its silly subtitle, is a serious book about how to lose weight and permanently maintain whatever weight you desire. It treats dieting and weight control from an engineering and management standpoint, and provides the tools and an understanding of why they work and how to use them that permit the reader to gain control of their own weight. The book is intended primarily for busy, successful engineers, programmers, and managers who have struggled unsuccessfully in the past to lose weight and avoid re-gaining it. Computer-based tools and experiments in Microsoft Excel or the Palm Computing Platform are available, as well as an online Web application, but a computer is not necessary to use the techniques described in the book; paper and pencil alternatives are provided.

The Fourth Edition of The Hacker's Diet was released in November 2005. It is essentially identical in content with the previous editions, but has been extensively re-formatted to improve appearance, accessibility, ease of navigation, and standards compliance. The Fourth Edition strictly complies with the XHTML 1.0 (Transitional and Frameset) and CSS 2.1 standards and requires a browser which implements these standards. (As of the release of this edition, current versions of all of the most popular browsers, including Mozilla Firefox, Opera, and Microsoft Internet Explorer supported these standards sufficiently to display the book without problems.) In addition, the browser and operating system must display Unicode character entities. JavaScript and DOM/DHTML are used in the navigation bar, but if they're absent or disabled, everything will still work. If your browser and/or system cannot handle this version, the Third Edition (Frames) or the No-Frame editions, both of which date from 1994, will almost certainly work. The content is the same; only the presentation is more rudimentary.



The EPUB edition is in the open document format compatible with the iBooks application on the Apple iPad, iPhone, and iPod touch; Sony Reader; Barnes and Noble Nook; and a variety of other electronic book devices and mobile platforms. EPUB books may be opened directly with a Web browser using the EPUBReader add-on for Firefox or the eBook Reader widget for Opera, although users of desktop and notebook computers with Internet connectivity will probably prefer the Web edition, due to its more flexible navigation options.

If your Web browser has an EPUB-compatible plug-in installed, you can open the book simply by clicking on the The Hacker's Diet EPUB Edition link. Otherwise, use your browser's idiom to download the abovementioned file to your computer and then transfer it to your reading device according to the manufacturer's directions. For the iPad and iPhone (etc.), just drag the downloaded hackdiet.epub file to iTunes, where you should see it in the “Books” section. Then connect your reading device to the computer and the book should be transferred to it by the Sync process. If the book is not installed, make sure that you've enabled syncing books to that device, and that if you've opted not to sync all books in your library to the device, that The Hacker's Diet is checked to be copied. You must also, of course, have the Apple iBooks application installed on the device; if it's missing, go to the App Store and install it—it's free.

The Hacker's Diet EPUB edition contains no “Digital Rights Management” constraints: you are free to install it on as many devices as you wish, transfer it among them (if their hardware and software so permit), and pass on copies to others. It should be compatible with any EPUB reader hardware and software which can open standards-compliant unrestricted files.



Computer-based tools and experiments for Microsoft Excel and the Palm Computing Platform are available for downloading. A Web-based application, The Hacker's Diet Online, which can be used from any computer with Internet access and a Web browser, is available.

The Hacker's Diet Online This Web-based application allows you to maintain weight and exercise logs, produce custom charts, analyse trends, and plan diets from any computer with Internet connectivity and a Web browser. Data may be imported from and exported to other versions of the computer tools, or exported as CSV or XML for analysis with other programs. Microsoft Excel Versions compatible with a variety of Excel releases are available, all ZIPped archives of about 250 Kb. Palm Computing Platform An implementation of the Eat Watch nutrition and exercise log and analysis software for the Palm Computing Platform (PalmPilot, Palm, PalmOS, etc.), including desktop software for any platform with a standard C language environment which generates illustrated HTML logs from databases backed up from the handheld.

If you prefer to read the book off-line, you can download a PDF edition (1.3 Mb, ZIP compressed) which you can read with the Adobe Reader utility, available for most personal computers and Unix workstations, which may be downloaded free of charge directly from the Adobe Systems Web site. The PDF edition preserves all the formatting of the original book, and permits point-and-click navigation among chapters and to follow cross-references in the text.

Adobe is one of the most consistently irritating companies on Earth with which to do business. I'd like to give you a nice button for downloading your own copy of Adobe Reader, but they won't let me use the image without “registering” and “licensing” it, which I'm certainly not going to do in order to promote their product and its file format.



The Hacker's Diet was originally typeset using TeX with the LaTeX macro package. Camera-ready copy was generated from PostScript created by the dvips utility. The PostScript edition is a single monolithic file, almost 2.7 megabytes, containing the entire book as originally typeset. You can read it on-line with a PostScript viewing program such as GhostScript (which is free), or print it on any PostScript-compatible printer. Before sending this file to a printer, consider that the book is almost 250 pages long! This is a big print job, which will consume lots of paper, toner, and, potentially, good will of any colleagues with whom you share the printer. The PostScript edition may be downloaded as either a ZIPped archive or a gzip compressed Unix tar file; both are 702 Kb in length and uncompress to a 2.7 Mb PostScript file.

If your browser supports frames but isn't up to the demands of the Fourth Edition, the original 1994 Web edition with frames remains available. It allows navigation with a panel which lets you click chapter titles and go directly to that chapter. If, in addition, your browser supports JavaScript, simply moving the mouse over a footnote icon, like this one: will pop up a window containing the footnote. Moving the mouse over other footnotes displays them in the auxiliary window. Browsers without JavaScript (or users who have disabled JavaScript in their browsers) may display footnotes in the main document window by clicking the footnote icon, then use their browser's “Back” button to return to the main text.

Users with browsers which do not support frames, or those who prefer a more linear presentation in a single window, may access a no-frame edition of The Hacker's Diet with identical content to the frame-based book. The no-frame edition includes the pop-up footnotes present in the frame edition, but since few browsers which lack frames are likely to support JavaScript, you can simply click on the footnote icon to display it, then use the “Back” button or keystroke to return to the text containing the footnote.



by John Walker