1906 lines
49 KiB
HTML
1906 lines
49 KiB
HTML
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<!DOCTYPE HTML>
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<title>Space Tech · Learn Lisp The Hard Way</title>
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<meta name="generator" content="GitBook 3.2.3">
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<meta name="author" content=""the Phoeron" Colin J.E. Lupton">
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<link rel="next" href="3-20-00-neurotech.html" />
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<link rel="prev" href="3-18-00-robotics.html" />
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<body>
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<div class="book">
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<li class="header">LEARN LISP THE HARD WAY</li>
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<li class="chapter " data-level="1.1" data-path="./">
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CHANGELOG
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</a>
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</li>
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<li class="chapter " data-level="1.3" data-path="TODO.html">
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<a href="TODO.html">
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TODO
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</a>
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</li>
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<li class="header">PREFACE</li>
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<li class="chapter " data-level="2.1" data-path="preface.html">
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<a href="preface.html">
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TANSTAAFL
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</a>
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</li>
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<li class="chapter " data-level="2.2" data-path="preface-part-two.html">
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<a href="preface-part-two.html">
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The Hard Way is Easier
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</a>
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</li>
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<li class="chapter " data-level="2.3" data-path="preface-part-three.html">
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<a href="preface-part-three.html">
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Who Is This Book For?
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</a>
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</li>
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<li class="chapter " data-level="2.4" data-path="introduction.html">
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<a href="introduction.html">
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Lisp: A Future History
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</a>
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</li>
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<li class="chapter " data-level="2.5" data-path="acknowledgements.html">
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<a href="acknowledgements.html">
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Acknowledgements
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</a>
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</li>
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<li class="header">PART ONE</li>
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<li class="chapter " data-level="3.1" data-path="1-0-0-overview.html">
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<a href="1-0-0-overview.html">
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Grokking Lisp
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.1.1" data-path="1-01-00-lisp-bootcamp.html">
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<a href="1-01-00-lisp-bootcamp.html">
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Common Lisp Bootcamp
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.1.1.1" data-path="1-01-01-syntax-overview.html">
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<a href="1-01-01-syntax-overview.html">
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Syntax Overview in 5 Minutes
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</a>
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</li>
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<li class="chapter " data-level="3.1.1.2" data-path="1-01-02-repl.html">
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<a href="1-01-02-repl.html">
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The REPL
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</a>
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</li>
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<li class="chapter " data-level="3.1.1.3" data-path="1-01-03-expressions.html">
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<a href="1-01-03-expressions.html">
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Expressions, Parentheses, and Return Values
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</a>
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</li>
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<li class="chapter " data-level="3.1.1.4" data-path="1-01-04-lists-cons-cells.html">
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<a href="1-01-04-lists-cons-cells.html">
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Lists, Cons-Cells, and Memory
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</a>
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</li>
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<li class="chapter " data-level="3.1.1.5" data-path="1-01-05-symbols.html">
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<a href="1-01-05-symbols.html">
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Symbols and Namespaces
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</a>
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</li>
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<li class="chapter " data-level="3.1.1.6" data-path="1-01-06-prefix-notation.html">
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<a href="1-01-06-prefix-notation.html">
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Prefix Notation
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</a>
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</li>
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<li class="chapter " data-level="3.1.1.7" data-path="1-01-07-style-guide.html">
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<a href="1-01-07-style-guide.html">
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Common Lisp Style Guide
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</a>
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</li>
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<li class="chapter " data-level="3.1.1.8" data-path="1-01-08-configuration.html">
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<a href="1-01-08-configuration.html">
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Configuring Your Development Environment
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="3.1.2" data-path="1-02-00-input-output.html">
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<a href="1-02-00-input-output.html">
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Printing, Streams, and Strings
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.1.2.1" data-path="1-02-01-strings.html">
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<a href="1-02-01-strings.html">
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Strings
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</a>
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</li>
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<li class="chapter " data-level="3.1.2.2" data-path="1-02-02-more-strings.html">
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<a href="1-02-02-more-strings.html">
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More Strings
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</a>
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</li>
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<li class="chapter " data-level="3.1.2.3" data-path="1-02-03-unicode.html">
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<a href="1-02-03-unicode.html">
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Unicode and Strings
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</a>
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</li>
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<li class="chapter " data-level="3.1.2.4" data-path="1-02-04-chars.html">
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<a href="1-02-04-chars.html">
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Characters
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</a>
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</li>
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<li class="chapter " data-level="3.1.2.5" data-path="1-02-05-more-chars.html">
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<a href="1-02-05-more-chars.html">
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More Characters
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</a>
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</li>
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<li class="chapter " data-level="3.1.2.6" data-path="1-02-06-char-codes.html">
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<a href="1-02-06-char-codes.html">
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Character Codes
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</a>
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</li>
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<li class="chapter " data-level="3.1.2.7" data-path="1-02-07-strings-from-chars.html">
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<a href="1-02-07-strings-from-chars.html">
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Strings from Chars
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</a>
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</li>
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<li class="chapter " data-level="3.1.2.8" data-path="1-02-08-printing.html">
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<a href="1-02-08-printing.html">
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Printing
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</a>
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</li>
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<li class="chapter " data-level="3.1.2.9" data-path="1-02-09-more-printing.html">
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<a href="1-02-09-more-printing.html">
|
||
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More Printing
|
||
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</a>
|
||
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</li>
|
||
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<li class="chapter " data-level="3.1.2.10" data-path="1-02-10-prin1.html">
|
||
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||
|
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<a href="1-02-10-prin1.html">
|
||
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Printing With prin1
|
||
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</a>
|
||
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</li>
|
||
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<li class="chapter " data-level="3.1.2.11" data-path="1-02-11-princ.html">
|
||
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||
|
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<a href="1-02-11-princ.html">
|
||
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|
||
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|
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Printing With princ
|
||
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</a>
|
||
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||
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|
||
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|
||
|
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</li>
|
||
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||
|
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<li class="chapter " data-level="3.1.2.12" data-path="1-02-12-format.html">
|
||
|
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|
||
|
|
<a href="1-02-12-format.html">
|
||
|
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|
||
|
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|
||
|
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A Brief Introduction to Format
|
||
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|
||
|
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</a>
|
||
|
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|
||
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|
||
|
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||
|
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</li>
|
||
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|
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<li class="chapter " data-level="3.1.2.13" data-path="1-02-13-more-format.html">
|
||
|
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|
||
|
|
<a href="1-02-13-more-format.html">
|
||
|
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|
||
|
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|
||
|
|
A Little Bit More on Format
|
||
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|
||
|
|
</a>
|
||
|
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|
||
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|
||
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</li>
|
||
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|
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<li class="chapter " data-level="3.1.2.14" data-path="1-02-14-pathnames.html">
|
||
|
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|
||
|
|
<a href="1-02-14-pathnames.html">
|
||
|
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|
||
|
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|
||
|
|
Pathnames
|
||
|
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|
||
|
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</a>
|
||
|
|
|
||
|
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|
||
|
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|
||
|
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</li>
|
||
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|
||
|
|
<li class="chapter " data-level="3.1.2.15" data-path="1-02-15-streams.html">
|
||
|
|
|
||
|
|
<a href="1-02-15-streams.html">
|
||
|
|
|
||
|
|
|
||
|
|
Streams
|
||
|
|
|
||
|
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</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
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|
||
|
|
<li class="chapter " data-level="3.1.2.16" data-path="1-02-16-file-streams.html">
|
||
|
|
|
||
|
|
<a href="1-02-16-file-streams.html">
|
||
|
|
|
||
|
|
|
||
|
|
File Streams
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.2.17" data-path="1-02-17-binary-streams.html">
|
||
|
|
|
||
|
|
<a href="1-02-17-binary-streams.html">
|
||
|
|
|
||
|
|
|
||
|
|
Binary Streams
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.2.18" data-path="1-02-18-prompting-users.html">
|
||
|
|
|
||
|
|
<a href="1-02-18-prompting-users.html">
|
||
|
|
|
||
|
|
|
||
|
|
Prompting Users
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.2.19" data-path="1-02-19-pretty-printing.html">
|
||
|
|
|
||
|
|
<a href="1-02-19-pretty-printing.html">
|
||
|
|
|
||
|
|
|
||
|
|
Pretty-Printing
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.3" data-path="1-03-0-getting-input-from-users.html">
|
||
|
|
|
||
|
|
<a href="1-03-0-getting-input-from-users.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Getting Input from Users
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.4" data-path="1-04-0-lists.html">
|
||
|
|
|
||
|
|
<a href="1-04-0-lists.html">
|
||
|
|
|
||
|
|
|
||
|
|
Lists and List-Operations
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.5" data-path="1-05-0-lookups-trees.html">
|
||
|
|
|
||
|
|
<a href="1-05-0-lookups-trees.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Look-up Lists and Trees
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6" data-path="1-06-0-math.html">
|
||
|
|
|
||
|
|
<a href="1-06-0-math.html">
|
||
|
|
|
||
|
|
|
||
|
|
Numbers and Math
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<ul class="articles">
|
||
|
|
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.1" data-path="1-06-01-integers.html">
|
||
|
|
|
||
|
|
<a href="1-06-01-integers.html">
|
||
|
|
|
||
|
|
|
||
|
|
Integers
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.2" data-path="1-06-02-more-integers.html">
|
||
|
|
|
||
|
|
<a href="1-06-02-more-integers.html">
|
||
|
|
|
||
|
|
|
||
|
|
More Integers
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.3" data-path="1-06-03-hexadecimal-notation.html">
|
||
|
|
|
||
|
|
<a href="1-06-03-hexadecimal-notation.html">
|
||
|
|
|
||
|
|
|
||
|
|
Hexadecimal Integer Notation
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.4" data-path="1-06-04-octal-notation.html">
|
||
|
|
|
||
|
|
<a href="1-06-04-octal-notation.html">
|
||
|
|
|
||
|
|
|
||
|
|
Octal Integer Notation
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.5" data-path="1-06-05-binary-notation.html">
|
||
|
|
|
||
|
|
<a href="1-06-05-binary-notation.html">
|
||
|
|
|
||
|
|
|
||
|
|
Binary Integer Notation
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.6" data-path="1-06-06-ratios.html">
|
||
|
|
|
||
|
|
<a href="1-06-06-ratios.html">
|
||
|
|
|
||
|
|
|
||
|
|
Ratios and Rational Numbers
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.7" data-path="1-06-07-floating-point.html">
|
||
|
|
|
||
|
|
<a href="1-06-07-floating-point.html">
|
||
|
|
|
||
|
|
|
||
|
|
Floating-point Numbers
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.8" data-path="1-06-08-constants.html">
|
||
|
|
|
||
|
|
<a href="1-06-08-constants.html">
|
||
|
|
|
||
|
|
|
||
|
|
Numeric Constants
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.9" data-path="1-06-09-complex-numbers.html">
|
||
|
|
|
||
|
|
<a href="1-06-09-complex-numbers.html">
|
||
|
|
|
||
|
|
|
||
|
|
Complex Numbers
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.10" data-path="1-06-10-arithmetic.html">
|
||
|
|
|
||
|
|
<a href="1-06-10-arithmetic.html">
|
||
|
|
|
||
|
|
|
||
|
|
Arithmetic
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.11" data-path="1-06-11-more-arithmetic.html">
|
||
|
|
|
||
|
|
<a href="1-06-11-more-arithmetic.html">
|
||
|
|
|
||
|
|
|
||
|
|
More Arithmetic
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.12" data-path="1-06-12-even-more-arithmetic.html">
|
||
|
|
|
||
|
|
<a href="1-06-12-even-more-arithmetic.html">
|
||
|
|
|
||
|
|
|
||
|
|
Even More Arithmetic
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.13" data-path="1-06-13-exponents.html">
|
||
|
|
|
||
|
|
<a href="1-06-13-exponents.html">
|
||
|
|
|
||
|
|
|
||
|
|
Exponents
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.14" data-path="1-06-14-logarithms.html">
|
||
|
|
|
||
|
|
<a href="1-06-14-logarithms.html">
|
||
|
|
|
||
|
|
|
||
|
|
Logarithms
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.15" data-path="1-06-15-trigonometry.html">
|
||
|
|
|
||
|
|
<a href="1-06-15-trigonometry.html">
|
||
|
|
|
||
|
|
|
||
|
|
Trigonometry
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.6.16" data-path="1-06-16-psuedorandom-numbers.html">
|
||
|
|
|
||
|
|
<a href="1-06-16-psuedorandom-numbers.html">
|
||
|
|
|
||
|
|
|
||
|
|
Pseudo-Random Numbers
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.7" data-path="1-07-0-arrays.html">
|
||
|
|
|
||
|
|
<a href="1-07-0-arrays.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Arrays and Vectors
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.8" data-path="1-08-0-variables.html">
|
||
|
|
|
||
|
|
<a href="1-08-0-variables.html">
|
||
|
|
|
||
|
|
|
||
|
|
Variables, Parameters, and Constants
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.9" data-path="1-09-0-closures.html">
|
||
|
|
|
||
|
|
<a href="1-09-0-closures.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Closures
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.10" data-path="1-10-0-functions.html">
|
||
|
|
|
||
|
|
<a href="1-10-0-functions.html">
|
||
|
|
|
||
|
|
|
||
|
|
Functions and Macros
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.11" data-path="1-11-0-text-adventure.html">
|
||
|
|
|
||
|
|
<a href="1-11-0-text-adventure.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: A Simple Text Adventure
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.12" data-path="1-12-0-namespaces.html">
|
||
|
|
|
||
|
|
<a href="1-12-0-namespaces.html">
|
||
|
|
|
||
|
|
|
||
|
|
Namespaces, Symbols, Packages, and Systems
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.13" data-path="1-13-0-simple-web-app.html">
|
||
|
|
|
||
|
|
<a href="1-13-0-simple-web-app.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: A Simple Web Application
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.14" data-path="1-14-0-conditionals.html">
|
||
|
|
|
||
|
|
<a href="1-14-0-conditionals.html">
|
||
|
|
|
||
|
|
|
||
|
|
Conditionals
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.15" data-path="1-15-0-command-line-utility.html">
|
||
|
|
|
||
|
|
<a href="1-15-0-command-line-utility.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Command-Line Utilities
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.16" data-path="1-16-0-map-loop.html">
|
||
|
|
|
||
|
|
<a href="1-16-0-map-loop.html">
|
||
|
|
|
||
|
|
|
||
|
|
Mapping and Looping
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.17" data-path="1-17-0-iterate.html">
|
||
|
|
|
||
|
|
<a href="1-17-0-iterate.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Revisiting Loops with Iterate
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.18" data-path="1-18-0-format.html">
|
||
|
|
|
||
|
|
<a href="1-18-0-format.html">
|
||
|
|
|
||
|
|
|
||
|
|
Format Strings
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.19" data-path="1-19-0-dsl.html">
|
||
|
|
|
||
|
|
<a href="1-19-0-dsl.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Domain Specific Languages
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="3.1.20" data-path="1-20-0-review.html">
|
||
|
|
|
||
|
|
<a href="1-20-0-review.html">
|
||
|
|
|
||
|
|
|
||
|
|
Part One in Review
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<li class="header">PART TWO</li>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1" data-path="2-0-0-overview.html">
|
||
|
|
|
||
|
|
<a href="2-0-0-overview.html">
|
||
|
|
|
||
|
|
|
||
|
|
The Suffusion of Blue
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<ul class="articles">
|
||
|
|
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.1" data-path="2-01-0-programming-paradigms.html">
|
||
|
|
|
||
|
|
<a href="2-01-0-programming-paradigms.html">
|
||
|
|
|
||
|
|
|
||
|
|
Programming Paradigms
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.2" data-path="2-02-0-regex.html">
|
||
|
|
|
||
|
|
<a href="2-02-0-regex.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Regular Expressions
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.3" data-path="2-03-0-objects-control.html">
|
||
|
|
|
||
|
|
<a href="2-03-0-objects-control.html">
|
||
|
|
|
||
|
|
|
||
|
|
Objects and Control Structures
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.4" data-path="2-04-0-data-persistence.html">
|
||
|
|
|
||
|
|
<a href="2-04-0-data-persistence.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Persistence and Databases
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.5" data-path="2-05-0-extended-types.html">
|
||
|
|
|
||
|
|
<a href="2-05-0-extended-types.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extended Types
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.6" data-path="2-06-0-threads-memos-parallel.html">
|
||
|
|
|
||
|
|
<a href="2-06-0-threads-memos-parallel.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Concurrency and Memoization
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.7" data-path="2-07-0-logic-and-more-math.html">
|
||
|
|
|
||
|
|
<a href="2-07-0-logic-and-more-math.html">
|
||
|
|
|
||
|
|
|
||
|
|
Logic and Advanced Math
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.8" data-path="2-08-0-number-theory.html">
|
||
|
|
|
||
|
|
<a href="2-08-0-number-theory.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Number Theory
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.9" data-path="2-09-0-binary-octets-bits.html">
|
||
|
|
|
||
|
|
<a href="2-09-0-binary-octets-bits.html">
|
||
|
|
|
||
|
|
|
||
|
|
Binary Streams, Octet-Vectors, and Bit-Vectors
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.10" data-path="2-10-0-improved-text-adventure-engine.html">
|
||
|
|
|
||
|
|
<a href="2-10-0-improved-text-adventure-engine.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: An Improved Text Adventure Engine
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.11" data-path="2-11-0-conditions.html">
|
||
|
|
|
||
|
|
<a href="2-11-0-conditions.html">
|
||
|
|
|
||
|
|
|
||
|
|
Conditions and Error Handling
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.12" data-path="2-12-0-2d-game.html">
|
||
|
|
|
||
|
|
<a href="2-12-0-2d-game.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Write a 2D Game
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.13" data-path="2-13-0-compiler.html">
|
||
|
|
|
||
|
|
<a href="2-13-0-compiler.html">
|
||
|
|
|
||
|
|
|
||
|
|
The Compiler
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.14" data-path="2-14-0-tree-shaker.html">
|
||
|
|
|
||
|
|
<a href="2-14-0-tree-shaker.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Write a Tree-Shaker
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.15" data-path="2-15-0-docs-and-inspection.html">
|
||
|
|
|
||
|
|
<a href="2-15-0-docs-and-inspection.html">
|
||
|
|
|
||
|
|
|
||
|
|
Documentation and Inspection
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.16" data-path="2-16-0-foreign-libs.html">
|
||
|
|
|
||
|
|
<a href="2-16-0-foreign-libs.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Foreign Libraries in Lisp
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.17" data-path="2-17-0-debugging-testing.html">
|
||
|
|
|
||
|
|
<a href="2-17-0-debugging-testing.html">
|
||
|
|
|
||
|
|
|
||
|
|
Debugging and Unit Testing
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.18" data-path="2-18-0-ffi.html">
|
||
|
|
|
||
|
|
<a href="2-18-0-ffi.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Write a Foreign Function Interface
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.19" data-path="2-19-0-essential-libs.html">
|
||
|
|
|
||
|
|
<a href="2-19-0-essential-libs.html">
|
||
|
|
|
||
|
|
|
||
|
|
Essential Lisp Libraries
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.20" data-path="2-20-0-packaging-libs.html">
|
||
|
|
|
||
|
|
<a href="2-20-0-packaging-libs.html">
|
||
|
|
|
||
|
|
|
||
|
|
Extra Credit: Packaging Lisp Libraries
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="4.1.21" data-path="2-21-0-review.html">
|
||
|
|
|
||
|
|
<a href="2-21-0-review.html">
|
||
|
|
|
||
|
|
|
||
|
|
Detailed Syntax Review
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<li class="header">PART THREE</li>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<li class="chapter " data-level="5.1" data-path="3-00-00-overview.html">
|
||
|
|
|
||
|
|
<a href="3-00-00-overview.html">
|
||
|
|
|
||
|
|
|
||
|
|
Lisp So(u)rcery
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<ul class="articles">
|
||
|
|
|
||
|
|
|
||
|
|
<li class="chapter " data-level="5.1.1" data-path="3-01-00-web-apps.html">
|
||
|
|
|
||
|
|
<a href="3-01-00-web-apps.html">
|
||
|
|
|
||
|
|
|
||
|
|
Real-world Web Apps
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="5.1.2" data-path="3-02-00-typesetting.html">
|
||
|
|
|
||
|
|
<a href="3-02-00-typesetting.html">
|
||
|
|
|
||
|
|
|
||
|
|
Typesetting
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="chapter " data-level="5.1.3" data-path="3-03-00-mobile.html">
|
||
|
|
|
||
|
|
<a href="3-03-00-mobile.html">
|
||
|
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|
||
|
|
|
||
|
|
Native Mobile Applications
|
||
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|
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</a>
|
||
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|
||
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|
||
|
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</li>
|
||
|
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|
||
|
|
<li class="chapter " data-level="5.1.4" data-path="3-04-00-gui.html">
|
||
|
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|
||
|
|
<a href="3-04-00-gui.html">
|
||
|
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|
||
|
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|
||
|
|
Cross-platform Desktop Applications
|
||
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|
||
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</a>
|
||
|
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|
||
|
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|
||
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||
|
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</li>
|
||
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<li class="chapter " data-level="5.1.5" data-path="3-05-00-system-utils.html">
|
||
|
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|
||
|
|
<a href="3-05-00-system-utils.html">
|
||
|
|
|
||
|
|
|
||
|
|
Drivers, Daemons, and System-Utilities
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
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</li>
|
||
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<li class="chapter " data-level="5.1.6" data-path="3-06-00-reverse-engineering.html">
|
||
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|
||
|
|
<a href="3-06-00-reverse-engineering.html">
|
||
|
|
|
||
|
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|
||
|
|
Reverse Engineering
|
||
|
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|
||
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</a>
|
||
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|
||
|
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|
||
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</li>
|
||
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<li class="chapter " data-level="5.1.7" data-path="3-07-00-graphics.html">
|
||
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|
||
|
|
<a href="3-07-00-graphics.html">
|
||
|
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|
||
|
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|
||
|
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Graphics Rendering
|
||
|
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|
||
|
|
</a>
|
||
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|
||
|
|
|
||
|
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||
|
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</li>
|
||
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|
||
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<li class="chapter " data-level="5.1.8" data-path="3-08-00-gaming.html">
|
||
|
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|
||
|
|
<a href="3-08-00-gaming.html">
|
||
|
|
|
||
|
|
|
||
|
|
OpenGL, SDL, and 3D Game Development
|
||
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|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
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</li>
|
||
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<li class="chapter " data-level="5.1.9" data-path="3-09-00-audio.html">
|
||
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|
||
|
|
<a href="3-09-00-audio.html">
|
||
|
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|
||
|
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|
||
|
|
Audio Generation and Manipulation
|
||
|
|
|
||
|
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</a>
|
||
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|
|
||
|
|
|
||
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||
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</li>
|
||
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<li class="chapter " data-level="5.1.10" data-path="3-10-00-data.html">
|
||
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<a href="3-10-00-data.html">
|
||
|
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|
||
|
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||
|
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Data Aggregation and Analysis
|
||
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|
||
|
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</a>
|
||
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|
||
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|
||
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</li>
|
||
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<li class="chapter " data-level="5.1.11" data-path="3-11-00-cryptosec.html">
|
||
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||
|
|
<a href="3-11-00-cryptosec.html">
|
||
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|
||
|
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|
||
|
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Cryptography and Security
|
||
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|
||
|
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</a>
|
||
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||
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|
||
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|
||
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<li class="chapter " data-level="5.1.12" data-path="3-12-00-fintech.html">
|
||
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<a href="3-12-00-fintech.html">
|
||
|
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|
||
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|
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Financial Software and Crypto-Currencies
|
||
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||
|
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</a>
|
||
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|
||
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<li class="chapter " data-level="5.1.13" data-path="3-13-00-scientific-computing.html">
|
||
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||
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<a href="3-13-00-scientific-computing.html">
|
||
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|
||
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|
||
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Scientific Computing
|
||
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</a>
|
||
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|
||
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<li class="chapter " data-level="5.1.14" data-path="3-14-00-computational-physics.html">
|
||
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|
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<a href="3-14-00-computational-physics.html">
|
||
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|
||
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Computational Physics
|
||
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|
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</a>
|
||
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|
||
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|
||
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|
||
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<li class="chapter " data-level="5.1.15" data-path="3-15-00-quantum-computing.html">
|
||
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|
||
|
|
<a href="3-15-00-quantum-computing.html">
|
||
|
|
|
||
|
|
|
||
|
|
Quantum Computing
|
||
|
|
|
||
|
|
</a>
|
||
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|
||
|
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|
||
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|
||
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<li class="chapter " data-level="5.1.16" data-path="3-16-00-nlp.html">
|
||
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|
||
|
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<a href="3-16-00-nlp.html">
|
||
|
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|
||
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|
||
|
|
Natural Language Processing
|
||
|
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|
||
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</a>
|
||
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|
||
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|
||
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||
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</li>
|
||
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<li class="chapter " data-level="5.1.17" data-path="3-17-00-ai.html">
|
||
|
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|
||
|
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<a href="3-17-00-ai.html">
|
||
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|
||
|
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|
||
|
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Artificial Intelligence
|
||
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|
||
|
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</a>
|
||
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|
||
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|
||
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<li class="chapter " data-level="5.1.18" data-path="3-18-00-robotics.html">
|
||
|
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|
||
|
|
<a href="3-18-00-robotics.html">
|
||
|
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|
||
|
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|
||
|
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Robotics
|
||
|
|
|
||
|
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</a>
|
||
|
|
|
||
|
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|
||
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||
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</li>
|
||
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|
||
|
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<li class="chapter active" data-level="5.1.19" data-path="3-19-00-space-tech.html">
|
||
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|
||
|
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<a href="3-19-00-space-tech.html">
|
||
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|
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|
||
|
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Space Tech
|
||
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|
|
||
|
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</a>
|
||
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|
||
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|
||
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</li>
|
||
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<li class="chapter " data-level="5.1.20" data-path="3-20-00-neurotech.html">
|
||
|
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|
||
|
|
<a href="3-20-00-neurotech.html">
|
||
|
|
|
||
|
|
|
||
|
|
Neuroscience and Thought-Controlled Computing
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
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|
||
|
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</li>
|
||
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|
||
|
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<li class="chapter " data-level="5.1.21" data-path="3-21-00-lispos.html">
|
||
|
|
|
||
|
|
<a href="3-21-00-lispos.html">
|
||
|
|
|
||
|
|
|
||
|
|
A Simple LispOS
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</li>
|
||
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|
|
||
|
|
<li class="chapter " data-level="5.1.22" data-path="3-22-00-lisp-machine.html">
|
||
|
|
|
||
|
|
<a href="3-22-00-lisp-machine.html">
|
||
|
|
|
||
|
|
|
||
|
|
Build Your Own Lisp Machine
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
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|
||
|
|
</li>
|
||
|
|
|
||
|
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<li class="chapter " data-level="5.1.23" data-path="3-23-00-gov-mil.html">
|
||
|
|
|
||
|
|
<a href="3-23-00-gov-mil.html">
|
||
|
|
|
||
|
|
|
||
|
|
Government and Military Grade Systems
|
||
|
|
|
||
|
|
</a>
|
||
|
|
|
||
|
|
|
||
|
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|
||
|
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</li>
|
||
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|
||
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|
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<li class="divider"></li>
|
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<li>
|
||
|
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<a href="https://www.gitbook.com" target="blank" class="gitbook-link">
|
||
|
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Published with GitBook
|
||
|
|
</a>
|
||
|
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</li>
|
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|
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</ul>
|
||
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</nav>
|
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|
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|
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<!-- Title -->
|
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<h1>
|
||
|
|
<i class="fa fa-circle-o-notch fa-spin"></i>
|
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|
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<a href="index.html" >Space Tech</a>
|
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</h1>
|
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</div>
|
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|
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|
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|
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<section class="normal markdown-section">
|
||
|
|
|
||
|
|
<h1 id="chapter-319">Chapter 3.19</h1>
|
||
|
|
<h2 id="space-tech">Space-Tech</h2>
|
||
|
|
<blockquote>
|
||
|
|
<p>"People don't really want change, any change at all... But we progress, as we must---if we are to go out to the stars."</p>
|
||
|
|
<footer>Robert A. Heinlein, <em>Double Star</em></footer>
|
||
|
|
|
||
|
|
</blockquote>
|
||
|
|
<p>All software has bugs in it---it's just a part of life in a technologically-driven society---but not all bugs are actual mistakes, per se. Sometimes they can be no more than an application of the wrong algorithm to a given problem, which provides an apparently correct answer, say, 99% of the time, but then produces something completely wrong in that last 1% of the cases. Here, on Earth, bugs in software can cause significant problems as it is, which is why so much time and effort is spent on QA and software updates; but imagine how much trouble a bug could be in a Probe, Satellite, or Space-Craft, where a technical support and development team can't directly access the hardware, and in dealing with the vast distances of space, have so much lag between any event, the notification of it, and the hardware getting the updated code.</p>
|
||
|
|
<p>Traditional software development lifecycles and technologies are inherently at a disadvantage in Space Tech, an industry where you can't afford to make any mistakes. One of the most important features needed in any space-based platform is the ability to immediately get inside the running application, identify a bug and fix it while the application is running. <em>Lisp was designed to do this</em>. And certainly, NASA validated this point quite strongly with Deep Space 1 and the Remote Agent Experiment (RAX).</p>
|
||
|
|
<p>Now, imagine the relative convenience of a space-craft where all the systems are programmed in Lisp, and are thus live hackable; astronauts are already highly trained, highly intelligent and resourceful individuals who can cope with the stresses of life in space---and it would not be much of a stretch to add programming in Lisp to their list of necessary skills. If they had the option to control all systems from a REPL, extend, test, and fix mission critical software interactively, on an as-needed basis, they would be significantly better equipped to handle any of the many issues that can arise in space, in a much more timely fashion than mission control on Earth can respond. Those precious seconds of lag in communication between Earth and a space-craft can mean the difference between mission failure and success.</p>
|
||
|
|
<p>Space Tech is a complex field of interrelated, specialized disciplines---and inevitably, after a cursory introduction to the field as a whole in an undergraduate program, students are expected to focus on one of the many specializations, such as astrophysics, propulsion, aerospace engineering, communications, etc. But it is advantageous to have a big picture, wide-view of the field before choosing a specialization.</p>
|
||
|
|
<p>In this chapter, we will explore a very high-level overview of a selection of the topics in the field of Space Tech, namely astrophysics, microgravity, properties of vacuums and near-vacuums, propulsion, aerospace engineering, and communication; design idealized model satellites and probes, integrating a basic AI that can be overridden by a controller on Earth; and implement an environment to simulate space-like conditions for testing these models. And lastly, we will extend this text-based simulator to a 3D simulation, where you can see your model space-craft in action.</p>
|
||
|
|
<h3 id="exercise-3191">Exercise 3.19.1</h3>
|
||
|
|
<p><strong>Simulating Physics and Astrophysics</strong></p>
|
||
|
|
<pre><code class="lang-lisp">
|
||
|
|
|
||
|
|
</code></pre>
|
||
|
|
<h3 id="exercise-3192">Exercise 3.19.2</h3>
|
||
|
|
<p><strong>Microgravity</strong></p>
|
||
|
|
<pre><code class="lang-lisp">
|
||
|
|
|
||
|
|
</code></pre>
|
||
|
|
<h3 id="exercise-3193">Exercise 3.19.3</h3>
|
||
|
|
<p><strong>Vacuums and Near-Vacuums</strong></p>
|
||
|
|
<pre><code class="lang-lisp">
|
||
|
|
|
||
|
|
</code></pre>
|
||
|
|
<h3 id="exercise-3194">Exercise 3.19.4</h3>
|
||
|
|
<p><strong>Orbits</strong></p>
|
||
|
|
<pre><code class="lang-lisp">
|
||
|
|
|
||
|
|
</code></pre>
|
||
|
|
<h3 id="exercise-3195">Exercise 3.19.5</h3>
|
||
|
|
<p><strong>Simulating Space-Tech</strong></p>
|
||
|
|
<pre><code class="lang-lisp">
|
||
|
|
|
||
|
|
</code></pre>
|
||
|
|
<h3 id="exercise-3196">Exercise 3.19.6</h3>
|
||
|
|
<p><strong>Basic Principles of Aerospace Engineering</strong></p>
|
||
|
|
<pre><code class="lang-lisp">
|
||
|
|
|
||
|
|
</code></pre>
|
||
|
|
<h3 id="exercise-3197">Exercise 3.19.7</h3>
|
||
|
|
<p><strong>Propulsion</strong></p>
|
||
|
|
<pre><code class="lang-lisp">
|
||
|
|
|
||
|
|
</code></pre>
|
||
|
|
<h3 id="exercise-3198">Exercise 3.19.8</h3>
|
||
|
|
<p><strong>Communication</strong></p>
|
||
|
|
<pre><code class="lang-lisp">
|
||
|
|
|
||
|
|
</code></pre>
|
||
|
|
<h3 id="exercise-3199">Exercise 3.19.9</h3>
|
||
|
|
<p><strong>A Controller AI</strong></p>
|
||
|
|
<pre><code class="lang-lisp">
|
||
|
|
|
||
|
|
</code></pre>
|
||
|
|
<h3 id="exercise-31910">Exercise 3.19.10</h3>
|
||
|
|
<p><strong>Unmanned Spacecraft</strong></p>
|
||
|
|
<pre><code class="lang-lisp">
|
||
|
|
|
||
|
|
</code></pre>
|
||
|
|
<h3 id="exercise-31911">Exercise 3.19.11</h3>
|
||
|
|
<p><strong>Simulating Life-Support for Manned Spacecraft</strong></p>
|
||
|
|
<pre><code class="lang-lisp">
|
||
|
|
|
||
|
|
</code></pre>
|
||
|
|
<h3 id="exercise-31912">Exercise 3.19.12</h3>
|
||
|
|
<p><strong>Live Hacking Mission-Critical Systems</strong></p>
|
||
|
|
<pre><code class="lang-lisp">
|
||
|
|
|
||
|
|
</code></pre>
|
||
|
|
<h3 id="project-31913">Project 3.19.13</h3>
|
||
|
|
<p><strong>A 3D Space Simulator</strong></p>
|
||
|
|
<pre><code class="lang-lisp">
|
||
|
|
|
||
|
|
</code></pre>
|
||
|
|
|
||
|
|
|
||
|
|
</section>
|
||
|
|
|
||
|
|
</div>
|
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|
|
<div class="search-results">
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<div class="has-results">
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|
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<h1 class="search-results-title"><span class='search-results-count'></span> results matching "<span class='search-query'></span>"</h1>
|
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