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<html><head><meta http-equiv="content-type" content="text-html; charset=utf-8" /><title>9 Epilogue</title><link rel="stylesheet" type="text/css" href="scribble.css" title="default" /><link rel="stylesheet" type="text/css" href="racket.css" title="default" /><link rel="stylesheet" type="text/css" href="scribble-style.css" title="default" /><link rel="stylesheet" type="text/css" href="gh.css" title="default" /><script type="text/javascript" src="scribble-common.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--><meta name="keywords" content="Racket,macros,Scheme"><meta name="description" content="Practical Racket macros"><meta name="author" content="Greg Hendershott"><meta name="charset" content="utf-8"><link href='http://fonts.googleapis.com/css?family=Fenix' rel='stylesheet' type='text/css'><script type="text/javascript">var _gaq = _gaq || [];_gaq.push(['_setAccount', 'UA-29709446-1']);_gaq.push(['_setDomainName', 'greghendershott.com']);_gaq.push(['_trackPageview']);(function() {var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);})();</script></head><body id="scribble-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist" style="margin-bottom: 1em;"><div class="tocviewtitle"><table cellspacing="0" cellpadding="0"><tr><td style="width: 1em;"><a href="javascript:void(0);" title="Expand/Collapse" class="tocviewtoggle" onclick="TocviewToggle(this,"tocview_0");">▼</a></td><td></td><td><a href="index.html" class="tocviewlink" pltdoc="x">Fear of Macros</a></td></tr></table></div><div class="tocviewsublistonly" style="display: block;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1 </td><td><a href="Preface.html" class="tocviewlink" pltdoc="x">Preface</a></td></tr><tr><td align="right">2 </td><td><a href="Our_plan_of_attack.html" class="tocviewlink" pltdoc="x">Our plan of attack</a></td></tr><tr><td align="right">3 </td><td><a href="Transform_.html" class="tocviewlink" pltdoc="x">Transform!</a></td></tr><tr><td align="right">4 </td><td><a href="pattern-matching.html" class="tocviewlink" pltdoc="x">Pattern matching:<span class="mywbr"> </span> syntax-<wbr></wbr>case and syntax-<wbr></wbr>rules</a></td></tr><tr><td align="right">5 </td><td><a href="Syntax_parameters.html" class="tocviewlink" pltdoc="x">Syntax parameters</a></td></tr><tr><td align="right">6 </td><td><a href="What_s_the_point_of_splicing-let_.html" class="tocviewlink" pltdoc="x">What’s the point of <span class="RktSym"><span class="RktStxLink">splicing-<wbr></wbr>let</span></span>?</a></td></tr><tr><td align="right">7 </td><td><a href="Robust_macros__syntax-parse.html" class="tocviewlink" pltdoc="x">Robust macros:<span class="mywbr"> </span> syntax-<wbr></wbr>parse</a></td></tr><tr><td align="right">8 </td><td><a href="References_and_Acknowledgments.html" class="tocviewlink" pltdoc="x">References and Acknowledgments</a></td></tr><tr><td align="right">9 </td><td><a href="" class="tocviewselflink" pltdoc="x">Epilogue</a></td></tr></table></div></div></div></div><div class="maincolumn"><div class="main"><div class="navsettop"><span class="navleft"> </span><span class="navright"><a href="References_and_Acknowledgments.html" title="backward to "8 References and Acknowledgments"" pltdoc="x">← prev</a> <a href="index.html" title="up to "Fear of Macros"" pltdoc="x">up</a> <span class="nonavigation">next →</span></span> </div><h3>9<tt> </tt><a name="(part._.Epilogue)"></a>Epilogue</h3><blockquote class="SCentered"><p>"Before I had studied Chan (Zen) for thirty years, I saw mountains as
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mountains, and rivers as rivers. When I arrived at a more intimate
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knowledge, I came to the point where I saw that mountains are not
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mountains, and rivers are not rivers. But now that I have got its very
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substance I am at rest. For it’s just that I see mountains once again
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as mountains, and rivers once again as rivers"</p><p><span class="Smaller">–Buddhist saying originally formulated by Qingyuan Weixin,
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later translated by D.T. Suzuki in his <span style="font-style: italic">Essays in Zen
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Buddhism</span>.</span></p></blockquote><p>Translated into Racket:</p><blockquote class="SCodeFlow"><table cellspacing="0" class="RktBlk"><tr><td><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/cont.html#(def._((quote._~23~25kernel)._dynamic-wind))" class="RktValLink" pltdoc="x">dynamic-wind</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/lambda.html#(form._((lib._racket%2Fprivate%2Fbase..rkt)._lambda))" class="RktStxLink" pltdoc="x">lambda</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/if.html#(form._((lib._racket%2Fprivate%2Fletstx-scheme..rkt)._and))" class="RktStxLink" pltdoc="x">and</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/booleans.html#(def._((quote._~23~25kernel)._eq~3f))" class="RktValLink" pltdoc="x">eq?</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">mountains</span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">mountains</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/booleans.html#(def._((quote._~23~25kernel)._eq~3f))" class="RktValLink" pltdoc="x">eq?</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">rivers</span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">rivers</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/lambda.html#(form._((lib._racket%2Fprivate%2Fbase..rkt)._lambda))" class="RktStxLink" pltdoc="x">lambda</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/booleans.html#(def._((quote._~23~25kernel)._not))" class="RktValLink" pltdoc="x">not</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/if.html#(form._((lib._racket%2Fprivate%2Fletstx-scheme..rkt)._and))" class="RktStxLink" pltdoc="x">and</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/booleans.html#(def._((quote._~23~25kernel)._eq~3f))" class="RktValLink" pltdoc="x">eq?</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">mountains</span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">mountains</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/booleans.html#(def._((quote._~23~25kernel)._eq~3f))" class="RktValLink" pltdoc="x">eq?</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">rivers</span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">rivers</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/lambda.html#(form._((lib._racket%2Fprivate%2Fbase..rkt)._lambda))" class="RktStxLink" pltdoc="x">lambda</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/if.html#(form._((lib._racket%2Fprivate%2Fletstx-scheme..rkt)._and))" class="RktStxLink" pltdoc="x">and</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/booleans.html#(def._((quote._~23~25kernel)._eq~3f))" class="RktValLink" pltdoc="x">eq?</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">mountains</span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">mountains</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://docs.racket-lang.org/reference/booleans.html#(def._((quote._~23~25kernel)._eq~3f))" class="RktValLink" pltdoc="x">eq?</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">rivers</span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">rivers</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr></table></blockquote><div class="navsetbottom"><span class="navleft"> </span><span class="navright"><a href="References_and_Acknowledgments.html" title="backward to "8 References and Acknowledgments"" pltdoc="x">← prev</a> <a href="index.html" title="up to "Fear of Macros"" pltdoc="x">up</a> <span class="nonavigation">next →</span></span> </div></div></div><div id="contextindicator"> </div></body></html> |