402 lines
18 KiB
HTML
402 lines
18 KiB
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<title>Zapiski #1 srečanja programerskega bralnega krožka SICP</title>
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{ font-size: 10px; font-weight: bold; white-space: nowrap; }
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.org-svg { }
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</style>
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</head>
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<body>
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<div id="content" class="content">
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<h1 class="title">Zapiski #1 srečanja programerskega bralnega krožka SICP</h1>
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<div id="outline-container-org42dee3b" class="outline-2">
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<h2 id="org42dee3b">Zanimivi izseki</h2>
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<div class="outline-text-2" id="text-org42dee3b">
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</div>
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<div id="outline-container-orgdf32ea0" class="outline-3">
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<h3 id="orgdf32ea0">str. 9</h3>
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<div class="outline-text-3" id="text-orgdf32ea0">
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<blockquote>
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<p>
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Every reader should ask himself periodically "Toward what end, toward what end?" — but do not ask it too often lest you pass up the fun of programming for the constipation of bittersweet philosophy.
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</p>
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</blockquote>
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<blockquote>
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<p>
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Lisp is a survivor, having been in use for about a quarter of a century.
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</p>
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</blockquote>
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</div>
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</div>
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<div id="outline-container-org8373b18" class="outline-3">
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<h3 id="org8373b18">str. 11</h3>
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<div class="outline-text-3" id="text-org8373b18">
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<blockquote>
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<p>
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It is better to have 100 functions operate on one data structure than to have 10 functions operate on 10 data structures.
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</p>
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</blockquote>
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</div>
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</div>
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<div id="outline-container-org3dac309" class="outline-3">
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<h3 id="org3dac309">str. 18</h3>
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<div class="outline-text-3" id="text-org3dac309">
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<blockquote>
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<p>
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Thus, programs must be written for people to read, and only incidentally for machines to execute.
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</p>
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</blockquote>
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</div>
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</div>
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<div id="outline-container-org7994660" class="outline-3">
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<h3 id="org7994660">str. 19</h3>
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<div class="outline-text-3" id="text-org7994660">
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<blockquote>
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<p>
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Underlying our approach to this subject is our conviction that "computer science" is not a science and that its significance has little to do with computers.
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</p>
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</blockquote>
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</div>
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</div>
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<div id="outline-container-org3d45fa2" class="outline-3">
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<h3 id="org3d45fa2">str. 27</h3>
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<div class="outline-text-3" id="text-org3d45fa2">
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<blockquote>
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<p>
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Finally, we would like to acknowledge the support of the organizations that have encouraged this work over the years, including support from Hewlett-Packard, made possible by Ira Goldstein and Joel Birnbaum, and support from DARPA, made possible by Bob Kahn.
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</p>
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</blockquote>
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<p>
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Bob Kahn je mdr. soavtor protokolov TCP in IP, pionir omreževanja. V DARPA postal kasneje direktor IPTO (Informational Processing Techniques Office), kjer je ustanovil milijardo-dolarski projekt Strategic Copmuting Initiative, največjo investicijo ameriške federalne vlade v računalništvo ever ('83 do '93) - razvijali so proizvodnjo čipov in umetne inteligence. Ustrašili so se japoncev, podobno kot v 50ih sovjetov.
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</p>
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<p>
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Po DARPA ustanovil CNRI (corporation for national research initiatives), neprofitno organizacijo kjer je delal tudi guido van rossum (avtor pythona). Tam so izdali python verzije 1.3 do 1.6 ter GNU mailman.
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</p>
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<p>
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Preko očeta v sorodu s fizikom Hermanom Kahnom, ki je napisal knjigo o tem kako bi amerika lahko zmagala nuklearno vojno in postal inspiracija za dr. Strangelove-a v znanem Kubrickovem filmu. Ustanovil je Hudson institut, konzervativni think tank ki je začel pri premišljevanju hladnovojnih scenarijev in se razširil na polja ekonomije, zdravstva, šolstva in gemblanja. Delal je tudi v RAND korporaciji, močnem hladnovojnem inštitutu, vpletenem v vietnamsko vojno, iraško vojno, danes pa kuri "AI apokaliptični" scenarij.
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</p>
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</div>
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</div>
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<div id="outline-container-org0861788" class="outline-3">
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<h3 id="org0861788">str. 77</h3>
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<div class="outline-text-3" id="text-org0861788">
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<p>
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Stoy 1977
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</p>
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</div>
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</div>
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</div>
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<div id="outline-container-orgfcfaeb8" class="outline-2">
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<h2 id="orgfcfaeb8">Vaje</h2>
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<div class="outline-text-2" id="text-orgfcfaeb8">
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</div>
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<div id="outline-container-org9ddb5fa" class="outline-3">
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<h3 id="org9ddb5fa">1.1 Kaj vrnejo izrazi?</h3>
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</div>
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<div id="outline-container-org77dfe73" class="outline-3">
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<h3 id="org77dfe73">1.2 Pretvori izraz v prefix obliko</h3>
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<div class="outline-text-3" id="text-org77dfe73">
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<div class="org-src-container">
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<pre class="src src-scheme"><span style="color: #458588;">(</span>/ <span style="color: #b16286;">(</span>+ 5 4
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<span style="color: #8ec07c;">(</span>- 2
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<span style="color: #d65d0e;">(</span>- 3
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<span style="color: #458588;">(</span>+ 6
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1/3<span style="color: #458588;">)</span><span style="color: #d65d0e;">)</span><span style="color: #8ec07c;">)</span><span style="color: #b16286;">)</span>
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<span style="color: #b16286;">(</span>* 3
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<span style="color: #8ec07c;">(</span>- 6 2<span style="color: #8ec07c;">)</span>
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<span style="color: #8ec07c;">(</span>- 2 7<span style="color: #8ec07c;">)</span><span style="color: #b16286;">)</span><span style="color: #458588;">)</span>
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</pre>
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</div>
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<pre class="example">
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-43/180
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</pre>
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</div>
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</div>
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<div id="outline-container-org30e4913" class="outline-3">
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<h3 id="org30e4913">1.3 procedura, ki prejme 3 argumente in vrne vsoto kvadratov vecjih dveh</h3>
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<div class="outline-text-3" id="text-org30e4913">
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<div class="org-src-container">
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<pre class="src src-scheme"><span style="color: #458588;">(</span><span style="color: #fb4933;">define</span> <span style="color: #b16286;">(</span><span style="color: #fabd2f;">vsota-vecjih-kvadratov</span> a b c<span style="color: #b16286;">)</span>
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<span style="color: #b16286;">(</span><span style="color: #fb4933;">cond</span> <span style="color: #8ec07c;">(</span><span style="color: #d65d0e;">(</span><= a b c<span style="color: #d65d0e;">)</span> <span style="color: #d65d0e;">(</span>+ <span style="color: #458588;">(</span>* b b<span style="color: #458588;">)</span> <span style="color: #458588;">(</span>* c c<span style="color: #458588;">)</span><span style="color: #d65d0e;">)</span><span style="color: #8ec07c;">)</span>
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<span style="color: #8ec07c;">(</span><span style="color: #d65d0e;">(</span><= b a c<span style="color: #d65d0e;">)</span> <span style="color: #d65d0e;">(</span>+ <span style="color: #458588;">(</span>* a a<span style="color: #458588;">)</span> <span style="color: #458588;">(</span>* c c<span style="color: #458588;">)</span><span style="color: #d65d0e;">)</span><span style="color: #8ec07c;">)</span>
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<span style="color: #8ec07c;">(</span><span style="color: #fb4933;">else</span> <span style="color: #d65d0e;">(</span>+ <span style="color: #458588;">(</span>* b b<span style="color: #458588;">)</span> <span style="color: #458588;">(</span>* a a<span style="color: #458588;">)</span><span style="color: #d65d0e;">)</span><span style="color: #8ec07c;">)</span><span style="color: #b16286;">)</span><span style="color: #458588;">)</span>
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<span style="color: #7c6f64;">;; </span><span style="color: #7c6f64;">^ NAROBE! <= primerja vse tri stevilke, ne prvo z drugima dvema oz. ostalimi</span>
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<span style="color: #458588;">(</span><span style="color: #fb4933;">define</span> <span style="color: #b16286;">(</span><span style="color: #fabd2f;">+kvadrat</span> a b<span style="color: #b16286;">)</span> <span style="color: #b16286;">(</span>+ <span style="color: #8ec07c;">(</span>* a a<span style="color: #8ec07c;">)</span> <span style="color: #8ec07c;">(</span>* b b<span style="color: #8ec07c;">)</span><span style="color: #b16286;">)</span><span style="color: #458588;">)</span>
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<span style="color: #458588;">(</span><span style="color: #fb4933;">define</span> <span style="color: #b16286;">(</span><span style="color: #fabd2f;">vsota-vecjih-kvadratov2</span> a b c<span style="color: #b16286;">)</span>
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<span style="color: #b16286;">(</span><span style="color: #fb4933;">if</span> <span style="color: #8ec07c;">(</span>>= a b<span style="color: #8ec07c;">)</span>
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<span style="color: #8ec07c;">(</span><span style="color: #fb4933;">if</span> <span style="color: #d65d0e;">(</span>>= b c<span style="color: #d65d0e;">)</span>
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<span style="color: #d65d0e;">(</span>+kvadrat a b<span style="color: #d65d0e;">)</span>
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<span style="color: #d65d0e;">(</span>+kvadrat a c<span style="color: #d65d0e;">)</span><span style="color: #8ec07c;">)</span>
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<span style="color: #8ec07c;">(</span><span style="color: #fb4933;">if</span> <span style="color: #d65d0e;">(</span>>= a c<span style="color: #d65d0e;">)</span>
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<span style="color: #d65d0e;">(</span>+kvadrat a b<span style="color: #d65d0e;">)</span>
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<span style="color: #d65d0e;">(</span>+kvadrat b c<span style="color: #d65d0e;">)</span><span style="color: #8ec07c;">)</span><span style="color: #b16286;">)</span><span style="color: #458588;">)</span>
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<span style="color: #458588;">(</span>list
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'<span style="color: #b16286;">(</span><span style="color: #b8bb26;">"Pricakovano"</span> 85 41 164 89<span style="color: #b16286;">)</span>
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<span style="color: #b16286;">(</span>list <span style="color: #b8bb26;">"Funkcija1"</span>
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<span style="color: #8ec07c;">(</span>vsota-vecjih-kvadratov 6 1 7<span style="color: #8ec07c;">)</span>
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<span style="color: #8ec07c;">(</span>vsota-vecjih-kvadratov 3 4 5<span style="color: #8ec07c;">)</span>
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<span style="color: #8ec07c;">(</span>vsota-vecjih-kvadratov 8 10 2<span style="color: #8ec07c;">)</span>
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<span style="color: #8ec07c;">(</span>vsota-vecjih-kvadratov 3 8 5<span style="color: #8ec07c;">)</span><span style="color: #b16286;">)</span>
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<span style="color: #b16286;">(</span>list <span style="color: #b8bb26;">"Funkcija2"</span>
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<span style="color: #8ec07c;">(</span>vsota-vecjih-kvadratov2 6 1 7<span style="color: #8ec07c;">)</span>
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<span style="color: #8ec07c;">(</span>vsota-vecjih-kvadratov2 3 4 5<span style="color: #8ec07c;">)</span>
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|
<span style="color: #8ec07c;">(</span>vsota-vecjih-kvadratov2 8 10 2<span style="color: #8ec07c;">)</span>
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|
<span style="color: #8ec07c;">(</span>vsota-vecjih-kvadratov2 3 8 5<span style="color: #8ec07c;">)</span><span style="color: #b16286;">)</span><span style="color: #458588;">)</span>
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</pre>
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</div>
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<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
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|
|
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<colgroup>
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<col class="org-left" />
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|
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<col class="org-right" />
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|
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<col class="org-right" />
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|
|
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<col class="org-right" />
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|
|
|
<col class="org-right" />
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|
</colgroup>
|
|
<tbody>
|
|
<tr>
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|
<td class="org-left">Pricakovano</td>
|
|
<td class="org-right">85</td>
|
|
<td class="org-right">41</td>
|
|
<td class="org-right">164</td>
|
|
<td class="org-right">89</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left">Funkcija1</td>
|
|
<td class="org-right">85</td>
|
|
<td class="org-right">41</td>
|
|
<td class="org-right">164</td>
|
|
<td class="org-right">73</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left">Funkcija2</td>
|
|
<td class="org-right">85</td>
|
|
<td class="org-right">41</td>
|
|
<td class="org-right">164</td>
|
|
<td class="org-right">89</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
</div>
|
|
|
|
<div id="outline-container-org9c2a7b0" class="outline-3">
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|
<h3 id="org9c2a7b0">1.4</h3>
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</div>
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</div>
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|
</div>
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|
<div id="postamble" class="status">
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|
<p class="author">Author: Jurij</p>
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|
<p class="date">Created: 2024-04-21 ned 17:35</p>
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|
<p class="validation"><a href="https://validator.w3.org/check?uri=referer">Validate</a></p>
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</div>
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</body>
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</html>
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