Add IOCCC example just for fun

Author: cliburn

lessons/C Bootcamp.ipynb

@@ -1,7 +1,7 @@
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@@ -15,11 +15,102 @@
       "Why C?\n",
       "====\n",
       "\n",
-      "1. Speed\n",
-      "2. Use (or wrap) llibraries not available in language X\n",
-      "3. Under the hood, both R and Python are written in C"
+      "1. Speed (and size)\n",
+      "2. Use (or wrap) libraries not available in language X\n",
+      "3. C programs are portable across platforms\n",
+      "4. It is good enough to write the Linux and OSX operating systems, as well as languages such as R and Python"
      ]
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "### Why not C? \n",
+      "\n",
+      "What other language has an annual Obfuscated Code Contest <http://www.ioccc.org/>? \n",
+      "\n",
+      "Here is one winning [entry](http://www.ioccc.org/2013/dlowe/hint.html) that should warm the heart of statisticians - it displays sparklines (invented by Tufte).\n",
+      "\n",
+      "```c\n",
+      "main(a,b)char**b;{int c=1,d=c,e=a-d;for(;e;e--)_(e)<_(c)?c=e:_(e)>_(d)?d=e:7;\n",
+      "while(++e<a)printf(\"\\xe2\\x96%c\",129+(**b=8*(_(e)-_(c))/(_(d)-_(c))));}\n",
+      "```"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "%%file sparkl.c\n",
+      "main(a,b)char**b;{int c=1,d=c,e=a-d;for(;e;e--)_(e)<_(c)?c=e:_(e)>_(d)?d=e:7;\n",
+      "while(++e<a)printf(\"\\xe2\\x96%c\",129+(**b=8*(_(e)-_(c))/(_(d)-_(c))));}"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Overwriting sparkl.c\n"
+       ]
+      }
+     ],
+     "prompt_number": 539
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "!gcc -Wno-implicit-int -include stdio.h -include stdlib.h -D'_(x)=strtof(b[x],0)' sparkl.c -o sparkl"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [],
+     "prompt_number": 540
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import numpy as np\n",
+      "np.set_printoptions(linewidth=np.infty)\n",
+      "print ' '.join(map(str, (100*np.sin(np.linspace(0, 8*np.pi, 30))).astype('int')))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "0 76 98 51 -31 -92 -88 -21 60 99 68 -10 -82 -96 -41 41 96 82 10 -68 -99 -60 21 88 92 31 -51 -98 -76 0\n"
+       ]
+      }
+     ],
+     "prompt_number": 36
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "%%bash\n",
+      "\n",
+      "./sparkl 0 76 98 51 -31 -92 -88 -21 60 99 68 -10 -82 -96 -41 41 96 82 10 -68 -99 -60 21 88 92 31 -51 -98 -76 0"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "\u2585\u2588\u2588\u2587\u2583\u2581\u2581\u2584\u2587\u2589\u2587\u2584\u2581\u2581\u2583\u2586\u2588\u2588\u2585\u2582\u2581\u2582\u2585\u2588\u2588\u2586\u2582\u2581\u2581\u2585"
+       ]
+      }
+     ],
+     "prompt_number": 37
+    },
     {
      "cell_type": "markdown",
      "metadata": {},