IHaskell/notebooks/Test.ipynb

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  "language": "haskell",
  "name": "",
  "signature": "sha256:7262ddac633b02f026eb4bc29633234f9f8327226256b7f1660e72296f21935b"
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 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import IHaskell.Display\n",
      "\n",
      "-- My widget type\n",
      "data Slider = Slider\n",
      "\n",
      "instance IHaskellDisplay Slider where\n",
      "  display Slider = return $ Display []\n",
      "  \n",
      "instance IHaskellWidget Slider where\n",
      "  targetName _ = \"WidgetModel\"\n",
      "  open _ s = s undefined >> error \"what\"\n",
      "  "
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 1
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import System.Directory\n",
      "getDirectoryContents \".\""
     ],
     "language": "python",
     "metadata": {
      "hidden": false
     },
     "outputs": [
      {
       "metadata": {},
       "output_type": "display_data",
       "text": [
        "[\".\",\"..\",\".hdevtools.sock\",\"blog\",\"experiments\",\"hackathon\",\"haskell-course-preludes\",\"haskell-style-guide\",\"ihaskell\",\"ihaskell-app\",\"linal\",\"notes\",\"slinky.nb\",\"tasha\"]"
       ]
      }
     ],
     "prompt_number": 9
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      ":!cd code\n",
      ":!pwd\n",
      "setCurrentDirectory \"code\""
     ],
     "language": "python",
     "metadata": {
      "hidden": false
     },
     "outputs": [
      {
       "html": [
        "<span class='err-msg'>No such directory: 'code'</span>"
       ],
       "metadata": {},
       "output_type": "display_data",
       "text": [
        "No such directory: 'code'"
       ]
      },
      {
       "metadata": {},
       "output_type": "display_data",
       "text": [
        "/Users/silver/code"
       ]
      }
     ],
     "prompt_number": 8
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import Text.Parsec\n",
      "import Text.Parsec.String\n",
      "import Text.Parsec.Prim\n",
      "import Text.Parsec.Char\n",
      "\n",
      "data List = List [Float] deriving Show\n",
      "\n",
      "let -- Parse a nonempty int list like [1, 2, 3]\n",
      "    parser :: Parser List\n",
      "    parser = do\n",
      "      char '['\n",
      "      values <- option [] $ many1 (try float <|> int)\n",
      "      char ']'\n",
      "      return $ List values\n",
      "      \n",
      "    -- Parse an element of an int list,  like \"3, \"\n",
      "    int :: Parser Float\n",
      "    int = do\n",
      "      value <- many1 $ oneOf \"0123456789\"\n",
      "      optional $ char ','\n",
      "      whitespace\n",
      "      return (fromIntegral (read value :: Int) :: Float)\n",
      "      \n",
      "    float :: Parser Float\n",
      "    float = do\n",
      "      value <- many1 $ oneOf \"0123456789\"\n",
      "      char '.'\n",
      "      after <- many1 $ oneOf \"0123456789\"\n",
      "      optional $ char ','\n",
      "      whitespace\n",
      "      return (read (value ++ \".\" ++ after) :: Float)\n",
      "      \n",
      "    -- Parse any whitespace\n",
      "    whitespace = many $ oneOf \" \\t\"\n",
      "    \n",
      "parser"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "html": [
        "<div class='collapse-group'><span class='btn' href='#' id='unshowable'>Unshowable:<span class='show-type'>Parser List</span></span><span class='err-msg collapse'>No instance for (Show (Parser List)) arising from a use of `print'<br/>Possible fix: add an instance declaration for (Show (Parser List))<br/>In a stmt of an interactive GHCi command: print it</span></div><script>$('#unshowable').on('click', function(e) {\n",
        "    e.preventDefault();\n",
        "    var $this = $(this);\n",
        "    var $collapse = $this.closest('.collapse-group').find('.err-msg');\n",
        "    $collapse.collapse('toggle');\n",
        "});\n",
        "</script>"
       ],
       "metadata": {},
       "output_type": "display_data",
       "text": [
        "No instance for (Show (Parser List)) arising from a use of `print'\n",
        "Possible fix: add an instance declaration for (Show (Parser List))\n",
        "In a stmt of an interactive GHCi command: print it"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [],
     "language": "python",
     "metadata": {},
     "outputs": []
    }
   ],
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  }
 ]
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