Help/Files/FileReader.html

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  32 <p class="p1"><b>FileReader</b></p>
  33 <p class="p2"><br></p>
  34 <p class="p3"><span class="s1"><b>Inherits from: </b><a href="../Core/Object.html"><b>Object</b></a></span><b> </b><span class="s1"><b>: </b><a href="../Core/Kernel/AbstractFunction.html"><b>AbstractFunction</b></a></span><b> : </b><a href="../Streams-Patterns-Events/Stream.html"><b>Stream</b></a></p>
  35 <p class="p2"><br></p>
  36 <p class="p4"><b>FileReader reads space-delimited text files into 2D arrays line by line.</b></p>
  37 <p class="p2"><br></p>
  38 <p class="p4">For tab delimited files use: <a href="TabFileReader.html"><span class="s2">TabFileReader</span></a></p>
  39 <p class="p4">For comma-separated files, use: <a href="CSVFileReader.html"><span class="s2">CSVFileReader</span></a>.</p>
  40 <p class="p2"><br></p>
  41 <p class="p2"><br></p>
  42 <p class="p4"><b>*read(path, skipEmptyLines, skipBlanks, func, delimiter)</b></p>
  43 <p class="p5"><br></p>
  44 <p class="p5"><br></p>
  45 <p class="p6">(</p>
  46 <p class="p7">// write a test file:</p>
  47 <p class="p8"><span class="s1">f = </span><span class="s3">File</span><span class="s1">(</span>"FileReaderTest.sc"<span class="s1">, </span>"w"<span class="s1">);</span></p>
  48 <p class="p6">f.write(</p>
  49 <p class="p8">"Some space delimited items in line 1</p>
  50 <p class="p9"><br></p>
  51 <p class="p8">and then some more with several blanks <span class="Apple-converted-space">    </span>in line 3</p>
  52 <p class="p8">"</p>
  53 <p class="p6">);</p>
  54 <p class="p6">f.close;<span class="Apple-converted-space"> </span></p>
  55 <p class="p6">)</p>
  56 <p class="p5"><span class="Apple-tab-span">     </span></p>
  57 <p class="p5"><span class="Apple-tab-span">     </span></p>
  58 <p class="p7"><span class="s1"><span class="Apple-tab-span">    </span></span>// open file, read and put strings into array, close file.<span class="Apple-converted-space"> </span></p>
  59 <p class="p6">x = <span class="s3">FileReader</span>.read(<span class="s4">"FileReaderTest.sc"</span>).postcs;</p>
  60 <p class="p5"><br></p>
  61 <p class="p7"><span class="s1"><span class="Apple-tab-span">    </span></span>// can skip empty lines:<span class="Apple-converted-space"> </span></p>
  62 <p class="p6">x = <span class="s3">FileReader</span>.read(<span class="s4">"FileReaderTest.sc"</span>, <span class="s3">true</span>).postcs;</p>
  63 <p class="p5"><br></p>
  64 <p class="p7"><span class="s1"><span class="Apple-tab-span">    </span></span>// can skip blank entries caused by multiple spaces :<span class="Apple-converted-space"> </span></p>
  65 <p class="p6">x = <span class="s3">FileReader</span>.read(<span class="s4">"FileReaderTest.sc"</span>, <span class="s3">true</span>, <span class="s3">true</span>).postcs;</p>
  66 <p class="p5"><span class="Apple-tab-span">     </span></p>
  67 <p class="p7"><span class="s1"><span class="Apple-tab-span">    </span></span>// do file open/close by hand if you prefer:</p>
  68 <p class="p8"><span class="s1">f = </span><span class="s3">File</span><span class="s1">(</span>"FileReaderTest.sc"<span class="s1">, </span>"r"<span class="s1">); f.isOpen;</span></p>
  69 <p class="p10"><span class="s1">t = </span>FileReader<span class="s1">(f, </span>true<span class="s1">, </span>true<span class="s1">);<span class="Apple-tab-span">     </span></span></p>
  70 <p class="p6">t.read;</p>
  71 <p class="p6">f.close;</p>
  72 <p class="p5"><br></p>
  73 <p class="p11"><span class="s1"><span class="Apple-tab-span">   </span></span>// take letter "a" as delimiter:<span class="Apple-converted-space"> </span></p>
  74 <p class="p12">x = <span class="s5">FileReader</span>.read(<span class="s4">"FileReaderTest.sc"</span>, <span class="s5">true</span>, <span class="s5">true</span>, delimiter: $a).postcs;</p>
  75 <p class="p5"><br></p>
  76 <p class="p6">(</p>
  77 <p class="p7">// write a test file with numbers:</p>
  78 <p class="p8"><span class="s1">f = </span><span class="s3">File</span><span class="s1">(</span>"FileReadTestNum.sc"<span class="s1">, </span>"w"<span class="s1">);</span></p>
  79 <p class="p5"><br></p>
  80 <p class="p6">(1..10).do { <span class="s3">|n|</span> f.write(n.asString ++ <span class="s4">" "</span>); };</p>
  81 <p class="p6">f.close;<span class="Apple-converted-space"> </span></p>
  82 <p class="p6">)</p>
  83 <p class="p5"><br></p>
  84 <p class="p8"><span class="s1">x = </span><span class="s3">FileReader</span><span class="s1">.read(</span>"FileReadTestNum.sc"<span class="s1">).postcs;</span></p>
  85 <p class="p6">x.collect(<span class="s3">_</span>.collect(<span class="s3">_</span>.interpret));<span class="Apple-tab-span">   </span><span class="s6">// convert to numbers.</span></p>
  86 <p class="p5"><br></p>
  87 <p class="p7"><span class="s1"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span>// or do it immediately:</p>
  88 <p class="p6">x = <span class="s3">FileReader</span>.readInterpret(<span class="s4">"FileReadTestNum.sc"</span>).postcs;</p>
  89 <p class="p5"><br></p>
  90 <p class="p6">(</p>
  91 <p class="p7">// write a test file with several lines of numbers:</p>
  92 <p class="p8"><span class="s1">f = </span><span class="s3">File</span><span class="s1">(</span>"FileReadTestNum.sc"<span class="s1">, </span>"w"<span class="s1">);</span></p>
  93 <p class="p5"><br></p>
  94 <p class="p6">(1..100).do { <span class="s3">|n|</span><span class="Apple-converted-space"> </span></p>
  95 <p class="p6"><span class="Apple-tab-span">     </span>f.write(n.asString ++ if (n % 10 != 0, <span class="s4">" "</span>, <span class="s3">Char</span>.nl)); };</p>
  96 <p class="p6">f.close;<span class="Apple-converted-space"> </span></p>
  97 <p class="p6">)</p>
  98 <p class="p5"><br></p>
  99 <p class="p5"><br></p>
 100 <p class="p6">x = <span class="s3">FileReader</span>.readInterpret(<span class="s4">"FileReadTestNum.sc"</span>, <span class="s3">true</span>, <span class="s3">true</span>).postln;</p>
 101 <p class="p5"><br></p>
 102 </body>
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