html/dia_guide_part4.php

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 100 <div id="Layer1"
 101  style="position: absolute; left: 335px; top: 42px; width: 388px; height: 43px; z-index: 1; font-size: x-small;">
 102 <div class="style1" align="right">PsN
 103 Developer's Guide to Dia<br>
 104 </div>
 105 </div>
 106 <div id="Layer2"
 107  style="position: absolute; left: 226px; width: 497px; z-index: 2; top: 188px; height: 1536px;">
 108 <div style="text-align: center;"></div>
 109 <div align="justify">
 110 <div style="text-align: center;">
 111 <table style="text-align: left; width: 100%;" border="0" cellpadding="2"
 112  cellspacing="2">
 113   <tbody>
 114     <tr>
 115       <td style="vertical-align: top; width: 33%; text-align: center;"><a
 116  href="dia_guide_part3.php">&lt;&lt;
 117 Page 3<br>
 118       </a></td>
 119       <td style="vertical-align: top; width: 33%; text-align: center;"><a
 120  href="dia_index.php">Dia
 121 Guide Index</a></td>
 122       <td style="vertical-align: top; width: 33%; text-align: center;"><a
 123  href="dia_guide_part5.php">Page
 124 5 &gt;&gt;</a></td>
 125     </tr>
 126   </tbody>
 127 </table>
 128 </div>
 129 <h3><span class="heading1">Dia2Code Data Types</span><br>
 130 </h3>
 131 <p> Perl has seven types of data
 132 (Actually, only five since Typeglobe and Code described below are
 133 actually references): </p>
 134 <dl>
 135   <dt> <b>Scalar</b> </dt>
 136   <dd>
 137     <p><span style="font-style: italic;">Scalars</span>
 138 are used in Perl to represent integers, floats, strings, and - to
 139 confuse things - references. Dia2Code makes a difference between
 140 references and scalars, so you should not specify a scalar if you want
 141 a reference in Dia. </p>
 142   </dd>
 143   <dt> <b>List</b> </dt>
 144   <dd>
 145     <p><span style="font-style: italic;">List</span>
 146 is what is used to create arrays and to pass arguments to functions in
 147 Perl. Some make a difference between lists and arrays by saying that
 148 lists are values and arrays are variables. And since you need types to
 149 specify what kind of variable you want, list is not a Dia2Code type.
 150 However you are welcome to use list for default values in Dia. </p>
 151   </dd>
 152   <dt> <b>Array</b> </dt>
 153   <dd>
 154     <p><span style="font-style: italic;">Arrays</span>
 155 in Dia2Code is special, since they are almost allways treated as
 156 references to arrays. An accessor to an array member returns a
 157 reference to the member and requires a reference as parameter. </p>
 158   </dd>
 159   <dt> <b>Hash</b> </dt>
 160   <dd>
 161     <p><span style="font-style: italic;">Hashes</span>,
 162 just like arrays, are treated as references to hashes in Dia2Code. </p>
 163   </dd>
 164   <dt> <b>Reference</b> </dt>
 165   <dd>
 166     <p>A reference in Dia2Code
 167 should be used if you want a reference to a reference. </p>
 168   </dd>
 169   <dt> <b>Typeglob</b> </dt>
 170   <dd>
 171     <p>Typeglobs in Dia2Code are
 172 used mainly for filehandles. </p>
 173   </dd>
 174   <dt> <b>Code</b> </dt>
 175   <dd>
 176     <p>Code references is used for
 177 referencing functions, members of explicit code blocks. </p>
 178   </dd>
 179 </dl>
 180 <p> Dia2Code accepts the following
 181 types:</p>
 182 <b> This part is not finished yet, sorry </b>
 183 </div>
 184 <div style="text-align: center;">
 185 <p align="justify">&nbsp;
 186 </p>
 187 </div>
 188 <table style="text-align: left; width: 100%;" border="0" cellpadding="2"
 189  cellspacing="2">
 190   <tbody>
 191     <tr>
 192       <td style="vertical-align: top; width: 33%; text-align: center;"><a
 193  href="dia_guide_part3.php">&lt;&lt;
 194 Page 3<br>
 195       </a></td>
 196       <td style="vertical-align: top; width: 33%; text-align: center;"><a
 197  href="dia_index.php">Dia
 198 Guide Index</a></td>
 199       <td style="vertical-align: top; width: 33%; text-align: center;"><a
 200  href="dia_guide_part5.php">Page 5 &gt;&gt;</a></td>
 201     </tr>
 202   </tbody>
 203 </table>
 204 </div>
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