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| 10 | <title>The MPL Reference Manual: Views</title> |
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| 15 | <td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./sequences.html" class="navigation-link">Sequences</a> / <a href="./views.html" class="navigation-link">Views</a></td> |
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| 16 | </tr></table><div class="header-separator"></div> |
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| 17 | <div class="section" id="views"> |
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| 18 | <h1><a class="toc-backref" href="./sequences.html#id344" name="views">Views</a></h1> |
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| 19 | <a class="target" id="label-sequences-views" name="label-sequences-views"></a><p>A <em>view</em> is a sequence adaptor delivering an altered presentation of |
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| 20 | one or more underlying sequences. Views are lazy, meaning that their |
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| 21 | elements are only computed on demand. Similarly to the short-circuit |
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| 22 | <a class="reference" href="./logical-operations.html">logical operations</a> and <a class="refentry reference" href="./eval-if.html"><tt class="refentry literal"><span class="pre">eval_if</span></tt></a>, views make it possible to avoid |
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| 23 | premature errors and inefficiencies from computations whose results |
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| 24 | will never be used. When approached with views in mind, many |
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| 25 | algorithmic problems can be solved in a simpler, more conceptually |
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| 26 | precise, more expressive way.</p> |
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| 27 | <!-- modtime: November 05, 2004 05:16:05 +0000 --> |
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| 28 | <!-- Sequences/Views//empty_sequence --> |
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| 29 | <ul class="toc simple" id="outline"> |
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| 30 | <li><a class="reference" href="./empty-sequence.html" id="id345" name="id345">empty_sequence</a></li> |
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| 31 | <li><a class="reference" href="./filter-view.html" id="id346" name="id346">filter_view</a></li> |
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| 32 | <li><a class="reference" href="./iterator-range.html" id="id347" name="id347">iterator_range</a></li> |
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| 33 | <li><a class="reference" href="./joint-view.html" id="id348" name="id348">joint_view</a></li> |
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| 34 | <li><a class="reference" href="./single-view.html" id="id349" name="id349">single_view</a></li> |
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| 35 | <li><a class="reference" href="./transform-view.html" id="id350" name="id350">transform_view</a></li> |
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| 36 | <li><a class="reference" href="./zip-view.html" id="id351" name="id351">zip_view</a></li> |
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| 37 | </ul> |
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