April 2014
Beginner to intermediate
830 pages
15h 21m
Chinese
Content preview from Mathematica 錦囊妙計
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第五章
ch05.indd 226 2014/4/2 上午 06:13:35
5.11 實作語法分析器（Parser）與文法
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當然，這種方式與 XSLT 有顯著的差異。例如，於 XSLT 中操作 XML 樹時，可向上遊
歷母節點，也可以向下遊歷子節點，但這卻不適用於 Mathematica 的 XML 表示方式，
「延伸資訊」所列的教學文件提供類似差異性的處理方法。[Page-226]
延伸資訊
Mathematica 教 學 文 件
XML/tutorial/TransformingXML
（ 網 頁 版：
http://bit.ly/4tS1Ce
）
中，有一節在比較 Mathematica 與 XSLT，想更深入了解的讀者可參考。
XSLT 的相關資訊請參考 XSL Working Group 的網站：
http://bit.ly/1fJsB
。[Page-227]
5.11 實作語法分析器（Parser）與文法
問題點
你想在 Mathematica 中實作語法分析器。
解決方案
最易於 Mathematica 實作的語法分析器為遞迴下降分析器（recursive descent parser）。
首 先， 我 們 需 要 知 道 該 語 言 的 文 法 結 構。 最 常 見 文
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