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       歡迎來到 Perl 的天地!

       從 5.8.0 版開始, Perl 具備了完善的 Unicode (萬國碼) 支援,
       也連帶支援了許多拉丁語系以外的編碼方式; CJK (中日韓)
       便是其中的一部份.  Unicode 是國際性的標準,
       試圖涵蓋世界上所有的字符: 西方世界, 東方世界,
       以及兩者間的一切 (希臘文, 敘利亞文, 阿拉伯文, 希伯來文,
       印度文, 印地安文, 等等). 它也容納了多種作業系統與平臺 (如
       PC 及麥金塔).

       Perl 本身以 Unicode 進行操作. 這表示 Perl
       內部的字串資料可用 Unicode 表示; Perl 的函式與算符
       (例如正規表示式比對) 也能對 Unicode 進行操作.
       在輸入及輸出時, 為了處理以 Unicode
       之前的編碼方式儲存的資料, Perl 提供了 Encode 這個模組,

       Encode 延伸模組支援下列正體中文的編碼方式 ('big5' 表示

           big5-eten   Big5 編碼 (含倚天延伸字形)
           big5-hkscs  Big5 + 香港外字集, 2001 年版
           cp950       字碼頁 950 (Big5 + 微軟添加的字符)

       舉例來說, 將 Big5 編碼的檔案轉成 Unicode,

           perl -Mencoding=big5,STDOUT,utf8 -pe1 < file.big5 > file.utf8

       Perl 也內附了 "piconv", 一支完全以 Perl
       寫成的字符轉換工具程式, 用法如下:

           piconv -f big5 -t utf8 < file.big5 > file.utf8
           piconv -f utf8 -t big5 < file.utf8 > file.big5

       另外, 利用 encoding 模組,
       你可以輕易寫出以字符為單位的程式碼, 如下所示:

           #!/usr/bin/env perl
           # 啟動 big5 字串解析; 標準輸出入及標準錯誤都設為 big5 編碼
           use encoding 'big5', STDIN => 'big5', STDOUT => 'big5';
           print length("駱駝");            #  2 (雙引號表示字符)
           print length('駱駝');            #  4 (單引號表示位元組)
           print index("諄諄教誨", "彖帢"); # -1 (不包含此子字串)
           print index('諄諄教誨', '彖帢'); #  1 (從第二個位元組開始)

       在最後一列例子裡, "諄" 的第二個位元組與 "諄"
       的第一個位元組結合成 Big5 碼的 "彖"; "諄"
       的第二個位元組則與 "教" 的第一個位元組結合成 "帢".
       這解決了以前 Big5 碼比對處理上常見的問題.

           big5-simp   Big5 正體中文與 Unicode 簡體中文互轉
           gbk-trad    GBK 簡體中文與 Unicode 正體中文互轉

       若想在 GBK 與 Big5 之間互轉, 請參考該模組內附的 b2g.pl 與
       g2b.pl 兩支程式, 或在程式內使用下列寫法:

           use Encode::HanConvert;
           $euc_cn = big5_to_gb($big5); # 從 Big5 轉為 GBK
           $big5 = gb_to_big5($euc_cn); # 從 GBK 轉為 Big5


       請參考 Perl 內附的大量說明文件 (不幸全是用英文寫的),
       來學習更多關於 Perl 的知識, 以及 Unicode 的使用方式. 不過,

       提供 Perl 資源的網址

           Perl 的首頁 (由歐萊禮公司維護)

           Perl 綜合典藏網 (Comprehensive Perl Archive Network)

           Perl 郵遞論壇一覽

       學習 Perl 的網址

           正體中文版的歐萊禮 Perl 書藉

           臺灣 Perl 連線討論區 (也就是各大 BBS 的 Perl 連線版)

       Perl 使用者集會

           臺灣 Perl 推廣組一覽


       Unicode 相關網址

           Unicode 學術學會 (Unicode 標準的制定者)



       Encode, Encode::TW, encoding, perluniintro, perlunicode


       Jarkko Hietaniemi <jhi@iki.fi>

       Autrijus Tang (唐宗漢) <autrijus@autrijus.org>

perl v5.8.1                 2003-09-02                  PERLTW(1)

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