# Ruby Hacking Guide - New chapters (and a bonus) **URL:** \ **Category:** Ruby\ **Created:** [April 5, 2006, 11:01am UTC](https://www.ruby-forum.com/t/ruby-hacking-guide-new-chapters-and-a-bonus/93632 "2006-04-05T11:01:38Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Vincent\_I](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/439d5e/32.png) [@Vincent\_I](https://www.ruby-forum.com/u/Vincent_I)\ **Post date:** [April 5, 2006, 11:01am UTC](https://www.ruby-forum.com/t/ruby-hacking-guide-new-chapters-and-a-bonus/93632/1 "2006-04-05T11:01:38Z")
Hi everyone, Here they are, translations of chapter 3, 4 and 6 of the Ruby Hacking Guide! We know the translation is far from being perfect, and we welcome any correction on the text or diagrams of any chapter (even chapter 2). Please send them as patches (attached to the mail, not just in the body of the message) on the rhg-discussion mailing list ([http://rubyforge.org/mailman/listinfo/rhg-discussion](http://rubyforge.org/mailman/listinfo/rhg-discussion)). The patches should be done against the text files in the SVN repository ([http://rubyforge.org/scm/?group\_id=1387](http://rubyforge.org/scm/?group_id=1387)). We also introduced a new feature: previews. It means we put on the web page chapters that have not be fully proofread and that may have missing diagrams. They are labelled with a big ‘PREVIEW’ on it. So do not hesitate to check our web page often to be able to read the chapters before they are announced (and send us corrections!). For example, the previews chapters released today were made available on the web page more that one week ago. I may repeat myself but we still need people to help, especially translators. If you can, even if it’s only for one chapter, come help us. Proofreaders are also welcome, the more they are, the better. I would like to especially thank the following people for making it possible: - Clifford Caoile for translating chapter 3 - Meinrad R. for making the diagrams - Jim Driscoll for his proofreading - and of course Minero A. for allowing us to translate his book. So if you want to read it, the official web page is still [http://rhg.rubyforge.org/](http://rhg.rubyforge.org/) :). But wait! Today I also have a bonus: a quick translation of matz’ YAPC::Asia 2006 slides. The slide in Japanese are available here: [http://www.rubyist.net/~matz/slides/yapc2006/](http://www.rubyist.net/~matz/slides/yapc2006/) They are mainly about multilingualisation in Ruby 2. Many thanks to matz for letting me post this translation and correcting my stupid mistranslations. For those who have no idea what TRON or Mojikyo is, and what are the problems of Unicode in Japan, you should check this: [http://www.jbrowse.com/text/unij.html](http://www.jbrowse.com/text/unij.html) So here comes the translation. It’s fact from being perfect, but it’s still easier to understand than the Japanese version 😉 – beginning of the translation YAPC::Asia 2006 Ruby on Perl(s) Yukihiro “Matz” Matsumoto removed\_email\_address@domain.invalid ## Copyright (c) 2006 Yukihiro “Matz” Matsumoto, No rights reserved though. How was Ruby born? - in a Lisp(ish) system - I added object oriented capabilities - and took in some Perl functions – That’s why Perl is Ruby’s big brother – Or Ruby’s big sister – Therefore ## Hello World is print “hello world\n” in Perl, Ruby or Python But in PHP it’s \ ## quite different on this point Ruby and Perl are similar but - Perl has everything - Ruby’s heart is object oriented – Ruby and Perl are similar but - Perl uses (most of the time) a functional word order - Ruby uses a Japanese word order – Functional word order print reverse(); ## prints the reversed ARGV. Japanese word order ARGF.readlines.reverse.display ## Take ARGF, call readlines on it, reverse readlines’ result, display reverse’s result (this is natural order in Japanese language) Ruby and Perl are similar but - Larry is American (even if he studies the Japanese language) - Matz is Japanese (even if he studies the English language) – Ruby and Perl are similar but - Perl is Unicode-centered - Ruby is decentralized – Ruby and Perl are similar but - Perl uses UCS (Universal Character Set) - Ruby is (will be) CSI (Character Set Independent) – What are your complaints towards Unicode? - it’s thoroughly used, isn’t it. - resentment towards Han unification? - inferiority complex of Japanese people? – What are your complaints towards Unicode? - no, no I do no have any complaints about Unicode - in the domains where Unicode is adequate – Then, why CSI? ## In most applications, UCS is enough thanks to Unicode. However, there are also applications for which this is not the case. Fields for which Unicode is not enough Big character sets - Konjaku-Mojikyo (Japanese encoding which includes many more than Unicode) - TRON code - GB18030 – Fields for which Unicode is not fitted Legacy encodings - conversion to UCS is useless - big conversion tables - round-trip problem – If a language chooses the UCS system - you cannot write non-UCS applications - you can’t handle text that can’t be expressed with Unicode – If a language chooses the CSI system - CSI is a superset of UCS - Unicode just has to be handled in CSI – … is what we can say but - CSI is difficult - can it really be implemented? – That’s where comes out Japan’s traditional arts Adaptation for the Japanese language of applications - Modification of English language applications to be able to process Japanese – Adaptation for the Japanese language of applications - What engineers of long ago experienced for sure ## In Japan, the know-how of adaptation for the Japanese language (multi-byte text processing) has been accumulated. Accumulation of know-how ## in the first place, just for local use, text using 3 encodings circulate (4 if including UTF-8) Based on this know-how - multibyte text encodings - switching between encodings at the string level - processing them at practical speed is finished – Available encodings euc\_tw euc\_jp iso8859\_\* utf-8 utf-32le ascii euc\_kr koi8 utf-16le utf-32be big5 gb2312 sjis utf-16be ## …and many others If it’s a stateless encodings, in principle it can be available. ## It means For applications using only one encoding, code conversion is not needed ## Moreover Applications wanting to handle multiple encodings can choose an internal encoding (generally Unicode) that includes all others If you want to - you can also handle multiple encodings without conversion, letting characters as they are - but this is difficult so I do not recommend it – However, only the basic part is done, it’s far from being ready for practical use - code conversion - guessing encoding - etc. – For the time being, today I want to tell everyone: - UCS is practical - but not all-purpose - CSI is not impossible – The reason I’m saying that They may add CSI in Perl6 as they had added - Methods called by “.” - Continuations from Ruby. Basically, they hate losing. – Thank you – end of the translation ---
**Author:** ![Vincent\_I](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/439d5e/32.png) [@Vincent\_I](https://www.ruby-forum.com/u/Vincent_I)\ **Post date:** [April 5, 2006, 11:35am UTC](https://www.ruby-forum.com/t/ruby-hacking-guide-new-chapters-and-a-bonus/93632/2 "2006-04-05T11:35:36Z")
Vincent I. ha scritto: > Hi everyone, > > Here they are, translations of chapter 3, 4 and 6 of the Ruby Hacking Guide! > > But wait! Today I also have a bonus: a quick translation of matz’ > YAPC::Asia 2006 slides. guys, thanks sooo much to all of you 🙂 ---
**Author:** ![Vincent\_I](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/439d5e/32.png) [@Vincent\_I](https://www.ruby-forum.com/u/Vincent_I)\ **Post date:** [April 5, 2006, 11:45am UTC](https://www.ruby-forum.com/t/ruby-hacking-guide-new-chapters-and-a-bonus/93632/3 "2006-04-05T11:45:07Z")
Vincent, This is awesome. Thank you to you and everyone else in this project. This is just excellent! Zach ---
**Author:** ![Vincent\_I](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/439d5e/32.png) [@Vincent\_I](https://www.ruby-forum.com/u/Vincent_I)\ **Post date:** [April 5, 2006, 4:11pm UTC](https://www.ruby-forum.com/t/ruby-hacking-guide-new-chapters-and-a-bonus/93632/4 "2006-04-05T16:11:18Z")
Great work doing the translations! ---
**Author:** ![Vincent\_I](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/439d5e/32.png) [@Vincent\_I](https://www.ruby-forum.com/u/Vincent_I)\ **Post date:** [April 5, 2006, 9:22pm UTC](https://www.ruby-forum.com/t/ruby-hacking-guide-new-chapters-and-a-bonus/93632/5 "2006-04-05T21:22:25Z")
On Apr 5, 2006, at 4:58 AM, Vincent I. wrote: > ([http://rubyforge.org/scm/?group\_id=1387](http://rubyforge.org/scm/?group_id=1387)). > Thanks! I just starting reading and, and found this gem of an > explanation for Qnil: > By the way, what is the ?Q? of Qnil? ?R? I would have understood > but why ?Q?? When I asked, the answer was ?Because it?s like that > in Emacs?. I did not have the fun answer I was expecting? > Me either! ---
**Author:** ![Vincent\_I](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/439d5e/32.png) [@Vincent\_I](https://www.ruby-forum.com/u/Vincent_I)\ **Post date:** [April 5, 2006, 10:02pm UTC](https://www.ruby-forum.com/t/ruby-hacking-guide-new-chapters-and-a-bonus/93632/6 "2006-04-05T22:02:20Z")
On 4/5/06, Logan C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > Please send them as patches (attached to the mail, not just in the > > in Emacs". I did not have the fun answer I was expectingâ?¦ > > Me either! It surely has to do with StarTrek, does it not? – Deux choses sont infinies : l’univers et la bêtise humaine ; en ce qui concerne l’univers, je n’en ai pas acquis la certitude absolue. - Albert Einstein ---
**Author:** ![Vincent\_I](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/439d5e/32.png) [@Vincent\_I](https://www.ruby-forum.com/u/Vincent_I)\ **Post date:** [April 7, 2006, 6:36am UTC](https://www.ruby-forum.com/t/ruby-hacking-guide-new-chapters-and-a-bonus/93632/7 "2006-04-07T06:36:46Z")
On Apr 6, 2006, at 7:29 AM, Christian N. wrote: > > > correction on the text or diagrams of any chapter (even chapter 2). > > > but why ?Q?? When I asked, the answer was ?Because it?s like that > > > in Emacs?. I did not have the fun answer I was expecting? > > > Me either! > > Same reason ?x is used for character codes, by the way. 😉 Whatever happened to #\x ?? ---
**Author:** ![Vincent\_I](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/439d5e/32.png) [@Vincent\_I](https://www.ruby-forum.com/u/Vincent_I)\ **Post date:** [April 6, 2006, 1:32pm UTC](https://www.ruby-forum.com/t/ruby-hacking-guide-new-chapters-and-a-bonus/93632/8 "2006-04-06T13:32:02Z")
Logan C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes: > > ([http://rubyforge.org/mailman/listinfo/rhg-discussion](http://rubyforge.org/mailman/listinfo/rhg-discussion)). The patches > > should be done against the text files in the SVN repository > > ([http://rubyforge.org/scm/?group\_id=1387](http://rubyforge.org/scm/?group_id=1387)). > > Thanks! I just starting reading and, and found this gem of an > explanation for Qnil: > > > By the way, what is the â??Qâ?? of Qnil? â??Râ?? I would have understood > > but why â??Qâ??? When I asked, the answer was â??Because itâ??s like that > > in Emacsâ?. I did not have the fun answer I was expectingâ?¦ > > Me either! Same reason ?x is used for character codes, by the way. 😉 ---
**Author:** ![Vincent\_I](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/439d5e/32.png) [@Vincent\_I](https://www.ruby-forum.com/u/Vincent_I)\ **Post date:** [April 7, 2006, 12:03pm UTC](https://www.ruby-forum.com/t/ruby-hacking-guide-new-chapters-and-a-bonus/93632/9 "2006-04-07T12:03:37Z")
Logan C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes: > > > > We know the translation is far from being perfect, and we welcome > > > > > > > By the way, what is the â??Qâ?? of Qnil? â??Râ?? I would have understood > > > > but why â??Qâ??? When I asked, the answer was â??Because itâ??s like that > > > > in Emacsâ?. I did not have the fun answer I was expectingâ?¦ > > > > Me either! > > > > Same reason ?x is used for character codes, by the way. 😉 > > Whatever happened to #\x ?? Debugger entered–Lisp error: (invalid-read-syntax “#”) I’m not sure where the ?x really orginates from, MacLisp didn’t support it, and it meant something different in TECO.