Code Reading - Speaker Deck

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高見龍です

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高見龍です @eddiekao

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Code Reading Chimpr Learning more about Ruby by Reading Ruby Source Code

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I come from Taiwan photo by Fishtail@Taipei

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photo by J o n a G r a p h Y 

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photo by HeyNix

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photo by randomwire

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I’m a Python guy (≈ 2 years) I’m a iOS app guy (≈ 2 years) I’m a Flash guy (≈ 8 years) I’m a Ruby guy (≈ 4 years)

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But not a C guy, yet!

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Ruby > Rails

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“I’m a SHOW OFF person”

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“Experience Sharing is fun”

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Current Status 80% iOS app, 20% Ruby/Rails

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100% Ruby Lover!

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Web Development Conference in Taiwan

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2 days, 3 tracks session

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750+ attendees

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all tickets sold out in 4 mins

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WebConf Taiwan 2014

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Will be held on Jan 2014

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850+ attendees in 2014, hopefully.

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All about web development

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楽しい

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http://webconf.tw

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Code Reading

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Why read source code? How to start? What I learned? Anything interesting?

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Why read source code ?

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Ian Ruotsala

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http://blog.rubybestpractices.com/posts/gregory/005-code-reading-stdlib.html “once you start digging around in someone else’s code base, you’ll learn a lot about your own strengths and weaknesses” - Ruby Best Practice

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See how the Core Team write Ruby

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photo by chaines106 Read the source, Luke!

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source http://kyaraben.seesaa.net/article/168967765.html source code は友達

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Contribution!

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Committer in my dream!

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FUN! :)

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Requirement ?

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C language

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“What if I don’t have any skill of C?”

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“Just Learn It!”

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Curiosity and Passion

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Where to Start ?

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get source ﬁles!

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download from Ruby website, or clone from github

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Ruby 1.9.2 p290

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Quick browsing.. :)

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* .c + * .h * .rb (stdlib)

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Let’s have some fun!

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Object Class String Array Hash

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“ruby.h”

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Object => RObject Class => RClass String => RString Array => RArray Hash => RHash

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“object.c”

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Init_XXXX( )

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“all Class’s class is a Class”

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“new”

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class A def initialize puts "hello" end end a = A.new

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Proc

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How to execute a Proc?

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proc.call proc[ ] proc.yield proc === 123

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attributes

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push v.s. <<

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Object ID

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What else?

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Haskell-like syntax :)

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head (x:_) = x tail (_:xs) = xs

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people = { "Eddie" => ["green", "[email protected]"], "Joanne" => ["yellow", "[email protected]"] } people.map { |name, (color, email)| puts [name, email] }

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parse.y#8277-8299 shadowing_lvar_gen( ) people = { "Eddie" => ["green", "[email protected]"], "Joanne" => ["yellow", "[email protected]"] } people.map { |name, (_, email)| puts [name, email] }

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Method missing

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Anything interesting ?

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Interesting naming.. XD

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Conclusion

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“from basic structure”

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“don’t be afraid of source code”

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source http://kyaraben.seesaa.net/article/168967765.html source code は友達

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References

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http://i.loveruby.net/ja/rhg/book/ “Rubyソースコード完全解説” (RHG) by 青木峰郎

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http://patshaughnessy.net/ruby-under-a-microscope “Ruby Under a Microscope” by Pat Shaughnessy

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Chimpr Hope we all can become Jedi Master someday :)

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高見龍です

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以上です。ご清聴ありがとうございました thanks for your listening :)

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高見龍 Contacts photo by Eddie Website Blog Plurk Facebook Google Plus Twitter Email Mobile http://www.eddie.com.tw http://blog.eddie.com.tw http://www.plurk.com/aquarianboy http://www.facebook.com/eddiekao http://www.eddie.com.tw/+ https://twitter.com/#!/eddiekao [email protected] +886-928-617-687