Upgrade to Pro — share decks privately, control downloads, hide ads and more …

The Taming of the Deftype

Sponsored · Ship Features Fearlessly Turn features on and off without deploys. Used by thousands of Ruby developers. →
Avatar for Baishampayan Ghose Baishampayan Ghose
May 11, 2012
Programming
170
2

The Taming of the Deftype

Slides from a talk I presented at Clojure/West 2012, San Jose, CA.

Avatar for Baishampayan Ghose

Baishampayan Ghose

May 11, 2012

More Decks by Baishampayan Ghose

See All by Baishampayan Ghose
The Revenge of the Pragmatists
Avatar for Baishampayan Ghose bg
0
280
The Postmodern Programmer
Avatar for Baishampayan Ghose bg
0
110
The Roots of Go
Avatar for Baishampayan Ghose bg
1
1.8k
On Solving Problems
Avatar for Baishampayan Ghose bg
0
150

Other Decks in Programming

See All in Programming
ここ半年くらいでAIに作らせたR用ツール
Avatar for eitsupi eitsupi
0
390
MySQLとPostgreSQLって何が違うの？
Avatar for 赤神青空 akagami
0
120
楽しそうなつよつよエンジニアと目が死んでる僕/A brilliant engineer having a blast, and dead-eyed me.
Avatar for Ryusei Ohkura 3l4l5
2
200
生成AIで帳票OCRが「簡単に」作れる時代になった？
Avatar for Shohei Kondo kon_shou
0
1.1k
KotlinConf Extended South Korea 2026 Keynote
Avatar for HyunWoo Lee l2hyunwoo
0
110
変わらないものが、変わるものを決める — 意図駆動開発 × イベントソーシング × イミュータブル | What Doesn't Change Decides What Can — IDD × Event Sourcing × Immutability
Avatar for Tomohisa Takaoka tomohisa
0
1.8k
関東Kaggler会_NVIDIA_Nemotron_コンペ_振り返り
Avatar for rick rick_ds
0
670
FastAPI の並行処理モデルを完全に理解する
Avatar for Yuki Ishikawa hoto17296
1
210
Pythonの実行はどこまで賢くなったのか？ CPythonとPyPyから見る最適化のしくみ
Avatar for curekoshimizu curekoshimizu
0
150
Laravelで学ぶ Webアプリケーションチューニング入門/web_application_tuning_101
Avatar for Ryo Tomidokoro hanhan1978
4
1.9k
Laravel Boostに学ぶ、AIにPHPを書かせる技術 〜OSSの実装から蒸留するエージェント制御の王道〜
Avatar for 武田 憲太郎 kentaroutakeda
3
730
jsmini JavaScript Engine を作ってみた話
Avatar for Yosuke Furukawa yosuke_furukawa
PRO
0
340

Featured

See All Featured
Conquering PDFs: document understanding beyond plain text
Avatar for Ines Montani inesmontani
PRO
4
3k
4 Signs Your Business is Dying
Avatar for Josh Pigford shpigford
187
23k
Become a Pro
Avatar for Speaker Deck speakerdeck
PRO
31
6.2k
Producing Creativity
Avatar for Steve Smith orderedlist
PRO
348
40k
The Organizational Zoo: Understanding Human Behavior Agility Through Metaphoric Constructive Conversations (based on the works of Arthur Shelley, Ph.D)
Avatar for Dr. Kim W Petersen kimpetersen
PRO
0
420
Breaking role norms: Why Content Design is so much more than writing copy - Taylor Woolridge
Avatar for UX Y'all uxyall
0
370
Have SEOs Ruined the Internet? - User Awareness of SEO in 2025
Avatar for Akash Hashmi akashhashmi
0
430
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
Avatar for Sam Stephenson sstephenson
162
16k
Self-Hosted WebAssembly Runtime for Runtime-Neutral Checkpoint/Restore in Edge–Cloud Continuum
Avatar for Yuki Nakata chikuwait chikuwait
0
720
Thoughts on Productivity
Avatar for Jon Yablonski jonyablonski
76
5.3k
[RailsConf 2023] Rails as a piece of cake
Avatar for Vladimir Dementyev palkan
59
6.9k
Darren the Foodie - Storyboard
Avatar for Kevinho.art khoart
PRO
3
3.7k

Transcript

  1. deftype the taming of the Baishampayan “BG” Ghose @ghoseb Clojure/West

    2012 Friday 16 March 12

  2. @ghoseb helpshift.com Friday 16 March 12

  3. @ghoseb helpshift.com I caught a dead mouse in the office

    the other day Friday 16 March 12

  4. MOTIVATION Friday 16 March 12

  5. Friday 16 March 12

  6. Friday 16 March 12

  7. Maps Friday 16 March 12

  8. Records Friday 16 March 12

  9. Types Friday 16 March 12

  10. TO SUMMARIZE Friday 16 March 12

  11. deftype Performance Collection Abstractions Named Type Mutable Fields Full Control

    Friday 16 March 12

  12. defrecord Performance Collection Abstractions Named Type HashMap Semantics * Friday

    16 March 12

  13. maps Every other use-case Friday 16 March 12

  14. IN SHORT Friday 16 March 12

  15. Use Maps! Friday 16 March 12

  16. Dive into deftype Friday 16 March 12

  17. Use the source, Luke! Friday 16 March 12

  18. IPersistentMap Seqable Associative IPersistentCollection ILookup Counted IFn IPersistentSet IObj Object

    IMeta IPersistentStack Indexed IPersistentVector Friday 16 March 12

  19. IPersistentMap Seqable Associative IPersistentCollection ILookup Counted IFn IPersistentSet IObj Object

    IMeta IPersistentStack Indexed IPersistentVector Friday 16 March 12

  20. Friday 16 March 12

  21. Scaffold Friday 16 March 12

  22. ‘scaffold’ by Christophe Grand Friday 16 March 12

  23. } Interface we want Ancestor interface Method sigs. . .

    . . . . . Friday 16 March 12

  24. bit.ly/clj-scaffold steal this code! Friday 16 March 12

  25. A Note About IFn Holy arities, Batman! Friday 16 March

    12

  26. A Note About IFn Should implement all to avoid non-helpful

    exception. Friday 16 March 12

  27. MUTABLE TYPES Friday 16 March 12

  28. ^:volatile-mutable ^:unsynchronized-mutable atomic reads & writes a ‘vanilla’ Java mutable

    field Friday 16 March 12

  29. Friday 16 March 12

  30. Printing Friday 16 March 12

  31. clojure.core/print-method for humans Friday 16 March 12

  32. clojure.core/print-dup for the reader Friday 16 March 12

  33. #mylib.core.MyType[1,2,3] Object Literal Reader Syntax Friday 16 March 12

  34. Factory Functions Friday 16 March 12

  35. Hide Implementation Details Avoid Importing Java Classes Friday 16 March

    12

  36. (my-type :foo :bar) (import myns.MyType) (MyType. [:foo :bar]) vs. Friday

    16 March 12

  37. AN EXAMPLE IMPLEMENTATION (a weekend hack) Friday 16 March 12

  38. bit.ly/clj-chainmap steal this code! Friday 16 March 12

  39. Fin Friday 16 March 12

  40. Friday 16 March 12