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

The Taming of the Deftype

Avatar for Baishampayan Ghose Baishampayan Ghose
May 11, 2012
Programming
2
160

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
Tweet

More Decks by Baishampayan Ghose

See All by Baishampayan Ghose
The Revenge of the Pragmatists
Avatar for Baishampayan Ghose bg
0
260
The Postmodern Programmer
Avatar for Baishampayan Ghose bg
0
100
The Roots of Go
Avatar for Baishampayan Ghose bg
1
1.8k
On Solving Problems
Avatar for Baishampayan Ghose bg
0
140

Other Decks in Programming

See All in Programming
AIによる高速開発をどう制御するか？ ガードレール設置で開発速度と品質を両立させたチームの事例
Avatar for tonkotsuboy_com tonkotsuboy_com
7
2.4k
Lambda のコードストレージ容量に気をつけましょう
Avatar for tatsuki-yamada tattwan718
0
140
組織で育むオブザーバビリティ
Avatar for ryotaro kobayashi ryota_hnk
0
180
AIエージェントのキホンから学ぶ「エージェンティックコーディング」実践入門
Avatar for Masahiro Nishimi masahiro_nishimi
6
630
AIと一緒にレガシーに向き合ってみた
Avatar for nyafunta9858 nyafunta9858
0
250
20260127_試行錯誤の結晶を1冊に。著者が解説 先輩データサイエンティストからの指南書 / author's_commentary_ds_instructions_guide
Avatar for nash_efp nash_efp
1
990
要求定義・仕様記述・設計・検証の手引き - 理論から学ぶ明確で統一された成果物定義
Avatar for Kuniwak orgachem
PRO
1
220
Fluid Templating in TYPO3 14
Avatar for Simon Praetorius s2b
0
130
Data-Centric Kaggle
Avatar for ねぼすけAI isax1015
2
780
余白を設計しフロントエンド開発を 加速させる
Avatar for karacoro / からころ tsukuha
7
2.1k
Vibe Coding - AI 驅動的軟體開發
Avatar for Micky Li mickyp100
0
180
Raku Raku Notion 20260128
Avatar for hareyaka hareyakayuruyaka
0
360

Featured

See All Featured
Embracing the Ebb and Flow
Avatar for Simon Collison colly
88
5k
YesSQL, Process and Tooling at Scale
Avatar for Rocio Delgado rocio
174
15k
技術選定の審美眼（2025年版） / Understanding the Spiral of Technologies 2025 edition
Avatar for Takuto Wada twada
PRO
117
110k
Abbi's Birthday
Avatar for Violet Bock coloredviolet
1
4.8k
The SEO Collaboration Effect
Avatar for Kristina Bergwall kristinabergwall1
0
350
JavaScript: Past, Present, and Future - NDC Porto 2020
Avatar for David Neal reverentgeek
52
5.8k
How to build a perfect <img>
Avatar for Jono Alderson jonoalderson
1
4.9k
Music & Morning Musume
Avatar for Bryan Veloso bryan
47
7.1k
Making Projects Easy
Avatar for Brett Harned brettharned
120
6.6k
My Coaching Mixtape
Avatar for mlcsv mlcsv
0
49
Building Applications with DynamoDB
Avatar for Matt Wood mza
96
6.9k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
Avatar for Eileen M. Uchitelle eileencodes
38
2.7k

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